JP5157673B2 - Imaging apparatus, focus position display method, and focus position display program - Google Patents

Description

  The present invention relates to an imaging device having an autofocus function, a focus position display method, and a focus position display program.

Conventionally, in a digital camera having an autofocus function, an object portion selected as an autofocus target or an automatically focused subject portion in an electronic viewfinder such as a liquid crystal monitor displaying a through image There is known a technique for displaying a focus frame indicating “overlapping” on a through image (for example, see Patent Document 1 below).
JP 2006-94200 A

  However, the user can know which subject portion within the angle of view is in focus by checking the position of the focus frame, but the subject portion and other subjects can be seen from the focus frame. There was a problem that the part and context could not be known clearly.

  The present invention has been made in view of such a conventional problem, and when the autofocus function is used, the distance to the subject portion can be easily set simultaneously with the position of the subject portion to be focused within the angle of view. An object is to provide an imaging apparatus, a focus position display method, and a focus position display program that can be known.

In order to solve the above-described problem, in the imaging apparatus according to the first aspect of the present invention, in an imaging apparatus having an autofocus function, display means for displaying captured image data of a subject as a through image, and an autofocus function Based on the identification means for identifying the subject part to be focused by the distance acquisition means for acquiring the distance to the subject part specified by the specification means, and the distance acquired by the distance acquisition means, and a display processing means for displaying superimposed on the through image display objects to three-dimensionally express the position in the depth direction for the device in the identified object portion on the display unit by identification means, said display processing means Is the position and shape of one display object drawn in a connected manner in the through image. Ri, characterized in that to represent both the vertical and horizontal directions of the position and the depth direction position of the object portion specified by the specifying means simultaneously.

In the image pickup apparatus according to the second aspect of the present invention , in an image pickup apparatus having an autofocus function, display means for displaying the image data of the photographed subject as a through image, and focusing by the autofocus function A specifying unit for specifying a subject part to be a target, a distance acquiring unit for acquiring a distance to the subject part specified by the specifying unit, and a specifying unit by the specifying unit based on the distance acquired by the distance acquiring unit Display processing means for causing the display means to display a display object for three-dimensionally expressing a position in the depth direction with respect to the apparatus in the subject portion that has been displayed, and the display processing means The position of each of the multiple display objects drawn in a connected manner in the image, and the multiple tables. The connection position of the object, characterized by simultaneously expressing both the position of the vertical lateral position and the depth direction of the specified object portion by the specifying means.

In the imaging apparatus according to the third aspect of the present invention , in the imaging apparatus having an autofocus function, display means for displaying the image data of the photographed subject as a through image, and focusing by the autofocus function A specifying unit for specifying a subject part to be a target, a distance acquiring unit for acquiring a distance to the subject part specified by the specifying unit, and a specifying unit by the specifying unit based on the distance acquired by the distance acquiring unit Display processing means for displaying a display object for three-dimensionally expressing the position in the depth direction with respect to the device in the subject portion displayed on the display means, and when shooting recording is instructed, Focusing was performed using the autofocus function on the subject part specified by the specifying means. Shooting and recording means for performing shooting and recording, and changing means for changing a subject portion to be focused in a stage before shooting recording is instructed after the display object is displayed by the display processing means. The specifying means sequentially specifies the subject part to be focused by the autofocus function every time the subject part to be focused is changed by the changing means, and the display processing means Each time the subject portion to be focused is changed by the changing means, the display object targeting the new subject portion is displayed .

In the image pickup apparatus according to the fourth aspect of the present invention , in the image pickup apparatus having an autofocus function, the display means for displaying the image data of the photographed subject as a through image, and the focusing by the autofocus function. A specifying unit for specifying a subject part to be a target, a distance acquiring unit for acquiring a distance to the subject part specified by the specifying unit, and a specifying unit by the specifying unit based on the distance acquired by the distance acquiring unit Display processing means for causing the display means to display a display object for three-dimensionally expressing a position in the depth direction with respect to the device in the subject portion that has been displayed, the display processing means including the display The object corresponds to the subject portion specified by the specifying means in the through image. With connecting the second position to a predetermined first position, the distance display line shape changes depending on the distance obtained by the distance obtaining means be displayed over the through image on the display means It is characterized by.

The display processing unit may further superimpose a parabola having a curvature corresponding to the distance acquired by the distance acquisition unit on the display unit as the distance display line on the through image. It is characterized by being displayed .

Further, in the invention according to claim 6 , the display processing means is a predetermined line segment region of a parabola having a predetermined curvature as the distance display line, and the region end on the first position side is the region end. A curve corresponding to a predetermined line segment region at a position corresponding to the distance acquired by the distance acquisition unit is displayed on the display unit so as to overlap the through image .

Further, in the invention according to claim 7 , the specifying means specifies an area within a predetermined focus frame set within an angle of view as a subject portion to be focused by the autofocus function, and the specifying means And determining means for determining a specific subject portion that is in the best focus state after focusing by the autofocus function, and the display processing means is determined by the determining means. A distance display line having the position corresponding to the specific subject portion as the first position is displayed on the display unit so as to overlap the through image .

In the image pickup apparatus according to the eighth aspect of the invention , in the image pickup apparatus having an autofocus function, the display means for displaying the image data of the photographed subject as a through image, and focusing by the autofocus function. A specifying unit for specifying a subject part to be a target, a distance acquiring unit for acquiring a distance to the subject part specified by the specifying unit, and a specifying unit by the specifying unit based on the distance acquired by the distance acquiring unit Display processing means for causing the display means to display a display object for three-dimensionally expressing a position in the depth direction with respect to the device in the subject portion that has been displayed, the display processing means including the display The object corresponds to the subject portion specified by the specifying means in the through image. Position and the display object for position display indicating, characterized thereby displayed superimposed on the through image on the display means and a plurality of parse line corresponding to the line of sight of the perspective drawing.

The display processing unit may further include a display object for position display on the subject line specified by the specifying unit on one of the plurality of perspective lines. The display means is displayed so as to be superimposed on the through image in association with a specific position corresponding to a subject portion having the same distance as the portion .

Further, in the invention according to claim 10 , the specifying unit specifies an area within a predetermined focus frame set within an angle of view as a subject part to be focused by the autofocus function, and acquires the distance. The means obtains the distance to each subject part within the entire field of view including the subject part specified by the specifying means, and after focusing by the autofocus function among the subject parts specified by the specifying means The image processing apparatus further includes a determination unit that determines a specific subject portion in which the in-focus state is the best, and the display processing unit is based on the distance to each subject portion in the entire area within the angle of view acquired by the distance acquisition unit A plurality of perspective lines are displayed on the display unit so as to overlap the through image, and are determined by the determination unit as display objects for the position display. The horizontal line and the vertical line that are orthogonal to each other on the specific subject portion are displayed on the through image so as to be superimposed on the through image. Thus, the specific position where the distance to the subject portion at the intersection is the same as the distance to the subject portion specified by the specifying means is defined as one end of the horizontal line .

The display processing unit may further include a predetermined unit defined by a position in the through image of a subject portion of the plurality of perspective lines identified by the identifying unit on the display unit. And displaying a plurality of auxiliary lines constituting a grid-like diagram representing a specific plane in a three-dimensional space together with the plurality of perspective lines, and further displaying the range on the through image. To do.

Further, in the invention described in claim 12 , the specifying means specifies an area within a predetermined focus frame set within an angle of view as a subject part to be focused by the autofocus function, and the specifying means Determination means for determining a specific subject portion that is in the best focus state after focusing by the autofocus function among the subject portions specified by the display, and the display processing means includes the plurality of perspective lines. Is displayed in a predetermined range defined by the position in the through image on the display unit of the specific subject portion determined by the determination unit .

Further, the invention according to claim 13 further includes a determining means for determining whether or not a plurality of subject parts whose distances from the apparatus are different from each other by a certain distance are present in the predetermined range, wherein the display processing means If it is determined by the means that a plurality of subject portions are present in the predetermined range, the display means displays the display object on the through image so that the plurality of subject portions exist in the predetermined range. When it is determined that the predetermined range is not to be displayed, another display object that shows the predetermined range two-dimensionally is displayed on the through image .

Further, the invention according to claim 14 is characterized in that the distance acquisition means acquires a distance to the subject portion based on a focusing operation by the autofocus function .

According to a fifteenth aspect of the present invention , there is provided a focus position display method comprising: a step of displaying image data of a photographed subject as a through image in an imaging device having an autofocus function; and a target to be focused by the autofocus function. A display object for three-dimensionally expressing a position of the subject portion in the depth direction with respect to the apparatus based on the acquired distance, a step of specifying the subject portion, a step of acquiring a distance to the specified subject portion A display step of superimposing the image on the through image, and the display step includes the step of identifying the subject portion specified by the specifying means based on the position and shape of one display object drawn in a connected manner in the through image. and characterized in that express both the vertical and horizontal directions of the position and the depth direction position at the same time That.

According to a sixteenth aspect of the present invention, there is provided a focus position display program comprising: a display unit configured to display a computer having an image pickup apparatus having an autofocus function as a through image; Based on the specifying means for specifying the subject part to be matched, the distance acquisition means for acquiring the distance to the subject part specified by the specifying means, and the specifying means based on the distance acquired by the distance acquisition means A display object for three-dimensionally expressing a position in the depth direction with respect to the apparatus in the subject portion specified by the display unit is displayed on the display unit so as to be superimposed on the through image, and the display processing unit includes: One display object drawn with connection in the through image The city of the position and shape, characterized by simultaneously represent both vertical and horizontal directions of the position and the depth direction position of the identified object portion by the specifying means.

According to a seventeenth aspect of the present invention , there is provided a focus position display method comprising: a step of displaying image data of a photographed subject as a through image in an imaging apparatus having an autofocus function; and a target to be focused by the autofocus function. A specifying step of specifying the subject portion, a step of acquiring the distance to the specified subject portion, and a display for three-dimensionally expressing the position of the subject portion in the depth direction with respect to the device based on the acquired distance A display step of displaying an object superimposed on the through image, and a step of shooting and recording after performing focusing by the autofocus function for the subject portion specified by the specifying step when an instruction for shooting and recording is given. After the display object is displayed in the display step, the shooting record is recorded. A change step of changing a subject portion to be focused in a stage before the instruction is given, and the specific step includes auto-focusing each time the subject portion to be focused is changed by the change step. The subject portion to be focused by the function is sequentially identified, and the display step includes the display object that targets a new subject portion every time the subject portion to be focused is changed by the changing step. Is displayed .

According to another aspect of the present invention, there is provided a focus position display program comprising: a display unit configured to display a computer having an image pickup apparatus having an autofocus function; Based on the specifying means for specifying the subject part to be matched, the distance acquisition means for acquiring the distance to the subject part specified by the specifying means, and the specifying means based on the distance acquired by the distance acquisition means Display processing means for displaying a display object for three-dimensionally expressing a position in the depth direction with respect to the apparatus in the subject portion specified by the display means on the through image on the through image, and when shooting and recording are instructed An autofocus device for the subject portion specified by the specifying means A shooting and recording unit that performs shooting and recording after performing the focusing in accordance with the above, and a subject portion that is a target to be focused before the shooting and recording is instructed after the display object is displayed by the display processing unit Each time the subject portion to be focused is changed by the changing portion, the identifying portion sequentially identifies the subject portion to be focused by the autofocus function. The display processing unit displays the display object targeting a new subject portion every time the subject portion to be focused is changed by the changing unit .

  According to the present invention, when the autofocus function is used, it is possible to easily know the distance to the subject portion as well as the position of the subject portion in focus within the angle of view.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a digital camera common to the embodiments. This digital camera has an autofocus (AF) function, an automatic exposure (AE) function, and a face detection function based on a known contrast detection method, and has the following configuration.

  That is, the lens block 1 is provided with an optical system including a lens group including a shutter 3, a diaphragm 4, a zoom lens 5, and a focus lens 6 provided in a lens barrel 2 of the camera body. The zoom lens 5 and the focus lens 6 can be mechanically moved in the optical axis direction by a drive mechanism (not shown) in the lens barrel 2.

  The lens block 1 includes a shutter actuator 7 for opening and closing the shutter 3, a diaphragm actuator 8 for driving the diaphragm 4, a zoom motor 9 and a focus motor 10 for driving the zoom lens 5 and the focus lens 6 by the driving mechanism, A zoom position detection sensor 11 and a focus position detection sensor 12 are provided for detecting the movement positions of the zoom lens 5 and the focus lens 6, respectively.

  The actuators 7 and 8 and the motors 9 and 10 are provided on the driver block 13 for the iris (Iris), shutter (Shutter), zoom (ZOOM), and focus (Focus) drivers 14 to 14, respectively. 17 is driven.

  The digital camera has a CCD imaging system block 18 comprising a CCD 19, which is an imaging means arranged behind the optical axis of the optical system, a CDS (Correlated Double Sampling) / AD block 20, and a TG (Timing Generator) 21. have.

  When the operation mode is set to the recording mode, the CCD 19 photoelectrically converts the light image of the subject imaged by the optical system and scan-driven by the TG 21 to output a photoelectric conversion output for one screen at a predetermined frame rate. Output. The CDS / AD block 20 performs noise removal by correlated double sampling and conversion to a digital signal with respect to an analog output signal that has been appropriately gain-adjusted for each RGB color component after being output from the CCD 19, and is a color process circuit 22 to output.

  The color process circuit 22 performs color process processing including pixel interpolation processing on the input image pickup signal, generates a digital luminance signal (Y) and color difference signals (Cb, Cr), and controls the entire digital camera. Output to. The CPU 23 is actually a microprocessor having an internal memory, various arithmetic processing circuits, a data input / output interface, and the like.

  The digital signal (image signal) sent to the CPU 23 is temporarily stored in the DRAM 24 as image data and then sent to the image display unit 25. The image display unit 25 includes a video encoder, a VRAM, a liquid crystal monitor which is a display means of the present invention, and a drive circuit thereof. A video signal is generated by the video encoder based on a digital signal sent via the CPU 23, and a display based on the video signal is generated. An image, that is, a through image of the subject after being picked up by the CCD 19 and thinned to a predetermined number of pixels, is displayed on the liquid crystal monitor.

  The key input unit 26 includes various keys such as a power key, a recording / playback mode changeover switch, a shutter key, a zoom key, and a menu key, and sends an operation signal to the CPU 23 according to the key operation by the user. For example, at the time of shooting operation in which the shutter key is pressed in the recording mode, a trigger signal indicating that is output to the CPU 23. The shutter key has a so-called half shutter function that can be operated in two steps, half-press and full-press. The half-press is used for AF lock and AE lock. This is a general configuration used for shooting instructions.

  When the trigger signal is input, the CPU 23 reads out the image data for one screen captured from the CCD 19 in accordance with the trigger signal from the DRAM 24 for each basic unit called a basic block of 8 vertical pixels × 8 horizontal pixels for each of Y, Cb and Cr components. The compressed data for one image compressed by DCT (Discrete Diffusion Transform) and encoding by the JPEG circuit 27 is stored in the image recording unit 28.

  Specifically, the image recording unit 28 includes a card interface and various nonvolatile memory cards that are connected to the CPU 23 via the card interface and are detachably attached to the camera body. The image data recorded in the image recording unit 28 is read by the CPU 23 in the reproduction mode, expanded by the JPEG circuit 27, and then displayed on the liquid crystal display monitor of the image display unit 25.

  Further, in the recording mode, the CPU 23 causes the lens control block 29 to generate drive signals to be sent to the drivers 14 to 17 of the driver block 13 described above, whereby the aperture of the diaphragm 4, the zoom lens 5 and the focus lens 6. And the opening / closing operation of the shutter 3 are controlled. When the autofocus mode is set as the focus mode, the focus lens 6 is controlled to the in-focus position by the contrast detection method. Further, the position detection information of the lenses 5 and 6 detected by the zoom position detection sensor 11 and the focus position detection sensor 12 is sequentially input to the CPU 23 via the lens control block 29.

  The flash memory 30 is a non-volatile memory in which stored contents can be rewritten. The flash memory 30 includes programs necessary for control of the digital camera by the CPU 23, that is, programs necessary for AF control, AE control, AWB control, etc., and a recording mode. The focus position display program for causing the CPU 23 to function as the specifying means, display processing means, distance acquisition means, determination means, and determination means of the present invention, and various data associated therewith, and the digital camera set by the user Setting information relating to various functions is also stored.

  The various data includes distance conversion data constituting the focus position-distance conversion table T shown in FIG. The focus position-distance conversion table T shows the focus lens 6 when the zoom lens 5 is at each of multiple zoom positions (focal lengths of the zoom lens 5) from the wide end “1” to the tele end “n”. It is a table which shows the relationship between the object distance which can ensure an in-focus state by movement, and a focus position (position of the focus lens 6). The subject distance is from infinity (∞) to the closest distance (10 cm), and the focus position data (Ftable (1, 1) to Ftable (n, n)) is preliminarily determined according to the characteristics of the optical system. In addition to the calculated theoretical value in design, some zoom positions do not have data corresponding to the closest subject distance.

  Next, the operation according to the present invention of the digital camera having the above configuration will be described. During the operation in the recording mode, the digital camera performs the imaging operation at the predetermined frame rate as described above, displays the through image of the subject on the liquid crystal monitor of the image display unit 25, and sequentially updates the through image, If the user presses the shutter key halfway at any time, the CPU 23 performs AF processing and focuses on an arbitrary subject within the angle of view.

  More specifically, the focus lens 6 is moved so as to change the in-focus position from the closest side to the infinity side, while a plurality of focus confirmation areas are fixedly provided at a plurality of positions within the angle of view. , The AF evaluation value (contrast value) is individually acquired based on the luminance information of the image data. Then, it is determined that there is a main subject in the focus confirmation area where the maximum value of the acquired AF evaluation value appears at the closest focus position, and the focus confirmation area is set as an AF area that is a focus target area. At the same time, the focus lens 6 is moved to a position where the AF evaluation value of the AF area is maximized.

  Then, when the above focusing is completed, the CPU 23 executes a focus display process described later shown in FIG. Hereinafter, when the AF processing is performed, as shown in FIG. 5, arbitrary subjects (persons, etc.) A and B having different distances from the camera are overlapped in the angle of view, and both subjects A , B will be described as an example when the focus confirmation area including AF is set as the AF area 101.

  In the focus display processing, the CPU 23 sets the AF area 101, which is a focus target range within the angle of view, to a plurality of sections 102, which are the smallest units that can measure the distance as shown in FIG. The area is divided into a plurality of sections 102 having the minimum area (pixel size) necessary for obtaining the AF evaluation value (step SA1). In this process, the coordinate position indicating the area in the image corresponding to each section 102 is stored in the internal memory.

  Next, by processing in steps SA2 to SA7 with all the sections 102 in the AF area 101 as a unit, each section 102 is made up of a plurality of sections 102 adjacent to each other and having the same distance to each subject portion. Divide into groups. That is, the background portion group G1, the subject A portion group G2, and the subject B portion group G3 as shown by the presence or absence of the filling and the difference in the filling pattern in FIG.

  Specifically, first, the distance to the subject portion within a predetermined area of interest is measured (step SA2). In such distance measurement, while moving the focus lens 6 in the optical axis direction, an AF evaluation value is acquired only for the target section, the focus lens 6 is moved to a position where the acquired AF evaluation value is maximized, and the current time point is measured. This is done by acquiring the subject distance corresponding to the zoom position and the focus position from the focus position-distance conversion table T (FIG. 2). In addition, the target section of interest at the beginning of processing is the section 102 at a predetermined position (for example, upper left) in the AF area 101.

  Subsequently, the subject distance is similarly obtained for the section adjacent to the target section (step SA3). If the subject distance is the same as the subject distance of the target section (YES in step SA4), the adjacent section is selected. It is registered as the same group as the noticed section (step SA5). Specifically, a group number is assigned to the target section in advance, and if the subject distance is the same, the same group number is assigned to the adjacent section and stored. The subject distance is also stored in association with the group number.

  Thereafter, if there is another adjacent section for the target section (YES in step SA6), the process returns to step SA3 and the same processing is performed for another adjacent section other than the above. Thereafter, steps SA3 to SA6 are repeated. Meanwhile, if the subject distance is not the same as the subject distance of the target section in any of the adjacent sections (NO in step SA4), the registration processing (assignment of group number) of the section is skipped.

  When there are no other adjacent sections for the target section, that is, when the processing of steps SA3 to SA5 for all the adjacent sections (maximum of eight sections) in order is completed (NO in step SA6), all It is checked whether or not there is an unregistered partition in which the above-described group registration is not performed. Then, while unregistered sections remain, the process returns to step SA2 (YES in step SA7), and any of the remaining sections is set as a new attention section, and the processes of steps SA2 to SA6 are repeated. Thereby, as described above, all the sections 102 in the AF area 101 are grouped into a plurality of groups including a plurality of sections 102 which are adjacent to each other and have the same distance to each subject portion.

  On the other hand, if there are no other unregistered sections, that is, when grouping is completed (NO in step SA7) while repeating the processes of steps SA2 to SA6 described above, although omitted in FIG. After returning the position to the control position immediately before the start of the focus display processing, each group (groups G1 and G2 in FIG. 6) except the group (group G1 in FIG. 6) whose distance to the corresponding subject portion is infinite. Are determined as one subject (a part of the subject), and the distances between the subjects (D1, D2 in FIG. 6) are compared based on the subject distance stored for each group number (step S1). SA8).

  If there are a plurality of subjects having different distances in the AF area 101 (YES in step SA9), a focus display process based on a three-dimensional expression described later is performed (step SA10). If it does not exist (NO in step SA9), a focus display process based on a two-dimensional representation is performed (step SA11), and the frame display process ends with the end of any focus display process.

  Here, in the frame display processing by the two-dimensional expression, the AF frame indicating the AF area 101 described above is displayed on the through image so as to indicate which subject portion within the angle of view has been focused. Tell the user.

  On the other hand, in the focus display process by the three-dimensional expression, the process shown in the flowchart of FIG. 4 is performed. First, a main subject is identified from the above-described plurality of subjects having different distances (step SA101). In this process, a subject whose distance is the same as or closest to the subject distance corresponding to the position of the focus lens 6 at that time (the control position by the AF process immediately before the start of the focus display process) among a plurality of subjects is selected. It is determined that the in-focus state is the best, and the subject in that region is specified as the main subject.

Next, after acquiring the distance to the main subject specified here, that is, after reading from the internal memory (step SA102), the curvature is calculated from the distance (step SA103). The curvature calculated here is a curvature of a distance display curve, which will be described later, and is calculated using a predetermined arithmetic expression in which the curvature decreases as the distance increases. The distance display curve is a parabola represented by “y = ax ² (a is a constant)”, and a constant a is calculated as the curvature. It should be noted that the curvature may be obtained from a database stored in the flash memory 30 in advance by storing a distance-curve conversion database indicating a relationship between an arbitrary distance and a curve, without calculation.

  Thereafter, a distance display curve having the calculated curvature is drawn (displayed) on the through image so as to connect a predetermined base point and a predetermined point (position) of the main subject (step SA104). FIG. 7 is a diagram corresponding to FIG. 5 showing the through image 111 in a state where the distance display curve 112 is displayed. In FIG. 7A, the subject A on the near side is specified as the main subject. FIG. 5B shows an example in which the back subject B is specified as the main subject. In the present embodiment, the base point Ps (second position) of the distance display curve 112 is the center of the lower side of the through image 111, and the point Pe (first position) on the main subject side is located on each of the subjects A and B. This is the barycentric position of the region formed by the plurality of sections of the corresponding groups G1 and G2 (see FIG. 6).

  As described above, in the present embodiment, even when there are a plurality of subjects having different distances in the AF area 101, the distance display curve 112 is displayed in the through image 111, so that the user can display the distance display. From the tip position on the subject side of the curve 112 (the drawing position on the subject side), it is possible to accurately know which subject (subject portion) of the plurality of subjects is in focus. At the same time, due to the difference in curvature of the distance display curve 112, the front-rear relationship with other subject portions existing in the AF area 101 can be clearly and intuitively known.

  Here, in the above-described focus display processing by the three-dimensional expression, the curvature of the distance display curve indicating the main subject in focus is changed according to the distance to the main subject. Also good. For example, the curvature of the distance display curve is fixed, and a predetermined line segment area of the distance display curve having a constant curvature is drawn on the through image, and the line segment area is changed according to the distance to the main subject. Specifically, the object side area end of the line segment area to be drawn may be brought closer to the inflection point (the apex of the parabola) of the distance display curve as the distance increases. FIG. 8 is a diagram corresponding to FIG. 7B showing the through image 111 in a state in which the distance display curve 112 is displayed in that case.

  In addition, the distance display curve drawn on the through image in the focus display processing by the three-dimensional expression is not limited to the parabola, but is changed according to the distance to the main subject in focus, that is, by changing the distance to the camera. As long as the position in the depth direction can be expressed, a curved line having an arbitrary shape (including a part of which intersects) may be used. Furthermore, as long as the position in the depth direction with respect to the camera can be expressed, in addition to the above-described distance display curve, other distance display lines such as a line segment (a broken line) in which a plurality of straight lines having different directions are connected. May be overlaid on the through image.

  In this embodiment, when the distance to the subject portion of each section 102 of the AF area 101 described above is acquired in steps SA2 and SA3, the focus lens 6 is moved each time to acquire the AF evaluation value. In the above description, the focus lens 6 is moved to the position where it becomes the maximum, but the distance to the subject portion of each section 102 may be acquired as follows.

  That is, immediately after step SA1, the focus lens 6 is moved once so as to change the in-focus position from the closest side to the infinity side, and the AF evaluation value for each focus position during that time is stored in advance for each section 102. In steps SA2 and SA3 described above, only the process of acquiring the subject distance corresponding to the focus position (and zoom position) when the AF evaluation value stored in advance is the maximum for any section 102 to be processed. May be performed. In that case, the processing efficiency can be improved by minimizing the number of times the focus lens 6 is moved. Furthermore, if the processing for storing the AF evaluation value for each focus position described above for each section 102 is performed in parallel with the AF processing in response to half-pressing of the shutter key, the processing efficiency can be further improved. .

(Embodiment 2)
Next, a second embodiment of the present invention will be described. This embodiment is different from the first embodiment in the three-dimensional representation shown in FIG. 9 during the focus display processing described in the first embodiment in the flash memory 30 in the configuration shown in FIG. This relates to a digital camera in which another focus position display program for causing the CPU 23 to perform the focus display process is stored. Hereinafter, the procedure of the focus display processing by the three-dimensional expression in the present embodiment will be described according to the flowchart of FIG. 9 with reference to FIGS. 10 and 11.

  As shown in FIG. 9, in the focus display processing by the three-dimensional expression, the CPU 23 first measures the distance D (N) to each subject portion within the angle of view (step SB1). In this process, the entire area within the angle of view is divided into a number of predetermined sections, and the focus lens 6 is moved once so as to change the in-focus position from the closest side to the infinity side. After the AF evaluation values for each section in FIG. 6 are individually stored in correspondence with the focus position, the subject corresponding to the focus position (and zoom position) when the AF evaluation value is maximum for each section, that is, each subject portion The distance is obtained from the focus lens position-distance conversion table in FIG. Note that after the above process is completed, the position of the focus lens 6 is returned to the control position immediately before the start of the focus display process.

  Next, for each of the subject portions, a plurality of points arranged along a line whose distance changes quantitatively and extends in an arbitrary direction are searched for and grouped for each line (step SB2). FIG. 10A is a diagram showing an example of the plurality of points P described above. Further, it corresponds to a line of sight in a perspective image method, that is, a virtual line extending toward a single vanishing point (vanishing point) from among a plurality of lines corresponding to the number of groups passing through a plurality of points P searched for each group. A perspective line is determined, and the determined plurality of perspective lines are drawn (displayed) on the through image (step SB3). FIG. 10B is a view showing a through image 201 in a state where a plurality of the perspective lines (one-dot chain lines in the figure) 202 are drawn.

  Subsequently, the distance DT to the subject is acquired. That is, the subject distance corresponding to the position of the focus lens 6 at that time (the control position by the AF process immediately before the start of the focus display process) is acquired (step SB4), and the most within the AF area 101 set by the AF process. The in-focus point in focus is confirmed (step SB5). Here, when confirming the in-focus point, the AF area 101 is divided into a plurality of smallest units capable of measuring distances, and the distances to the subject portions of the respective regions are obtained by the same method as in step SB1 described above. After that, the center of gravity of the subject area consisting of a section having the same or closest distance D as the distance D acquired in step SB4 and one or a plurality of sections adjacent to the section and having the same distance is obtained and used as a focal point. It is done by judging.

  Thereafter, a horizontal line and a vertical line orthogonal to each other at the focal point are drawn (displayed) on the through image 211 in a state where the perspective line 202 is drawn. At this time, as shown in FIG. 11, among the intersections of the perspective line 202 intersecting with the horizontal line 203 with the horizontal line 203, the distance to the subject portion at the intersection is the same as the distance DT to the focal point O. When there is an intersection point, the specific intersection point E is set as one end of the horizontal line 203 (step SB6).

  FIG. 11 is a diagram illustrating an example of the through image 211 in a state in which the horizontal line 203 and the vertical line 204 are drawn by such processing. FIG. 11A illustrates the best focus at a position different from the person. (The focal point O exists), the above-mentioned specific intersection point E exists in the second perspective line 202 from the top, and the intersection point E is the right end of the vertical line 204, b) is an example in which the person is most focused, the above-mentioned specific intersection point E exists in the third perspective line 202 from the top, and the intersection point E is the right end of the vertical line 204. is there. Although the AF area 101 is shown in FIG. 11 for convenience, it is not displayed in step SB6.

  As described above, in the present embodiment, even when there are a plurality of subjects having different distances in the AF area 101, the user can display the horizontal line 203 and the vertical line 204 on the through image 211, thereby allowing the user to From the intersection position of the horizontal line 203 and the vertical line 204, it can be accurately known which subject (subject portion) of the plurality of subjects is in focus. At the same time, from the position of the above-mentioned specific intersection point E on one of the perspective lines 202 indicated by one end of the horizontal line 203, the other subject parts existing in the AF area 101 and the other subject parts before and after Can be known clearly and intuitively.

  In the present embodiment, the display object for position display according to the present invention is a display object in which horizontal lines 203 and vertical lines 204 orthogonal to each other at the focal point O are displayed on the through image 211 together with a plurality of perspective lines 202. However, the present invention is not limited to this, and a specific position corresponding to a subject portion that is on the focal point O and one of the plurality of perspective lines 202 and has the same distance as the focal point O (specific in this embodiment). Any display object may be displayed on the through image 211 together with the plurality of perspective lines 202 as long as the correspondence relationship with the intersection point E) can be shown.

(Embodiment 3)
Next, a third embodiment of the present invention will be described. This embodiment is different from the first and second embodiments in the configuration shown in FIG. 1 during the focus display processing described in the first embodiment. The present invention relates to a digital camera in which another focus position display program for causing the CPU 23 to perform focus display processing by three-dimensional expression is stored. Hereinafter, the procedure of the focus display processing by the three-dimensional expression in the present embodiment will be described according to the flowchart of FIG. 12 with reference to FIG.

  As shown in FIG. 12, in the focus display processing by the three-dimensional expression, the CPU 23 first specifies a main subject from a plurality of subjects having different distances within the angle of view (step SC1). This process is the same as that in step SA101 of FIG. 4 described in the first embodiment, and among the plurality of subjects, the distance is the position of the focus lens 6 at that time (the AF immediately before the start of the focus display process). The subject that is the same as or closest to the subject distance corresponding to the processing control position) is determined as the region with the best focus state, and the subject in that region is identified as the main subject. Thereafter, as shown in FIG. 13A, a position display mark 301 indicating the identified main subject is displayed on the through image 311 (step SC2).

  Next, as shown in FIG. 13B, a horizontal line H is drawn at the position of the main subject in the through image 311 (step SC3). In the present embodiment, the horizontal line H passing through the center of gravity of the region where the in-focus state is the best is drawn.

  Furthermore, after determining the height h of the main subject (the drawing position of the horizontal line H) in the through image 311 (on the monitor screen) (step SC4), is it above or below the center of the screen (image)? Judging. If it is below the center of the screen (image) (“down” in step SC5), then, as shown in FIG. 13C, another distant position indicating the far position above the horizontal line H is continued. The horizontal line HF (N) is drawn so that the distance from the near line becomes narrower as it goes farther (step SC6), and the horizontal line HF (N) is drawn in such a manner that the width between the horizontal lines is determined in advance. Until the predetermined distance is reached (NO in step SC7).

  After that, when the width between the horizontal line HF (N) to be newly drawn and the horizontal line drawn immediately before falls below a certain distance (YES in step SC7), as shown in FIG. 13 (d). The other horizontal line HN (N) indicating the position of the near field is drawn below the horizontal line H so that the distance from the distant line becomes wider as it comes closer (step SC8), and the horizontal line HN (N ) Is repeated until the width between the horizontal lines reaches a predetermined distance (NO in step SC9).

  After that, when the width between the near-field horizontal line HN (N) to be newly drawn and the horizontal line drawn immediately before falls below a certain distance (YES in step SC9), this time, FIG. As shown, a plurality of vertical lines V (N) connecting the frontmost horizontal line to the backmost horizontal line are drawn (step SC14). At that time, the line at the center of the screen should intersect with each horizontal line described above vertically, and the lines on the left and right sides from the center of the screen should each go to a single vanishing point (vanishing point) in the perspective image method. Draw gradually at an angle. That is, a plurality of vertical lines V (N) corresponding to the perspective lines are drawn. As a result, a grid diagram 302 representing a specific plane in the three-dimensional space is displayed on the through image 311. The horizontal line H, the plurality of horizontal lines HF (N), and the horizontal line HN (N) described above are auxiliary lines of the present invention.

  On the other hand, unlike the above, if the main subject (horizontal line H) described above is above the center of the screen (image) (“up” in step SC5), the distant position is continued below the horizontal line H. The other horizontal line HF (N) shown is drawn so that the distance from the near-field line becomes narrower as it goes farther (step SC10), and the horizontal line HF (N) is drawn. Repeat until a predetermined distance is reached (NO in step SC11).

  Thereafter, when the width of the horizontal line HF (N) to be newly drawn and the horizontal line drawn immediately before become less than a certain distance (YES in step SC11), the position of the near field is continued above the horizontal line H. The other horizontal line HN (N) indicating that the horizontal line HN (N) is drawn so that the distance from the farther line becomes wider as it comes closer (step SC12), and the horizontal line HN (N) is drawn. Repeat until a predetermined distance is reached (NO in step SC13).

  After that, when the width of the near-field horizontal line HN (N) to be newly drawn and the horizontal line drawn immediately before become less than a certain distance (YES in step SC13), the farthest from the above-mentioned closest horizontal line is reached. A plurality of vertical lines V (N) connecting with the horizontal line are drawn (step SC14), thereby displaying a grid diagram 302 representing a specific plane in the three-dimensional space. Although not shown, the through image in this case is the one shown in FIG. 13E inverted up and down.

  As described above, in the present embodiment, the position display mark 301 described above is displayed on the through image 311, so that the user can accurately position the subject portion (main subject) in focus within the angle of view. I can know. At the same time, a grid-like diagram 302 as shown in FIG. 13E is displayed (drawn) in the through image 311, so that the subject portion that is in focus within the angle of view and the AF area 101 exist. It is possible to clearly and intuitively know the front-rear relationship with other subject portions to be performed and further with other subject portions.

  Here, in the first to third embodiments described above, any one of a plurality of focus confirmation areas fixedly provided at a plurality of positions within the angle of view is automatically selected when the shutter key is half-pressed. A digital camera having an AF function for setting an AF area as an AF area and focusing on the subject with the AF area as a target has been described. However, the present invention provides an AF area for an arbitrary subject portion designated in advance by a user within an angle of view. The present invention can also be applied to a digital camera having an AF function for performing focusing by setting.

  In this case, the area set as the AF area may be the minimum area (minimum distance measurement is necessary) required for obtaining the AF evaluation value, for example, unlike the above-described embodiments. Even in that case, the distance display line 112 (FIG. 7) described in the first embodiment, the parse line 202, the horizontal line 203 and the vertical line 204 (FIG. 11) described in the second embodiment, As shown in the grid diagram 302 (FIG. 13) described in the third embodiment, a display object for three-dimensionally expressing the position in the depth direction with respect to the apparatus in the subject portion is displayed superimposed on the through image. Thus, it is possible to clearly and intuitively notify the user of the front-rear relationship between the in-focus subject portion and the other subject portions in proximity thereto.

  In the first to third embodiments, when the focus is automatically performed in response to the half-press of the shutter key, the focus display based on the above-described three-dimensional expression is performed as necessary. However, the present invention is not limited to this, and the present invention always targets a specific subject portion regardless of whether or not the shutter key is half-pressed in a shooting standby state (a stage before shooting recording is instructed) while displaying a through image. As described above, while the focus adjustment is repeatedly performed, the focus display based on the above-described three-dimensional expression may be performed as necessary every time the focus is adjusted or every certain time. In this case, the specific subject portion to be focused may be, for example, a fixed subject portion (such as a central portion in the angle of view) or may be selected in advance from a plurality of candidates. It may be the subject part.

  Further, regarding the focus display by the three-dimensional expression described in the second and third embodiments, unlike the second and third embodiments, the focus is adjusted when the shutter key is half-pressed in the shooting standby state. A specific subject portion that is the target of the subject is determined, and then the subject portion is repeatedly focused while the shutter key is half-pressed to continuously focus on the moving subject. The present invention is also applicable to the case where AF control (so-called continuous AF) is performed, and the focus display based on the above-described three-dimensional expression may be performed every time focus is performed or every certain time.

  In this case, the specific subject portion to be focused may be, for example, a subject portion that exists at a predetermined position (such as the center portion) within the angle of view when the shutter key is half-pressed. Further, it may be a person's face part as long as it has a function of detecting the person's face part.

  Further, the digital camera having the contrast detection AF function has been described. For example, if the distance to a specific subject portion within the angle of view can be accurately obtained, the AF function by the distance measurement method using the distance sensor is used. The present invention can also be applied to those provided with the above. Furthermore, the present invention can be applied not only to a digital camera but also to other imaging devices incorporated in a digital video camera, a camera-equipped mobile phone, or the like.

It is a block diagram of the digital camera common to each embodiment of this invention. It is a conceptual diagram which shows a focus lens position-distance conversion table. It is a flowchart which shows the focus display process common to each embodiment. It is a flowchart which shows the focus display process by the three-dimensional expression in 1st Embodiment. It is the schematic diagram which showed an example of the to-be-photographed object which exists in an angle of view when AF process was performed. FIG. 6 is a schematic diagram corresponding to FIG. 5 showing a minimum unit section in the AF area 101 and a grouping state according to the subject distance of each section. FIG. 6 is a schematic diagram corresponding to FIG. 5 showing a through image in a state in which a distance display curve is displayed. It is a schematic diagram corresponding to FIG.7 (b) which shows the other example of a distance display curve. It is a flowchart which shows the focus display process by the three-dimensional expression in 2nd Embodiment. It is explanatory drawing which shows the drawing procedure of a perspective line. It is a figure which shows the example of the through image in the state by which the perspective line, the horizontal line, and the vertical line were drawn. It is a flowchart which shows the focus display process by the three-dimensional expression in 3rd Embodiment. It is explanatory drawing which shows the drawing procedure of the lattice-like diagram expressing the specific plane in a three-dimensional space.

Explanation of symbols

5 Zoom lens 6 Focus lens 11 Zoom position detection sensor 12 Focus position detection sensor 13 Driver block 19 CCD
23 CPU
24 DRAM
25 Image display section 29 Lens control block 30 Flash memory 101 AF area 102 Section 111 Through image 112 Distance display curve 201 Through image 202 Perspective line 203 Horizontal line 204 Vertical line 211 Through image 301 Position display mark 311 Through image 302 Grid diagram E Specific intersection H, HF (N), HN (N) Horizontal line T Focus position-distance conversion table Ps Base point of distance display curve Pe Point on main subject side of distance display curve V (N) Vertical line

Claims (18)

In an imaging device with an autofocus function,
Display means for displaying captured image data of the subject as a through image;
A specifying means for specifying a subject portion to be focused by the autofocus function;
Distance acquisition means for acquiring the distance to the subject part specified by the specification means;
Based on the distance acquired by the distance acquiring means, a display object for three-dimensionally expressing the position in the depth direction with respect to the apparatus in the subject portion specified by the specifying means is superimposed on the through image on the display means. and a display processing means for displaying Te,
The display processing means simultaneously determines both the vertical and horizontal position and the depth direction position of the subject portion specified by the specifying means according to the position and shape of one display object drawn in a connected manner in the through image. An imaging device characterized by expressing . In an imaging device with an autofocus function,
Display means for displaying captured image data of the subject as a through image;
A specifying means for specifying a subject portion to be focused by the autofocus function;
Distance acquisition means for acquiring the distance to the subject part specified by the specification means;
Based on the distance acquired by the distance acquiring means, a display object for three-dimensionally expressing the position in the depth direction with respect to the apparatus in the subject portion specified by the specifying means is superimposed on the through image on the display means. Display processing means to display
With
The display processing means is arranged in the vertical and horizontal directions of the subject portion specified by the specifying means based on the positions of the plurality of display objects drawn in a connected manner in the through image and the connection positions of the plurality of display objects. An imaging apparatus characterized by expressing both a position and a position in the depth direction simultaneously. In an imaging device with an autofocus function,
Display means for displaying captured image data of the subject as a through image;
A specifying means for specifying a subject portion to be focused by the autofocus function;
Distance acquisition means for acquiring the distance to the subject part specified by the specification means;
Based on the distance acquired by the distance acquiring means, a display object for three-dimensionally expressing the position in the depth direction with respect to the apparatus in the subject portion specified by the specifying means is superimposed on the through image on the display means. Display processing means to be displayed,
Shooting recording means for performing shooting recording after focusing by the autofocus function for the subject portion specified by the specifying means when shooting recording is instructed;
Changing means for changing a subject portion to be focused at a stage after the display object is displayed and before shooting recording is instructed;
With
The specifying unit sequentially specifies a subject part to be focused by the autofocus function every time the subject part to be focused is changed by the changing unit.
It said display processing means, every time the subject to subject portions of the focusing by the changing means is changed, the image pickup apparatus characterized by the display of the display object to target new object part. In an imaging device with an autofocus function,
Display means for displaying captured image data of the subject as a through image;
A specifying means for specifying a subject portion to be focused by the autofocus function;
Distance acquisition means for acquiring the distance to the subject part specified by the specification means;
Based on the distance acquired by the distance acquiring means, a display object for three-dimensionally expressing the position in the depth direction with respect to the apparatus in the subject portion specified by the specifying means is superimposed on the through image on the display means. Display processing means to display
With
The display processing unit connects, as the display object, a first position corresponding to the subject portion specified by the specifying unit in the through image and a predetermined second position, and the distance acquisition unit An image pickup apparatus, wherein a distance display line whose shape changes according to the acquired distance is displayed on the display unit so as to overlap the through image. Said display processing means, as the distance display line, according to claim 4, characterized in that to display a parabola having a curvature corresponding to the distance obtained by the distance obtaining means superimposed on the through image on the display means Imaging device. The display processing unit is a predetermined line segment region of a parabola having a predetermined curvature as the distance display line, and an area end on the first position side corresponds to the distance acquired by the distance acquisition unit. The imaging apparatus according to claim 4 , wherein a curve corresponding to a predetermined line segment region as a position is displayed on the display unit so as to overlap the through image. The specifying unit specifies a region within a predetermined focus frame set within the angle of view as a subject portion to be focused by the autofocus function,
A determination means for determining a specific subject portion that is in the best focus state after focusing by the autofocus function among the subject portions specified by the specifying means;
It said display processing means, wherein for causing displayed over the distance display line to the particular said positions corresponding to the subject portion of the first position determination by the determining means in the through image on the display means Item 7. The imaging device according to any one of Items 4 to 6 . In an imaging device with an autofocus function,
Display means for displaying captured image data of the subject as a through image;
A specifying means for specifying a subject portion to be focused by the autofocus function;
Distance acquisition means for acquiring the distance to the subject part specified by the specification means;
Based on the distance acquired by the distance acquiring means, a display object for three-dimensionally expressing the position in the depth direction with respect to the apparatus in the subject portion specified by the specifying means is superimposed on the through image on the display means. Display processing means to display
With
The display processing means includes, as the display object, a display object for position display indicating a position corresponding to the subject portion specified by the specifying means in the through image, and a plurality of perspective lines corresponding to a perspective line of sight. DOO imaging apparatus according to claim to be displayed superimposed on the through image on the display means. The display processing means corresponds to a display object for position display corresponding to a subject part on the perspective line of any one of the plurality of perspective lines and having the same distance as the subject part specified by the specifying means. 9. The image pickup apparatus according to claim 8, wherein the display unit displays the image on the through image in association with a specific position. The specifying unit specifies a region within a predetermined focus frame set within the angle of view as a subject portion to be focused by the autofocus function,
The distance acquisition means acquires the distance to each subject part in the entire area within the angle of view including the subject part specified by the specifying means,
A determination means for determining a specific subject portion that is in the best focus state after focusing by the autofocus function among the subject portions specified by the specifying means;
The display processing unit causes the display unit to display the plurality of perspective lines on the through image based on the distance to each subject portion in the entire area within the angle of view acquired by the distance acquisition unit, and the position As a display object for display, a horizontal line and a vertical line orthogonal to each other in the specific subject portion determined by the determination unit are displayed on the display unit so as to be superimposed on the through image, and at the time of displaying the horizontal line, A specific position that is an intersection of the perspective line with the horizontal line and that is the same as the distance to the subject portion specified by the specifying means is defined as one end of the horizontal line. The imaging apparatus according to claim 9 . The display processing unit causes the display unit to display the plurality of parse lines in a predetermined range defined by a position of the subject portion specified by the specifying unit in the through image, and to display the plurality of parse lines. 9. The image pickup apparatus according to claim 8, wherein a plurality of auxiliary lines constituting a grid-like diagram representing a specific plane in a three-dimensional space together with lines are further displayed on the through image. The specifying unit specifies a region within a predetermined focus frame set within the angle of view as a subject portion to be focused by the autofocus function,
A determination means for determining a specific subject portion that is in the best focus state after focusing by the autofocus function among the subject portions specified by the specifying means;
The display processing unit claims, characterized in that to be displayed in the predetermined range defined by the position in the through image on the display unit of the particular object portion which is judged the plurality of parsed line by said determining means 11. The imaging device according to 11 . A discriminator for discriminating whether or not there are a plurality of subject portions that are different from each other by a certain distance in the predetermined range;
The display processing unit causes the display unit to display the display object so as to overlap the through image when the determination unit determines that a plurality of subject portions exist in the predetermined range, and the determination unit displays a plurality of objects. 13. The display according to claim 11 , wherein when it is determined that the subject portion does not exist in the predetermined range, another display object that two-dimensionally displays the predetermined range is displayed on the through image. Imaging device. The imaging apparatus according to claim 1 , wherein the distance acquisition unit acquires a distance to a subject portion based on a focusing operation by the autofocus function. In an imaging device with an autofocus function,
Displaying the captured image data of the subject as a through image;
Identifying a subject portion to be focused by the autofocus function;
Obtaining a distance to the identified subject portion;
Based on the obtained distance, seen including a display step of displaying objects to three-dimensionally express the position in the depth direction displayed over the through image to the device in the subject portion,
The display step simultaneously represents both the vertical and horizontal position and the depth direction position of the subject portion specified by the specifying means, based on the position and shape of one display object drawn in a connected manner in the through image. A focus position display method characterized by:   A computer included in an imaging device having an autofocus function,
  Display means for displaying captured image data of the subject as a through image;
  A specifying means for specifying a subject portion to be focused by the autofocus function;
  Distance acquisition means for acquiring the distance to the subject part specified by the specification means;
  Based on the distance acquired by the distance acquiring means, a display object for three-dimensionally expressing the position in the depth direction with respect to the apparatus in the subject portion specified by the specifying means is superimposed on the through image on the display means. Display processing means to display
  To function,
  The display processing means simultaneously determines both the vertical and horizontal position and the depth direction position of the subject portion specified by the specifying means according to the position and shape of one display object drawn in a connected manner in the through image. A focus position display program characterized by expression.   In an imaging device with an autofocus function,
  Displaying the captured image data of the subject as a through image;
  A specific step of identifying a subject portion to be focused by the autofocus function;
  Obtaining a distance to the identified subject portion;
  A display step for displaying, on the through image, a display object for three-dimensionally expressing a position in the depth direction with respect to the device in the subject portion based on the acquired distance;
  A step of performing shooting and recording after performing focusing by the autofocus function for the subject portion specified by the specifying step when shooting recording is instructed;
  A change step of changing a subject portion to be focused in a stage before the shooting recording is instructed after the display object is displayed in the display step;
  Including
  The specifying step sequentially specifies the subject portion to be focused by the autofocus function every time the subject portion to be focused is changed by the changing step,
  The focus position display method characterized in that the display step displays the display object targeting a new subject portion every time the subject portion to be focused is changed by the changing step.   A computer included in an imaging device having an autofocus function,
  Display means for displaying captured image data of the subject as a through image;
  A specifying means for specifying a subject portion to be focused by the autofocus function;
  Distance acquisition means for acquiring the distance to the subject part specified by the specification means;
  Based on the distance acquired by the distance acquiring means, a display object for three-dimensionally expressing the position in the depth direction with respect to the apparatus in the subject portion specified by the specifying means is superimposed on the through image on the display means. Display processing means to be displayed,
  Shooting recording means for performing shooting recording after focusing by the autofocus function for the subject portion specified by the specifying means when shooting recording is instructed;
  Changing means for changing a subject portion to be focused at a stage after the display object is displayed and before shooting recording is instructed;
  To function,
  The specifying unit sequentially specifies a subject part to be focused by the autofocus function every time the subject part to be focused is changed by the changing unit.
  A focus position display program characterized in that the display processing means displays the display object for a new subject portion every time the subject portion to be focused is changed by the changing means.

Images