JP5385592B2 - Image processing apparatus and control method thereof - Google Patents

Description

  The present invention relates to a technique for processing encoded moving image data and generating a frame image to be displayed on a display unit formed by a plurality of display areas.

  In general, when drawing drawing information of a moving image, the drawing unit interprets the drawing information for each frame, for example, and generates pixel information. The input drawing information is a set of a plurality of types of objects (drawing objects) represented by figures and texts. Drawing information and drawing objects are described by, for example, SVG (Scalable Vector Graphics), Flash, PostScript, and the like.

  By the way, when a plurality of display devices display one large image, it is necessary to output pixel information to the display devices when drawing results of drawing devices connected to different display devices are obtained. Such a situation occurs when, for example, a matrix display device or a multi-television system uses a multi-display configuration in which a plurality of graphic devices are connected. Then, when there is an animation object that is divided and processed by a plurality of drawing units, flickering or frame displacement may occur due to differences between the drawing units. In order to prevent such flicker and frame deviation from appearing as a display image, it is necessary to control all the drawing units to draw the same frame. However, the drawing speed is determined by the performance of the drawing unit used at the time of drawing.

Therefore, for example, Patent Document 1 discloses an image forming apparatus that generates pixel information using a plurality of drawing units connected to each other by communication means. In particular, Patent Document 1 uses a communication processing unit to measure a transmission time required for a drawing unit to transmit drawing information, and adjust a pixel information transmission timing based on the measurement result, thereby displaying a display image. Is disclosed.
JP 08-55223 A

  However, according to the technique disclosed in Patent Document 1, the speed of generating pixel information for one frame that is finally sent to the display device is the drawing speed of the drawing unit with the lowest performance. This is because when the pixel information is sent to the display device in synchronization with the speed of the higher performance drawing unit, the lower performance drawing unit cannot complete the drawing of the image to be drawn. However, when the performance of the drawing processing unit is different, the display speed of all the graphic devices must be matched to the speed of the graphic device having the drawing processing unit having the lowest performance. In addition, since the time required for the drawing process of the vector image changes depending on the complexity of the image to be drawn, individual handling is required depending on the drawing target image. Therefore, it is impossible to always display an image with the highest image quality that can be realized by each drawing unit.

  The present invention has been made in view of the above-described problems, and provides a technique that enables a high-quality moving image to be displayed by a display device that forms a display unit with a plurality of display areas while reducing deterioration in drawing performance. With the goal.

In order to solve one or more problems described above, the image processing apparatus of the present invention has the following configuration. That is, in an image processing apparatus that generates a frame image to be displayed on a display device formed by N (N is an integer of 2 or more) display units, input means for inputting moving image data including one or more objects Drawing processing for rendering the moving image data and generating N frame images to be displayed in each of the N display areas; and two or more displays for each of the objects included in the moving image data A determination unit that determines whether or not to be divided and displayed, and an area that sets a display area of an object determined to be divided and displayed by two or more display units by the determination unit as a control target region setting means, the control image to be displayed in the target region, if the rendering processing can be the number of frames to draw processed by two or more different rendering means within a predetermined time, the control As for the drawing process of the image displayed in the elephant area, among the two or more drawing means, the drawing means having the smallest number of frames that can be drawn within a predetermined time is the number of frames that can be drawn. Control means for controlling to execute the drawing process .

  ADVANTAGE OF THE INVENTION According to this invention, the technique which makes it possible to display a high quality moving image with the display apparatus which forms a display part by a some display area, reducing drawing performance fall can be provided.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are merely examples, and are not intended to limit the scope of the present invention.

(First embodiment)
As an image processing apparatus according to a first embodiment of the present invention, an image display system having a display device constituted by two display devices will be described below as an example.

<Device configuration>
FIG. 1 is a diagram illustrating an internal configuration of the image processing apparatus according to the first embodiment. FIG. 2 is a diagram exemplarily showing a state in which a single large screen is constituted by two display devices. In particular, a state is shown in which moving image data including three (one or more) objects is displayed.

  The image processing apparatus 200 includes a drawing unit 219 and a drawing unit 220. The display device 213 and the display device 210 for displaying video signals generated and output by the drawing unit 219 and the drawing unit 220 are arranged outside the image processing apparatus 200 so as to form a single large screen. (FIG. 2). Note that the display device 213 and the display device 210 only display a video in accordance with a video signal input via the display controller 209, and will be described as having the same performance.

  The drawing unit 220 includes a first drawing unit 201, an area specifying unit 203, a drawing speed detecting unit 204, a drawing speed changing unit 205, and a communication unit 206. On the other hand, the drawing unit 219 includes a second drawing unit 202, a drawing speed detection unit 215 that detects a drawing speed, and a communication unit 212. In order to simplify the description, in FIG. 1, the function units of the area specifying unit 203 and the drawing speed changing unit 205 are illustrated to be included only in the drawing unit 220. However, the drawing unit 219 may be configured to include a similar function unit.

  The drawing speed detection unit 204 and the drawing speed detection unit 215 are functional units for detecting the drawing processing speed in the drawing unit 201 and the drawing unit 202, respectively. The area specifying unit 203 is a functional unit for specifying an area included in an image processed by the drawing unit 201. The drawing speed changing unit 205 is a functional unit that controls the drawing unit 201 to change the drawing processing speed. Further, the communication unit 206 and the communication unit 212 are functional units for the drawing unit 219 and the drawing unit 220 to communicate with each other. Further detailed operation of each functional unit will be described later with reference to FIG.

  The first drawing unit 201 and the second drawing unit 202 may be realized by causing a general-purpose processor such as a CPU to execute a program, or may be realized by dedicated hardware. In addition, the drawing speed changing unit 205, the area specifying unit 203, the drawing speed detecting unit 204, and the drawing speed detecting unit 215 may be replaced with functional units realized by executing a program.

  The image processing apparatus 200 is connected to the image bus 211 via the bus access arbitration unit 207. The bus access arbitration unit 207 is connected to a CPU 214 that controls the entire apparatus, processes vector image data, and the like. The CPU 214 has a drawing unit setting bus 217 and a drawing unit setting bus 218 for setting the drawing unit 201 and the drawing unit 202.

  The image bus 211 is also connected to a memory 208 that temporarily stores data necessary for drawing an image on the image device. The display controller 209 reads data from the memory 208 and sends pixel information constituting an image to the display device 210 and the display device 213. Examples of the display device include a liquid crystal, a rear projection display, and a cathode ray tube (CRT).

  In FIG. 1, the display controller 209 and the memory 208 are shown as blocks shared by the display device 210 and the display device 213, but may be provided for each display device. Alternatively, the display area of a single display device may be divided into a plurality of areas, and each may be assigned as a display area for the drawing unit 201 and the drawing unit 202.

  The image processing apparatus 200 displays the entire image 308 using the connected display devices 210 and 213. Here, to simplify the description, it is assumed that the entire image 308 is displayed in the entire area composed of the area 301 and the area 302 corresponding to the display areas of the display devices 210 and 213.

  Here, the drawing unit 201 executes the drawing process of the image displayed in the area 301. On the other hand, the drawing unit 202 executes the drawing process of the image displayed in the area 302. Further, as shown in FIG. 2, it is assumed that the entire image 308 includes an animation 304, an animation 307, and an animation 303. Further, as shown in FIGS. 2 and 3, the animation 304 is displayed by being divided into an area 305 which is a display area on the display device 210 and an area 306 which is a display area on the display device 213. .

  FIG. 4 is a diagram exemplarily showing the reference clock and each clock input to the drawing unit 201 and the drawing unit 202. The drawing unit 201 and the drawing unit 202 operate based on a clock 401 and a clock 402 input to the drawing unit 201 and the drawing unit 202, respectively. In the following, for the sake of simplicity of explanation, it is assumed that the drawing speed in each drawing unit is proportional to the clock. The drawing speed means the number of processing frames per unit time. Further, it is assumed that the clock 401 input to the drawing unit 201 has a frequency twice that of the reference clock 400 and the clock 402 input to the drawing unit 202 has a frequency that is ½ times that of the reference clock 400. That is, the clock 401 has a frequency four times that of the clock 402.

<Operation of the device>
FIG. 5 is an operation flowchart illustrating drawing process control by the image processing apparatus according to the first embodiment.

  In step S501, the CPU 214 initializes the image processing apparatus 200. For example, it is executed when the system is started or before the image forming process of one frame. More specifically, the CPU 214 sets the drawing area coordinates corresponding to the display device 210 and the display device 213 in the drawing unit 220 and the drawing unit 219. In addition, drawing information of the entire image 308 to be drawn is input to the image processing apparatus 200.

  In step S <b> 502, the CPU 214 divides drawing information included in the entire image 308 into drawing information in the area 301 and the area 302 as shown in FIG. 3. Then, drawing information of images displayed in the region 301 and the region 302 is sent to the drawing unit 201 and the drawing unit 202, respectively. The drawing information of the area 301 includes drawing information of the animation 307 and the animation 304. The drawing information of the area 302 includes drawing information of the animation 303 and the animation 304. Note that the drawing information includes at least information on image objects constituting the animation and coordinate information on an area where the animation is displayed.

  Note that instead of dividing and sending drawing information, drawing information corresponding to the entire image 308 may be sent to both the drawing unit 201 and the drawing unit 202. In this case, when each of the drawing unit 201 and the drawing unit 202 performs a drawing process of a part of the drawing information corresponding to the received whole image 308 based on the coordinate information of the region 301 and the region 302 to be drawn by itself. Good.

  In step S503, after sending the drawing information, the CPU 214 uses the drawing unit setting buses 217 and 218 to activate the drawing unit 201 and the drawing unit 202.

  In step S504, the drawing speed detection unit 204 and the drawing speed detection unit 215 acquire the drawing speed information of the drawing unit 201 and the drawing unit 202, respectively. Here, it is assumed that the drawing speed detection unit 204 derives drawing speed information based on the clock speed of each drawing unit. The drawing speed detection unit 204 compares the reference clock 400 and the clock 401 of the drawing unit 201, and sends, for example, a clock ratio to the drawing speed change unit 205. Further, the drawing speed detection unit 215 compares the reference clock 400 with the clock 402 of the drawing unit 202 and sends, for example, a clock ratio to the drawing speed changing unit 205 via the communication unit 212 and the communication unit 206.

  In step S <b> 505, the drawing speed changing unit 205 derives a drawing speed ratio between the drawing unit 201 and the drawing unit 202 and instructs the drawing unit 201. Here, since the drawing speed ratio is drawing unit 201: drawing unit 202 = 4: 1, the drawing speed ratio is 4. That is, the clock ratio is regarded as the drawing speed, and the drawing unit 201 is notified of the relative speed with respect to the drawing unit 202. Then, the drawing speed changing unit 205 instructs the drawing unit 201 and the drawing unit 202 to start drawing.

  In step S <b> 506, the drawing unit 201 notifies the region specifying unit 203 of the coordinate information of the region 301 that is the drawing target of the drawing unit 201. In addition, the drawing unit 202 notifies the region specifying unit 203 of the coordinate information of the region 302 to be drawn by the drawing unit 202 via the communication unit 212.

  In step S507, the area specifying unit 203 (determination unit) corresponds to information (area information in the frame image) of the area in which each of the objects (animations 307 and 304) included in the area 301 is displayed, and each drawing unit. The coordinate information (display area arrangement information) of the area 301 and the area 302 to be compared is compared. Then, an object that is displayed (divided) across two or more display areas is determined. In the case of the arrangement shown in FIG. 2, as a result of comparison, the animation 307 detects that the entire area is included in the area 301, and the animation 304 is an object extending over the area 301 and the area 302. Then, the area designation unit 203 (area setting unit, object setting unit) instructs the drawing unit 201 to designate the area 305 in the area 301 of the animation 304 (control target object) as the specified area (control target area).

  The drawing unit 201 performs a drawing process (step S508) as described below on the area 305, which is the designated area instructed by the area designating unit 203, based on the speed ratio calculated by the drawing speed changing unit 205.

<Details of frame drawing processing>
Next, details of the drawing processing in the drawing unit 201 and the drawing unit 202 will be described. It is assumed that the drawing unit 201 can perform drawing processing at 60 frames / second, and the drawing unit 202 can perform drawing processing at 15 frames / second. That is, as described above, the speed ratio of the drawing unit is the drawing unit 201: the drawing unit 202 = 4: 1.

  First, the drawing unit 201 receives the drawing information of the first frame in the drawing area 301 from the CPU 214. That is, in the situation of FIG. 2, drawing information of the animation 304 (or 305) and the animation 307 is received. Then, the drawing unit 201 draws the entire area in the area 301 as the first frame. After the drawing is finished, the drawing unit 201 notifies the CPU 214 of the drawing end of the first frame, and receives drawing information of the second frame in the drawing area 301 corresponding to the frame 1/60 seconds after the first frame from the CPU 214. .

  The drawing unit 201 draws only the inner area of the animation 307 (objects outside the control target area, other than the control target object) for the second frame (prohibiting restriction on the drawing speed). That is, drawing is not performed for the animation 304 (an object in the control target area). After the drawing is finished, the drawing unit 201 notifies the CPU 214 of the drawing end of the second frame, and receives the drawing information of the third frame in the drawing area 301 from the CPU 214. For the third and fourth frames, the drawing is performed only for the inner area of the animation 307 as in the second frame.

  Then, the drawing unit 201 receives, from the CPU 214, drawing information of the fifth frame in the drawing area 301 corresponding to a frame 1/15 second after the first frame. Then, the drawing unit 201 draws the entire area in the area 301 as the fifth frame. After the drawing ends, the drawing unit 201 notifies the CPU 214 of the drawing end of the fifth frame, and receives drawing information of the sixth frame in the drawing area 301 corresponding to the frame 1/60 seconds after the fifth frame from the CPU 214. .

  Similarly, the drawing of all areas in the area 301 is limited to be executed every four frames, and control is performed so that drawing is executed for each frame only for an object (animation 307) including the whole area in the area 301. To do.

  On the other hand, the drawing unit 202 receives the drawing information of the first frame in the drawing area 302 from the CPU 214. That is, in the situation of FIG. 2, the drawing information of the animation 304 (or 306) and the animation 303 is received. Then, the drawing unit 202 draws the entire area in the area 302 as the first frame. After the drawing is completed, the drawing unit 202 notifies the CPU 214 of the drawing end of the first frame, and receives drawing information of the second frame in the drawing area 302 corresponding to the frame after 1/15 second from the first frame. . From the viewpoint of display timing, the second frame of the drawing area 302 corresponds to the fifth frame of the drawing area 301. Then, the drawing unit 202 draws the entire area in the area 302 as the second frame. In the same manner, control is performed so that drawing of the entire area in the area 302 is executed for each frame.

  Even after the drawing is started, the drawing speed detection unit 204 and the drawing speed detection unit 215 monitor the operation speeds of the drawing unit 201 and the drawing unit 202. When the operation speed of the drawing unit 201 or the drawing unit 202 is changed, it is preferable to request the drawing speed changing unit 205 to reset the drawing speed. The resetting process is the same as the above-described setting process before startup. The resetting may be performed also when the arrangement of the object in the whole image 308 is changed. For example, when there is no more object that spans the area 301 and the area 302, the drawing unit 201 may be controlled to operate at the original drawing speed. Further, when the object extending between the area 301 and the area 302 is a still image object, flickering at the boundary portion does not occur, and thus the restriction on the drawing speed may be prohibited.

  As described above, according to the image processing apparatus according to the first embodiment, the drawing speed of some object images drawn by the drawing unit is controlled for at least one of the plurality of drawing units. With this configuration, it is possible to realize an image processing apparatus that does not cause an image shift due to a performance difference between rendering units even when rendering processing is performed on a plurality of display devices by a plurality of rendering units. For object images that do not extend over a plurality of display devices, it is possible to display an image with the highest image quality that can be realized by each drawing unit.

  In particular, the present invention can be suitably applied to a matrix type display device having N display units (N is an integer of 2 or more) and a multi-television system configuration to display animation. In other words, it is possible to prevent flickering due to the difference in the frame rate of the animation at the boundary portion of the display device. When an object extends over three or more display units, it is preferable to determine to draw at the slowest drawing speed among the three.

  In the first embodiment, the example in which the display screen is physically configured by a plurality of display units has been described. However, for example, the display area of one display unit may be physically divided into a plurality of parts and each display area may be drawn using a different drawing unit.

  In addition, even when a drawing unit is added to the image processing apparatus, the drawing speed can be matched with the existing drawing unit. Therefore, the image processing apparatus can be configured more flexibly.

(Second Embodiment)
In the second embodiment, an example will be described in which drawing start and completion timings are detected, drawing speeds of a plurality of drawing units are predicted, and a drawing speed ratio is calculated.

  FIG. 6 is a diagram illustrating an internal configuration of the image processing apparatus according to the second embodiment. FIG. 2 is a diagram exemplarily showing a state in which a single large screen is constituted by two display devices.

  Similar to the image processing apparatus 200 according to the first embodiment, the image processing apparatus 600 according to the second embodiment includes two drawing units. However, the drawing unit 601 is different from the drawing unit 220 in that the drawing unit 601 further includes a drawing speed prediction unit 603. The other functional units are almost the same as those in the first embodiment, and thus description thereof is omitted.

<Operation of the device>
FIG. 7 is an operation flowchart illustrating drawing process control by the image processing apparatus according to the second embodiment.

  In step S701, the CPU 214 initializes the image processing apparatus 200. For example, it is executed when the system is started or before the image forming process of one frame. More specifically, the CPU 214 sets the drawing area coordinates corresponding to the display device 210 and the display device 213 in the drawing unit 220 and the drawing unit 219. In addition, drawing information of the entire image 308 to be drawn is input to the image processing apparatus 200.

  In step S <b> 702, the CPU 214 divides drawing information included in the entire image 308 into drawing information in the area 301 and the area 302 as illustrated in FIG. 3. Then, drawing information of images displayed in the region 301 and the region 302 is sent to the drawing unit 201 and the drawing unit 202, respectively. The drawing information of the area 301 includes drawing information of the animation 307 and the animation 304. The drawing information of the area 302 includes drawing information of the animation 303 and the animation 304. Note that the drawing information includes at least information on image objects constituting the animation and coordinate information on an area where the animation is displayed.

  Note that instead of dividing and sending drawing information, drawing information corresponding to the entire image 308 may be sent to both the drawing unit 201 and the drawing unit 202. In this case, when each of the drawing unit 201 and the drawing unit 202 performs a drawing process of a part of the drawing information corresponding to the received whole image 308 based on the coordinate information of the region 301 and the region 302 to be drawn by itself. Good.

  In step S <b> 703, after the drawing information is transmitted, the CPU 214 activates the drawing unit 201 and the drawing unit 202 using the drawing unit setting buses 217 and 218.

  In step S704, the drawing speed detection unit 204 and the drawing speed detection unit 215 acquire the drawing speed information of the drawing unit 201 and the drawing unit 202 by causing each drawing unit to perform drawing processing. More specifically, the drawing speed detection unit 204 and the drawing speed detection unit 215 instruct the drawing unit 201 and the drawing unit 202 to start drawing and record the timing. The drawing speed detection unit 204 and the drawing speed detection unit 215 receive a drawing completion notification from each of the drawing unit 201 and the drawing unit 202 and record the timing. Then, the drawing speed detection unit 215 sends the drawing start timing and drawing completion timing information to the drawing speed prediction unit 603 via the communication unit 212 and the communication unit 206.

  Note that when the drawing unit 201 has finished drawing the first frame and the drawing speed information of the drawing unit 202 has not reached the drawing speed prediction unit 603, the drawing unit 201 displays the animation 303 included in the region 301. The area 306 and the area 306 are drawn.

  In step S <b> 705, the drawing speed prediction unit 603 derives a drawing speed ratio between the drawing unit 201 and the drawing unit 202 and instructs the drawing unit 201. More specifically, the drawing speed prediction unit 603 calculates the drawing speed ratio when the drawing speed information of both the drawing unit 201 and the second drawing unit 202 is obtained. The drawing speed ratio can be derived, for example, by directly obtaining the speed per frame based on the difference between the drawing start timing and the drawing completion timing. Further, it can also be obtained from the ratio of the number of drawing completion frames per unit time in the drawing unit 201 and the drawing unit 202. That is, the image of the first frame is processed as predetermined test data, and the speed is predicted.

  In step S <b> 706, the drawing unit 201 notifies the region specifying unit 203 of the coordinate information of the region 301 that is the drawing target of the drawing unit 201. In addition, the drawing unit 202 notifies the region specifying unit 203 of the coordinate information of the region 302 to be drawn by the drawing unit 202 via the communication unit 212.

  In step S707, the area specifying unit 203 (determination unit) displays information on the area in which each of the objects (animations 307 and 304) included in the area 301 is displayed, and the coordinates of the area 301 and the area 302 corresponding to each drawing unit. Compare information. In the case of the arrangement shown in FIG. 2, as a result of comparison, the animation 307 detects that the entire area is included in the area 301, and the animation 304 is an object extending over the area 301 and the area 302. Then, the area designating unit 203 instructs the drawing unit 201 to designate the area 305 in the area 301 in the animation 304 as the designated area.

  The drawing unit 201 performs a drawing process (step S708) as described below on the area 305, which is the designated area instructed by the area designating unit 203, based on the speed ratio calculated by the drawing speed changing unit 205.

<Details of frame drawing processing>
The drawing speed prediction unit 603 temporarily sets the number of frames that can be drawn by the drawing unit 201 before the drawing unit 202 completes drawing of one frame as the drawing speed of the area 305 that is the designated area. Then, the drawing unit 201 completes drawing of the entire area 301 for one frame. That is, the entire region is drawn for the first frame that is drawn after the drawing rate is temporarily set. For the subsequent frames, only the animation 307 is drawn by the number of frames temporarily set. That is, the area 305 is not drawn.

  After temporarily setting the drawing speed, the drawing speed prediction unit 603 measures the one-frame drawing time of the first drawing unit 201 when the region 305 is not drawn. The drawing speed prediction unit 603 draws the drawing before the drawing unit 202 completes drawing one frame, based on the drawing speed for drawing one frame in the entire area and the drawing speed for drawing one frame when the area 305 is not drawn. The drawing speed which the part 201 draws is updated.

  Even after the drawing speed is set, the drawing speed detection unit 204 and the drawing speed detection unit 215 monitor the operation speeds of the drawing unit 201 and the drawing unit 202. When the operation speed of the drawing unit 201 or the drawing unit 202 is changed, the drawing speed prediction unit 603 is requested to invalidate the set drawing speed. When the drawing speed setting is invalidated, the drawing unit 201 draws the entire area 302 until the drawing speed is set again. Thereafter, drawing of each frame is continued in the same manner.

  As described above, according to the image processing apparatus according to the second embodiment, the drawing speed of some object images drawn by the drawing unit is controlled for at least one of the plurality of drawing units. In particular, by sequentially measuring the processing speed for drawing the drawing information to be actually drawn, it is possible to cope with the case where the operation speed of each drawing unit is changed due to the operation mode change such as the power saving mode.

  In general, even in the drawing of a vector image in which the drawing time for each frame is indeterminate, the drawing speed can be adaptively changed, and the image shift between the drawing units can be prevented. Note that vector images include SVG, Flash, PostScript, and the like.

(Other embodiments)
Although the embodiments of the present invention have been described in detail above, the present invention may be applied to a system constituted by a plurality of devices or may be applied to an apparatus constituted by one device.

  The present invention can also be achieved by supplying a program that realizes the functions of the above-described embodiments directly or remotely to a system or apparatus, and the system or apparatus reads and executes the supplied program code. The Accordingly, the program code (computer program) itself installed in the computer in order to realize the functional processing of the present invention by the computer is also included in the technical scope of the present invention.

  In this case, the program may be in any form as long as it has a program function, such as an object code, a program executed by an interpreter, or script data supplied to the OS.

  Examples of the recording medium for supplying the program include a floppy (registered trademark) disk, a hard disk, an optical disk (CD, DVD), a magneto-optical disk, a magnetic tape, a nonvolatile memory card, and a ROM.

  Further, the functions of the above-described embodiments are realized by the computer executing the read program. In addition, based on the instructions of the program, an OS or the like running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments can also be realized by the processing.

  Further, the program read from the recording medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Thereafter, the CPU of the function expansion board or function expansion unit performs part or all of the actual processing based on the instructions of the program, and the functions of the above-described embodiments are realized by the processing.

It is a figure which shows the internal structure of the image processing apparatus which concerns on 1st Embodiment. It is a figure which shows a mode that a single big screen is comprised by two display devices. It is a figure which shows the object spanning two display devices exemplarily. FIG. 4 is a diagram exemplarily showing a reference clock and a clock input to each drawing unit. 6 is an operation flowchart illustrating control of drawing processing by the image processing apparatus according to the first embodiment. It is a figure which shows the internal structure of the image processing apparatus which concerns on 2nd Embodiment. It is an operation | movement flowchart which shows control of the drawing process by the image processing apparatus which concerns on 2nd Embodiment.

Claims (5)

An image processing device that generates a frame image to be displayed on a display device that forms a display unit with N display areas (N is an integer of 2 or more),
Input means for inputting moving image data including one or more objects;
A plurality of drawing means for drawing the moving image data and generating N frame images to be displayed in each of the N display areas;
Determination means for determining whether or not each of the objects included in the moving image data is divided and displayed in two or more display areas;
An area setting means for setting a display area of an object determined to be divided and displayed in two or more display areas by the determination means as a control target area;
When drawing an image to be displayed in the control target area by two or more drawing means having different numbers of frames that can be drawn within a predetermined time, the drawing process of the image to be displayed in the control target area is the two or more. A control means for controlling the two or more drawing means to execute the drawing process with the number of frames that can be drawn by the drawing means having the smallest number of frames that can be drawn within a predetermined time of the drawing means;
An image processing apparatus comprising: The detection means causes each of the plurality of drawing means to process predetermined test data, and determines the number of frames that each of the plurality of drawing means can perform drawing processing within a predetermined time based on the time required for the processing. The image processing apparatus according to claim 1 , further comprising prediction means for predicting. The determination means includes
The determination is performed based on arrangement information of the N display areas in the display device designated in advance and arrangement information in a frame image for each object included in the moving image data. The image processing apparatus according to claim 1. A control method for an image processing apparatus, wherein a frame image to be displayed on a display device forming a display unit by N display areas (N is an integer of 2 or more) is generated by a drawing unit.
An input step for inputting moving image data including one or more objects;
A determination step of determining whether or not each of the objects included in the moving image data is displayed by being divided into two or more display areas;
An area setting step in which an area setting unit sets a display area of an object determined to be divided and displayed in two or more display areas by the determination process as a control target area;
When the control means performs drawing processing of an image to be displayed in the control target area by two or more drawing means having different numbers of frames that can be drawn within a predetermined time, the drawing process of the image to be displayed in the control target area is as follows. A control step for controlling the two or more drawing means to execute the drawing process with the number of frames that can be drawn by the drawing means having the smallest number of frames that can be drawn within a predetermined time among the two or more drawing means ; ,
A control method for an image processing apparatus. The computer program for functioning a computer as each means of the image processing apparatus as described in any one of Claims 1 thru | or 3 .

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