JP5541007B2 - Image display device, image display method, and image display control program - Google Patents

Description

  The present invention relates to an image display device, an image display method, and an image display control program.

  In recent years, with the widespread use of digital cameras, it has become common to store photographs as digital image data. In the case of shooting with a conventional film camera, it was often accompanied by printing, but in the case of image data, it can be browsed with a digital camera that has shot, or it can be browsed with a personal computer that captures image data, etc. There are also changes in the way photos are enjoyed.

  Under such circumstances, so-called digital photo frames are realized and popularized so that image data can be enjoyed in the same way as conventional print photographs. The digital photo frame can be used as an album terminal for reproducing a photograph taken and viewing it at any time, displaying a slide show, or storing image data.

  In addition, by adding image processing, for example, it has been devised that it is possible to generate and display an image with a different tone (for example, a painting tone) based on the original photograph. (For example, patent document 1).

JP-A-8-44867

  In the digital photo frame as described above, a plurality of images can be continuously displayed while being switched automatically by the slide show function, but the number of images displayed by switching is naturally limited. Therefore, the same image is repeatedly displayed, and there is a problem that the user gets tired of viewing the image at an early stage.

  The present invention has been made in view of such a conventional problem, and even when the number of images to be switched is limited, an image display that can continue to be displayed while switching images of different tone by the slide show function. It is an object to provide an apparatus, an image display method, and an image display control program.

  In order to solve the above problem, in the image display device according to the first aspect of the present invention, at least one of the image storage means for storing a plurality of images and the plurality of images stored by the image storage means. Any one of the first image reading means for reading the image, the second image reading means for sequentially reading the images stored in the image storage means and repeating the reading operation, and the first and second image reading means Each time an image is read, one conversion parameter is selected from among a plurality of conversion parameters, and the selection target is selected depending on whether the image is read by the first image reading means or the second image reading means. Parameter reading means for varying the number of conversion parameters to be used, and the tone of the read image to change the selected tone. And image tone conversion means for converting the conversion degree based on the parameter, and a display control means for displaying the image converted to image tone at the image tone conversion means on the display means, characterized in that it comprises a.

  In the image display device according to the second aspect of the present invention, the image display device further includes parameter storage means for storing a plurality of different conversion parameters, and the parameter reading means is the first display device. Each time an image is read out by any one of the second image reading means, one conversion parameter is selected from a plurality of conversion parameters stored in the parameter storage means and read out.

  In the image display device according to the third aspect of the present invention, the parameter reading means includes a conversion parameter to be selected from among a plurality of conversion parameters stored in the parameter storage means. One conversion parameter is randomly read from the inside.

  In the image display device according to the fourth aspect of the present invention, the parameter reading unit reads the second image reading unit when compared with the first image reading unit. The number of conversion parameters to be selected from the parameter storage means is increased.

  In the image display device according to the fifth aspect of the present invention, the parameter storage means stores a plurality of parameters representing a brush pattern as a conversion parameter, and the image tone conversion means is based on the brush pattern. Then, the read image is converted into a painting style.

  The image display method according to the invention of claim 6 is an image display method in an image display device having an image storage means for storing a plurality of images, wherein the plurality of images stored by the image storage means. A first image reading step of reading at least one image from the images, a second image reading step of sequentially reading the images stored in the image storage means and repeating the reading operation, and the first and second images Each time an image is read in any of the reading steps, one conversion parameter is selected from among a plurality of conversion parameters, and when reading in the first image reading step and reading in the second image reading step And a parameter reading step for varying the number of conversion parameters to be selected. A tone conversion step for converting the tone of the read image with a conversion degree based on the selected conversion parameter, and an image whose tone is converted in the tone conversion step. And a display control step for displaying on the screen.

  In the image display control program according to the seventh aspect of the present invention, a plurality of images stored by the image storage means are stored in a computer used as an image display device having image storage means for storing a plurality of images. A first image reading step for reading at least one image from among the above, a second image reading step for sequentially reading the images stored in the image storage means, and repeating the reading operation, and the first and second image reading Each time an image is read out at any one of the steps, one conversion parameter is selected from a plurality of conversion parameters, and when reading out at the first image reading step and when reading out at the second image reading step, To read the parameters to change the number of conversion parameters to be selected. An image conversion step for converting the tone of the read image with a conversion degree based on the selected conversion parameter, and an image whose tone has been converted in the tone conversion step. And a display control step of displaying on the display means.

  According to the present invention, even if there is a limit on the number of images to be switched and displayed, it is possible to continue displaying images with different image tones by switching with the slide show function. As a result, the user is not bored with the image viewing at an early stage, and it is possible to improve the interest of the image viewing with the slide show function.

1 is a block diagram illustrating a circuit configuration and a system configuration of an image display apparatus according to an embodiment of the present invention. It is a figure which shows an example of a writing pattern. It is a memory block diagram of RAM. It is a flowchart which shows a main routine. It is a flowchart which shows the process sequence of a display process. It is a flowchart which shows the process sequence of SW process. It is a flowchart which shows the process sequence of a slide show SW process. It is a flowchart which shows the process sequence of conversion SW process. It is a flowchart which shows the process sequence of a display switching SW process. It is a flowchart which shows the process sequence of a slide show process. It is a flowchart which shows the process sequence of a conversion process. It is a flowchart following FIG. It is explanatory drawing which shows the arrangement | sequence of the pixel in an image. It is a transition diagram which shows the process sequence of a conversion process. FIG. 15 is a transition diagram illustrating a processing procedure for conversion processing following FIG. 14.

  Hereinafter, embodiments of the present invention will be described. FIG. 1 is a block diagram showing an electrical configuration of an image display device 1 according to the present embodiment and an image tone conversion system including the image display device 1. The image display device 1 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12 connected to the CPU 11, a RAM (Random Access memory) 13, and an internal memory 14. The ROM 12 will be described later in the CPU 11. A program or the like for performing the operation shown in the flowchart is stored.

  The CPU 11 also includes a painting conversion engine 200 that converts a photographic image into a painting-like image. The painting conversion process performed by the painting conversion engine 200 is a liquid crystal display panel that converts an image to be processed stored in the RAM 13 into a painting-like image having characteristics of the painting, that is, a painting-like image having a specific effect. 3 is displayed. In addition, a target painting type, that is, a brush pattern is selected at random when converting to a painting-like image.

  The internal memory 14 is a large-capacity nonvolatile memory such as a hard disk or a flash memory. Folders 141, 142,... 142... Can be stored every time.

  The display controller 16 causes the liquid crystal display panel 3 to display images and various menus by driving the liquid crystal display panel 3 based on display image data supplied from the CPU 11.

  The key input control unit 17 inputs an operation signal of the touch panel 5 and an operation signal of the key input unit 21 based on the control of the CPU 11. In the present embodiment, the key input unit 21 is provided with a slide show SW (switch), conversion SW, display switching SW, and other switches described later.

  The memory card interface 18 is an input / output interface that controls data input / output between the CPU 11 and various memory cards 60 that are detachably mounted in the memory card slot. The GPS control unit 20 acquires position information based on information received by the GPS antenna 7. Thereby, the current position of the image display apparatus 1 can also be known.

  The human sensor 19 is connected to the CPU 11 and detects whether a person is nearby. Therefore, when a person is not in the vicinity for a predetermined time or longer, the power is automatically turned off to save power (auto power off).

  The communication control unit 30 performs communication control including image and mail transmission / reception via the telephone line 31 or the wireless LAN 32. The address book 33 is used for mail transmission / reception, and is actually provided in the internal memory 14.

  The backup server 40 is connected via the network 90 and backs up data recorded in the internal memory 14 automatically or by a manual instruction. The content server 50 has a large number of contents and images, and can distribute data to the image display device 1 via the network 90.

  The imaging device 70 is a so-called digital camera, and includes an imaging device, an imaging control unit that controls the imaging device, an image transmission unit, and the like. In addition, the image capturing device includes a transmission unit that drives the image sensor to capture an image of a color subject at a predetermined period (frame rate) and transmits the captured live view image to the outside. The imaging device 70 is connected to the communication control unit 30 of the image display device 1 via a network 90 via a telephone line 31 or a wireless LAN 32. Therefore, the CPU 11 of the image display device 1 can sequentially capture the live view images captured by the imaging device 70 and transferred by the transmission unit.

  At this time, the imaging device 70 is arranged at a remote location different from the location of the image display device 1 owned by the user, so that the user can view the scenery of the remote location with the liquid crystal display panel 3 of the image display device 1. It can be selected as an image to be processed for viewing or converting the scenery of a remote place.

  Further, the power control unit 80 takes in AC power through the power plug 31, converts it into direct current, and supplies power to each unit. The auto power-off control described above is also performed.

  The ROM 12 stores a plurality of stroke patterns shown in FIG. 2 together with a program. For example, there are ten types of brush patterns, Pattern (1) to Pattern (10). In addition, these brushstroke patterns (1) to (10) take into account the painter's painting tone such as Van Gogh, Monet, Picasso, or oil painting, watercolor painting, pastel painting, pencil painting, crayon painting. In addition, the painting style for each type of picture such as illustration style, dot drawing style, airbrush style, etc. is taken into account.

  In each of the stroke patterns (1) to (10), the number from “1” indicates a pixel, and corresponds to the size of a region to be subjected to the tone conversion by the stroke pattern. Also, the set of pixels indicated by the numbers from “1” indicates the shape of the area where the image tone is changed. Therefore, the stroke patterns (1) to (10) have different sizes (areas) of image tone conversion in one process, or the same sizes of areas (area) of image tone conversion. Even if it exists, its shape is different.

  In other words, for example, in the case of the brush pattern (1), 10 pixels composed of “1” to “10” are regions (areas) in which the image tone is changed by one process, and two pixels on the upper and lower left ends. On the right side, the shape of the area composed of four pixels on the upper and lower sides, three on the upper and lower sides, and one pixel is a shape whose image tone is changed by one process. On the other hand, the other brush pattern is different from the brush pattern (1) in the size and shape of the region.

  Therefore, the size and shape of the areas of the plurality of brush pattern patterns are different from each other in this way, so that a photographed image can be clearly converted into a different tone according to the selected brush pattern.

  The RAM 13 is a working memory in which the CPU 11 temporarily stores various data as necessary, and is provided with a display area 131, an original image area 132, and a brush pattern area 133.

  In the display area 131, image data of an image sent to the display control unit 16 by the CPU 11 and displayed on the liquid crystal display panel 3 is stored. Also, the image tone changing process is performed on the image stored in the display area 131, and an image (image tone converted image) whose tone is converted is displayed on the liquid crystal display panel 3. In the original image area 132, image data of an image in the display area 131 that is a source for converting the image tone is copied and stored. In the stroke pattern area 133, the selected stroke pattern used for the current tone conversion among the stroke patterns (1) to (10) is stored by the processing in step SH5 of FIG.

  Next, the operation of the present embodiment according to the above configuration will be described. When a power switch provided in the key input unit 21 is turned on, the CPU 11 starts control and processing of each unit in accordance with a program stored in the ROM 12. FIG. 4 is a main flow showing the processing procedure of the CPU 11. The CPU 11 first performs initialization processing to set or reset a flag used in a flow to be described later, and clears the capture display area 131, the original image area 132, the writing pattern area 133, etc. of the ROM 12 shown in FIG. (Step SA1). By the processing in step SA1, the slide flag SLDF = 0, the change flag CF = 1, and the image counter G = 0 are set.

  The slide flag SLDF indicates that the slide show mode is set by SLDF = 1 and the slide show process is to be executed, and that the slide show mode is not set and the manual mode is set by SLDF = 0. . Further, the change flag CF being “1” indicates that it is the switching timing for displaying the next image read from the memory card 60 on the liquid crystal display panel 3.

  The image counter G is a counter that designates an image stored in various memory cards 60 that are detachably attached to the memory card slot according to the value. The memory card 60 stores a plurality of images corresponding to the serial number, with the top image number “0”. Therefore, in this embodiment, when the power is turned on, the image counter G = 0 is set in step SA1 in order to designate the head image. However, an arbitrary value may be set as long as the value is equal to or less than the number of images stored in the memory card 60 without setting the image counter G = 0. As a result, when the power switch is turned on, the image initially displayed on the liquid crystal display panel 3 can be a different image.

  Subsequently, display processing (step SA2), SW processing (step SA3), slide show processing (step SA4), conversion processing (step SA5), and other processing (step SA6) are performed until the power switch is turned off. Repeat sequentially.

  FIG. 5 is a flowchart showing details of the display process (step SA2). The CPU 11 determines whether or not the change flag CF is set (= 1) (step SB1). This change flag CF is set (= 1) by the processing in step SA1, and in step SF5 (FIG. 9) and step SG8 (FIG. 10) described later, and is reset (= 0) in step SB3 of this flow. Flag. When the change flag CF is “1”, the process proceeds from step SB1 to step SB2.

  Then, data of the image (G) that is the G-th image designated by the value of the image counter G is read from the memory card 60 and stored in the display area 131 (step SB2). Thus, when the image (G) data is stored in the display area 131, the image (G) data is sent to the display control unit 16 by the CPU 11 as described above, and the image (G) is sent to the liquid crystal display panel 3. Is displayed. Subsequently, the change flag CF is reset (← 0) and the process returns.

  FIG. 6 is a flowchart showing a processing procedure of the SW processing (step SA3). This process shows a process procedure when various switches provided in the key input unit 21 are operated. Specifically, the slide show SW process (step SC1), the conversion SW process (step SC2), and the display switching SW process ( Step SC3) and other SW processing (step SC4) other than these steps.

  FIG. 7 is a flowchart showing the procedure of the slide show SW process (step SC1). It is determined whether or not a slide show switch provided in the key input unit 21 has been pressed (step SD1). If the slide show switch is pressed, the slide flag SLDF is inverted (step SD2), and it is determined whether or not the slide flag SLDF = 1 is set as a result (step SD3). If SLDF = 1 and the slide show mode is set, after setting a predetermined time (for example, 7 seconds) to the timer counter t (step SD4), the timer interrupt prohibition is canceled (step SD5).

  Therefore, by canceling the timer interrupt prohibition in the process of step SD5, the value of the timer counter t is subtracted for each timer interrupt. That is, the timer counter t is a counter that measures the time interval for switching the image displayed on the liquid crystal display panel 3 in the slide show process. Therefore, if the determination in step SD3 is NO and SLDF = 0 and the slide show mode is canceled, it is not necessary to measure the time interval by the timer counter t, and timer interrupt is prohibited (step SD6). ).

  FIG. 8 is a flowchart showing a processing procedure of the conversion SW processing (step SC2). The CPU 11 determines whether or not the conversion SW provided in the key input unit 21 has been pressed (step SE1). If the conversion SW is pressed, the conversion flag HF is set to “1” (step SE2) and the process returns. Therefore, the conversion flag HF is set not only in step SG9 of a slide show process (FIG. 10) described later, but also when the conversion SW is pressed in the manual mode.

  FIG. 9 is a flowchart showing a processing procedure of the display switching SW process (step SC3). The CPU 11 determines whether or not the display switching SW provided in the key input unit 21 has been pressed (step SF1). If the display switching SW is pressed, “1” is added to the current value of the image counter G, and this is counted up (step SF2).

  Therefore, when the slide show mode is not set and the manual mode is set, the value of the image counter G is counted up by the process of step SE5 in response to the user's operation on the display switching SW. In a slide show process (FIG. 10), which will be described later, the count is automatically incremented by the process in step SG5.

  Next, it is determined whether or not the counted value of the image counter G has reached the number of images that is the number of images stored in various memory cards 60 that are detachably attached to the memory card slot. (Step SF3). If G> the number of images is not satisfied, the process proceeds to step SF5 without executing the process of step SF4, and the change flag CF is set to indicate that the display of the image displayed on the liquid crystal display panel 3 should be changed. (← 1).

  If G> the number of images, the initial value “0” is set in the image counter G (step SF4), and then the process of step SF5 is executed. Therefore, the image counter G changes between 0 and the number of images.

  FIG. 10 is a flowchart showing a processing procedure of the slide show processing (step SA4). First, the CPU 11 determines whether or not the slide flag SLDF is set (step SG1). When the slide flag SLDF is inverted in step SD2 of FIG. 7 and SLDF = 0 and the slide show mode is canceled, the process returns to the main routine without executing the subsequent processing. If SLDF = 1 and the slide show mode is set, it is determined whether or not the minimum unit time has elapsed (step SG2). This minimum time unit is a unit of the time interval t measured by the timer counter t, for example, 1 second.

  When the minimum time unit has elapsed, the value of the timer counter t is decremented by “1” and counted down (step SG3). Then, it is determined whether or not the value of the counted-down timer counter t becomes “0” or less (step SG4), and the processing from step SG1 is repeated until t ≦ 0. Therefore, the value of the timer counter t is counted down every time the minimum unit time elapses. As a result, when t ≧ 0, the process proceeds from step SG4 to step SG5, and the value of the image counter G is counted up. Therefore, when the slide show mode is set, the value of the image counter G is incremented every time the time interval t elapses, unlike when the manual mode is set.

  Next, it is determined whether or not the counted value of the image counter G has reached the number of images that is the number of images stored in various memory cards 60 that are detachably attached to the memory card slot. (Step SG6). If G> the number of images is not satisfied, the processing after step SG8 is executed without executing the processing of step SG7. If G> the number of images, the initial value “0” is set in the image counter G. (Step SG7).

  Thereafter, in order to indicate that the image displayed on the liquid crystal display panel 3 should be changed, the change flag CF is set (← 1) (step SG8), and the changed image is to be subjected to the tone conversion. Therefore, the conversion flag HF is set (← 1) (step SG9). Further, the predetermined time is set in the timer counter t (step SG10), and the process returns.

  Therefore, when the slide show mode is set, the value of the image counter G is automatically counted up with the time interval t by executing this slide show process. Each time the value of the image counter G is counted up, the change flag CF and the conversion flag HF are set, and a predetermined time is set at t.

  11 and 12 are a series of flowcharts showing the processing procedure of the conversion processing (step SA5). The CPU 11 determines whether or not the conversion flag HF is set (= 1) (step SH1). If the conversion flag HF is not set (= 0), the CPU 11 returns. If the conversion flag HF is set, it is determined whether or not the slide flag SLDF is set, that is, whether or not the slide show mode is set (step SH2).

  When SLDF = 1 and the slide show mode is set, a random number (N1) value which is randomly generated from a numerical value whose maximum value is N1 is stored in the first random number register R1. (Step SH3). When SLDF = 0 and the slide show mode is not set, that is, when the manual mode for changing the display of the image displayed on the liquid crystal display panel 3 by the operation of the display changeover switch is set, the maximum A random number (N2) value randomly generated from a numerical value of N2 is stored in the first random number register R1 (step SH4).

  Here, the relationship between N1 and N2 is N1> N2, for example, N1 is “10” corresponding to the ten types of touch patterns consisting of patterns (1) to (10) as described above, N2 is a smaller value, for example “4”. Therefore, in this example, when the slide show mode is set, any value in the range of “1” to “10” is set in the first random number register R1 by the process in step SH3. . However, when the slide show mode is not set (when the manual mode is set), the processing in step SH4 causes the maximum value to be in the range of “1” to “4”, which is smaller than in the case of step SH3. Any value is set in the first random number register R1.

  In step SH5 following step SH3 or step SH4, a writing pattern is set based on the value of the first random number register R1. In other words, as described above, the ROM 12 takes into account the painter's artistic styles such as Van Gogh, Monet, Picasso, etc., or oil painting, watercolor painting, pastel painting, pencil painting, crayon painting, illustration painting. In addition, ten types of writing patterns, patterns (1) to (10), which take into account the painting for each type of picture such as dot drawing and airbrush painting, are stored. Therefore, one of the corresponding value patterns (1) to (10) is selected based on the value of the first random number register R1.

  At this time, if the slide show mode is set, a random number having a maximum value of N1 (= 10) is used in step SH3. If the slide show mode is set, the maximum value is set to N2 (in step SH3). = 4) is used, and N1> N2. Accordingly, when the slide show mode is not set, only one of the four types of brush patterns is selected, whereas when the slide show mode is set, the ten types of brush patterns are selected. Either one is selected. Therefore, there are more types of stroke patterns when the slide show mode is set than types of stroke patterns when the slide show mode is not set.

  Next, the data of the display area 131 display image is copied to the original image area 132 (step SH6). Therefore, as a result of the processing in step SH6, the display area 131 and the original image area 132 are composed of n rows and m columns as shown in FIG. 13, and the first pixel (dot) P (0) to the last one. The image data of the same image composed of n × m pixels up to the pixel P (n × m) is stored.

  Next, the start pixel P of the conversion original image stored in the original image area 132 is designated (step SH7). The designation of the start pixel P is preferably a pixel close to the first pixel P (0) or the first pixel P (0).

  Subsequently, it is determined whether or not the slide flag SLDF = 1 (step SH8). When SLDF = 1 and the slide show mode is set, a random number (N3) value randomly generated from a numerical value having a maximum value of N3 is stored in the second random number register R2. (Step SH9). When SLDF = 0 and the slide show mode is not set, that is, when changing the display of the image displayed on the liquid crystal display panel 3 by operating the display changeover switch, the maximum value starts from a numerical value of N4. The random number (N4) value generated randomly is stored in the second random number register R2 (step SH10).

  Here, the relationship between N3 and N4 is N3 <N4, for example, N3 = 10 and N4 = 30. The value set in the second random number register R2 in the steps SH9 and SH10 indicates the pixel interval when the tone conversion is performed with the selected writing pattern. If the value is small, the interval is shorter in the image. Every time the tone conversion is performed with the brush pattern, a tone conversion image with a high degree of conversion, that is, a tone conversion image with a high conversion rate for the image is generated. On the contrary, if the value is large, the image tone conversion is performed with the stroke pattern at every longer interval in the image, and the image tone conversion image with a low conversion degree is generated.

  Therefore, when SLDF = 1 and the slide show mode is set, the tone conversion with the brush pattern is performed at a higher frequency so that a tone conversion image with a high conversion rate is generated. Set a random number.

  Then, in step SH11 of FIG. 12 following step SH9 or step SH10, the color Cp of the pixel P of the original image area 132 designated in step SH7 is acquired. Therefore, as shown in FIG. 14A, if P1 is a pixel corresponding to P in the image data in the original image area 132, the color Cp of the pixel P1 is acquired. Also, an initial value “1” is set as the value of the counter n for counting the processed pixels in the brush pattern (step SH12).

  Next, in the display area 131, the pixel corresponding to P is matched with the first pixel of the selected brush pattern (step SH13). That is, for example, as shown in FIG. 14B, in the image data in the display area 131, P1 is a pixel corresponding to P, and the stroke pattern (1) shown in FIG. 2A is selected. Suppose that In this case, as shown in FIG. 14B, the pixel “1” in the writing pattern (1) is aligned with the pixel P1.

  Subsequently, a pixel corresponding to the nth pixel in the brushstroke pattern in the display area 131 is searched (step SH14). In other words, if the current time is n = 1, a pixel corresponding to “1” is searched for in the writing pattern (1) shown in FIG.

  It is determined whether or not the searched pixel is within the display area 131 (step SH15). If it is within the display area 131, the color of the searched pixel is changed to Cp (step SH16). Also, the value of n is counted up (step SH17), and it is determined whether or not the value of n is equal to or greater than the final pixel number of the selected brush pattern (step SH18), and the final pixel number of the brush pattern is determined. Steps SH14 to SH18 are repeated until ≦ n.

  In this example, the stroke pattern (1) is selected, and the stroke pattern (1) is composed of 10 pixels “1” to “10”, and the final number of pixels is “10”. . Accordingly, the processing of step SH14 to step SH18 is repeated 10 times, and as a result, as shown in FIG. 14C, the pixels “1” to “10” corresponding to the stroke pattern (1) in the display area 131 are displayed. The color is changed to Cp (the color of the pixel P1).

  Next, the random number R2 is added to the current value of P to update the value of P (step SH19). Further, it is determined whether or not the position indicated by the updated value P exceeds the final position of the pixel in the image data in the display area 131 (step SH20). If not, the process from step SH11 is executed again.

  In step SH11, the color Cp of the pixel P in the original image area 132 is acquired based on the value of P updated in step SH19. Therefore, as shown in FIG. 15A, if P2 is a pixel corresponding to the current P in the image data in the original image area 132, the color Cp of the pixel P2 is acquired. Also, an initial value “1” is set as the value of the counter n for counting the processed pixels in the brush pattern (step SH12).

  Next, in the display area 131, the pixel corresponding to P is matched with the first pixel of the selected brush pattern (step SH13). That is, for example, as shown in FIG. 15B, it is assumed that P2 is a pixel corresponding to P in the image data in the display area 131, and the stroke pattern (1) is selected. In this case, as shown in FIG. 15B, the pixel “1” in the writing pattern (1) is aligned with the pixel P2.

  Subsequently, a pixel corresponding to the nth pixel in the brushstroke pattern in the display area 131 is searched (step SH14), and it is determined whether or not the searched pixel is in the display area 131 (step SH15). If it is within the display area 131, the color of the searched pixel is changed to Cp (step SH16). Also, the value of n is counted up (step SH17), and it is determined whether or not the value of n is equal to or greater than the final pixel number of the selected brush pattern (step SH18), and the final pixel number of the brush pattern is determined. Steps SH14 to SH18 are repeated until ≦ n.

  Accordingly, the processing from step SH14 to step SH18 is repeated 10 times in the same manner as described above, and as a result, as shown in FIG. 15C, the pixels “1” to “1” corresponding to the stroke pattern (1) in the display area 131 The color “10” is changed to Cp (the color of the pixel P2).

  At this time, if the value set in the second random number register R2 in step SH9 is small, the tone conversion is performed with the brush pattern at shorter intervals in the image. For example, the pixel “5” in FIG. “6”, a part of the pixels changed to the color of P1 last time may be changed to the color of P2 this time, so that it is possible to generate a tone conversion image with a high conversion rate. it can.

Next, the random number R2 is added to the current value of P to update the value of P (step SH19).
At this time, as described in steps SH8 to SH10, the relationship between N3 and N4 is N3 <N4, and when the slide show mode is set, a random number R2 having a small maximum value is set. . Therefore, the change width of P in the slide show mode is smaller than that in the manual mode. As a result, when the slide show mode is set, many image tone conversions are performed with high frequency for one image, and the conversion rate for the image is high.

  Therefore, even if there is a limit to the number of images that are sequentially read from the memory card 60 and switched and displayed on the liquid crystal display panel 3, it is possible to continue to display images with different image tones while switching by the slide show function.

  In addition, since there are more types of brushstroke patterns selected in the slide show mode than in the manual mode, it is possible to perform a slide show display while switching images with even different tone.

  As a result, the user is not bored with the image viewing at an early stage, and it is possible to improve the interest of the image viewing with the slide show function.

  Then, as described above, in step SH20, it is determined whether or not the position indicated by the value P exceeds the final position of the pixel in the image data in the display area 131. If exceeded, the tone conversion for the image at the conversion rate that has been selected and the set conversion rate has been completed, so the conversion flag HF is reset (← 0) and the process returns.

  In the present embodiment, an image stored in the memory card 60 is displayed. However, the present invention is not limited to this. An image stored in advance in the internal memory 14 or a content server via the network 90 is used. It may be an image stored in another storage medium such as an image downloaded from 50 and stored in the RAM 12 or the internal memory 14.

  In the present embodiment, the conversion processing shown in the flowcharts of FIGS. 11 and 12 is performed. However, the conversion processing is not limited to this, and any other algorithm such as another tone conversion algorithm is used. Also good. Also, the types and number of writing patterns are not limited to those shown in the embodiment.

  Further, in the embodiment, when the slide show mode is set, more brush patterns can be selected at random and the conversion rate is higher than when the manual mode is set. However, only one of them, that is, the number of selectable brush patterns is the same and the conversion rate is increased, or the number of selectable brush patterns is increased and the conversion rate may be the same.

DESCRIPTION OF SYMBOLS 1 Image display apparatus 3 Liquid crystal display panel 11 CPU
12 RAM
12 ROM
13 RAM
DESCRIPTION OF SYMBOLS 14 Internal memory 16 Display control part 17 Key input control part 18 Memory card interface 21 Key input part 60 Memory card 70 Imaging device 80 Power supply control part 90 Network 131 Display area 132 Original image area 133 Brush pattern area 200 Painting conversion engine

Claims (7)

Image storage means for storing a plurality of images;
First image reading means for reading at least one image from a plurality of images stored by the image storage means;
Second image reading means for sequentially reading the images stored in the image storage means and repeating the reading operation;
Each time an image is read out by one of the first and second image reading means, one conversion parameter is selected from a plurality of conversion parameters, and when the first image reading means reads the conversion parameter, the second image reading means Parameter reading means for changing the number of conversion parameters to be selected according to the case of reading by the image reading means;
Tone conversion means for converting the tone of the read image with a conversion degree based on the selected conversion parameter;
Display control means for displaying on the display means an image whose tone has been converted by the tone conversion means;
An image display device comprising: The image display device further includes parameter storage means for storing a plurality of different conversion parameters,
The parameter reading means selects and reads one conversion parameter from among a plurality of conversion parameters stored in the parameter storage means every time an image is read by any one of the first and second image reading means. The image display device according to claim 1.   3. The image display according to claim 2, wherein the parameter reading unit reads one conversion parameter randomly from among the plurality of conversion parameters stored in the parameter storage unit. apparatus.   The parameter reading means increases the number of conversion parameters to be selected from the parameter storage means when reading by the second image reading means compared to reading by the first image reading means. The image display device according to claim 3.   The parameter storage means stores a plurality of types of parameters representing a brush pattern as conversion parameters, and the image tone conversion means converts the read image into a painting tone based on the brush pattern. Image display device. An image display method in an image display device having an image storage means for storing a plurality of images,
A first image reading step of reading at least one image from a plurality of images stored by the image storage means;
A second image reading step of sequentially reading the images stored in the image storage means and repeating the reading operation;
Each time an image is read in any of the first and second image reading steps, one conversion parameter is selected from a plurality of conversion parameters, and the second image reading step and the second image reading step are selected. A parameter reading step for changing the number of conversion parameters to be selected in the case of reading in the image reading step;
A tone conversion step of converting the tone of the read image with a conversion degree based on the selected conversion parameter;
A display control step for displaying on the display means the image whose tone has been converted in this tone conversion step;
An image display method including: In a computer used as an image display device having image storage means for storing a plurality of images,
A first image reading step of reading at least one image from a plurality of images stored by the image storage means;
A second image reading step of sequentially reading the images stored in the image storage means and repeating the reading operation;
Each time an image is read in any of the first and second image reading steps, one conversion parameter is selected from a plurality of conversion parameters, and the second image reading step and the second image reading step are selected. A parameter reading step for changing the number of conversion parameters to be selected in the case of reading in the image reading step;
A tone conversion step of converting the tone of the read image with a conversion degree based on the selected conversion parameter;
A display control step for displaying on the display means the image whose tone has been converted in this tone conversion step;
An image display control program for executing

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