JP5725271B2 - Color correction system - Google Patents

Description

  The present invention relates to a color correction system, a color correction method, and the like.

  As physiological functions of human eyes, there are chromatic adaptation and light / dark adaptation. For example, an object that looks white under sunlight (color temperature is about 5500K) is initially reddish when viewed under light bulb-colored illumination light (color temperature is about 3000K), but appears white over time. become. This is an example of chromatic adaptation. For example, when you enter a dark movie theater, you can't see your feet at first, but gradually you can see the surroundings. This is an example of light and dark adaptation.

  Due to the physiological function of the eyes, when a photograph of a landscape is taken and the photographed image is viewed at a later date, the photographer may receive an impression different from the stored scenery for the image. In order to eliminate this mismatch of impressions, for example, the imaging apparatus according to the invention of Patent Document 1 performs white balance adjustment in consideration of chromatic adaptation according to the light source at the time of shooting, and acquires an image having the same color as the appearance.

  However, even in such an acquired image, if the system that corrects the color of the display image in the front stage of the display unit (hereinafter also referred to as a color correction system) does not perform correction processing corresponding to the physiological function, It is not possible to convey to the user (users such as display units, viewers) the video as it appears at the time of shooting. This is because the color and illuminance of the display unit vary depending on the installation location, and these factors affect the user's color adaptation and light / dark adaptation.

  Therefore, some recent televisions (an example of a display unit and a color correction system) have a timer and a luminance sensor. For example, there is a type that performs correction considering color adaptation by adjusting the color temperature of a display image by determining whether it is daytime or evening by a timer. In addition, there is a type in which a luminance sensor determines a change in illuminance and adjusts the brightness of a display image to perform correction in consideration of light and dark adaptation.

JP 2006-60650 A

  However, in addition to the color and illuminance of the place where the display unit is installed, there are other factors that affect the physiological function of the human eye and affect the image viewed by the user. For example, not only chromatic adaptation occurs due to the color of the wall that is the background, but also there is a possibility that the contrast of the lightness is affected by the color of the wall and the display image. Further, in an image display device such as a television, there is a possibility that the brightness contrast is affected by the outer frame and the display image. Here, brightness contrast is one of the physiological functions of the eye, and when two colors with different brightness are arranged, a bright color looks brighter and a dark color looks darker.

  For example, in the test image 1000 of FIG. 12A, three sets of four squares of the same color are arranged on a background with gradation (black on the left and white on the right). The first set is four white squares, which are arranged in a horizontal row at the top of the test image 1000. The second set is light gray and is also arranged in a horizontal row in the middle. The third set is dark gray and is arranged in a horizontal row at the bottom. For example, when the leftmost square in the second group (middle stage) is compared with the rightmost square, the color of the rightmost square is felt dark even though they are the same color. In the first set (upper stage), the leftmost square appears whiter, and in the third set (lower stage), the rightmost square gray appears darker. This is an example of brightness contrast.

  If there is an effect of brightness contrast, for example, even if the change in illuminance is determined by a brightness sensor or the like, and the brightness of the image displayed on the display unit is adjusted by the color correction system, the user will have the same appearance as when shooting I don't always feel a color image.

  In addition, since the display unit does not always have a wall as a background, the surrounding color of the display unit (hereinafter referred to as ambient color) may not be uniform. For example, although it is placed in a room with a white wall, the display unit is placed in front of the black light-shielding curtain, and the display unit, black curtain, and white wall may all enter the user's field of view. obtain. In this case, it is an ambient color closer to the display unit that causes a strong brightness contrast in relation to the display image.

  For example, test images 1001 to 1003 in FIG. 12B confirm the appearance of dark gray squares as in the third set (lower stage) in FIG. The square colors (dark gray) of the test images 1001 to 1003 are all the same color. The test image 1001 has a surrounding color of black, and the test image 1003 has a surrounding color of white. When the test image 1001 and the test image 1003 are compared, the square gray of the test image 1003 appears darker due to the influence of brightness contrast.

  Here, in the test image 1002, the surrounding color close to the dark gray square is black and the outer surrounding color is white. At this time, when the dark gray square of the test image 1002 is seen, the white surrounding color also enters the field of view, but the darkness is emphasized like the test image 1003 because the influence of black, which is a closer surrounding color, is large. There is no. That is, it looks similar to the test image 1001.

  If the surrounding color is not uniform and the color correction system cannot grasp the surrounding color that affects the physiological function of the eye, the user does not always feel an image of the same color as the appearance at the time of shooting.

  Furthermore, since the surrounding color of the display unit is not limited to monochrome, there may be effects such as saturation contrast, color relative ratio, and complementary color contrast. Saturation contrast means that when two colors with different saturation are arranged, a bright color with high saturation appears brighter and a turbid color with low saturation appears more turbid. The color relative ratio means that when two colors having different hues are arranged, they appear to approach each other's psychological complementary colors. Complementary color contrast means that when complementary colors are arranged, the saturation is enhanced and the vividness increases. It is also desirable that the color correction system can correct these eye physiological functions.

  The present invention has been made in view of such problems. According to some aspects of the present invention, there is provided a color correction system that includes means for detecting an ambient color and corrects a display image based on the information. The display unit can display an appropriate image that does not depend on the installation environment based on the image data that has been color-corrected by the color correction system (hereinafter also referred to as correction data).

(1) The present invention is a color correction system for causing an image based on correction data obtained by correcting the display color of input image data to be displayed on a display unit, and includes ambient color information that is color information around the display unit. Ambient color detecting means for detecting, and parameter computing means for computing parameters necessary for correcting the display color of the input image data based on the ambient color information.

  According to the present invention, the parameter calculation means calculates parameters necessary for correcting the input image data based on the surrounding color information detected by the surrounding color detection means. The parameter is calculated based on ambient color information that easily affects the physiological function of the eye such as brightness contrast, and the display color of the input image data is corrected by the parameter. Therefore, it is possible to display an appropriate image regardless of the installation environment of the display unit.

  Here, an appropriate image is an image having an image quality (for example, color / image) that the photographer, creator, sender, or provider of the image wants to convey. For example, it is an image that gives a sense of realism, an image that makes a user feel the vividness of a hue as seen with the naked eye, and an image that makes a user feel comfortable. The sensory expression is an image that makes the viewer feel the video / image intended by the photographer, creator, sender, or provider of the image. As another aspect, an appropriate image is an image having an image quality that is easy for a user to see. For example, an image that does not get tired when viewed, an image with a natural hue, and the like. Of course, the image may be an image having all or some of these, and other elements (for example, excellent representation of dark parts, low power consumption by brightness adjustment, long life of the backlight, etc.) May be included.

(2) The color correction system includes a distance detection unit that detects ambient distance information that is a distance between the display unit and its surroundings, and the parameter calculation unit is based on the ambient color information and the ambient distance information. The parameter may be calculated.

  According to the present invention, when the surrounding color is not uniform, whether or not a specific color in the surrounding causes lightness contrast, saturation contrast, color relative ratio, complementary color contrast, etc. Since the parameter is calculated in consideration of (distance information), a more appropriate image can be displayed. At this time, the distance detection means may measure the distance to an object or the like around the display unit by a method using light or sound waves, for example. Further, the distance detection means may obtain a distance to a surrounding object or the like by calculation based on the received information. This information may be acquired within the color correction system or may be input from outside the color correction system.

(3) In this color correction system, the distance detection unit may detect the ambient distance information based on an image including the display unit and its surroundings.

  According to the present invention, since the surrounding distance information can be measured based on an image including the display unit and its surroundings using coordinates on the image, the accuracy of the surrounding distance information can be improved. The detection of the ambient distance information includes not only the measurement but also obtaining the ambient distance information by calculation.

(4) In this color correction system, an imaging unit is provided, and the imaging unit captures a surrounding detection image that is an image including the display unit and its surroundings when a user performs a predetermined operation. The surrounding color detection means may detect the surrounding color information based on the surrounding detection image, and the parameter calculation means may calculate the parameter based on at least the surrounding color information.

  According to the present invention, the imaging unit captures a surrounding detection image by a predetermined operation such as a user pressing a button. Therefore, it is possible to cause the surrounding color detection means to detect the surrounding color information based on the surrounding detection image acquired at a timing desired by the user. Thereby, even if the surrounding environment changes, the color correction system can respond immediately.

(5) In this color correction system, at least the imaging unit, the surrounding color detection unit, and the parameter calculation unit may be provided in a remote controller.

  According to the present invention, since the imaging unit is provided in the remote controller, it is possible to capture an image including the display unit and its surroundings from the user's viewpoint. Therefore, since the parameter can be calculated using the image as seen by the user, more appropriate color correction can be performed.

(6) The color correction system includes a storage unit that stores information on the outer frame of the display unit including at least color information, and the parameter calculation unit calculates the parameter based on the information on the outer frame. Also good.

  According to the present invention, effective color correction is performed using information on the outer frame of the display unit that is close to the display image and has a high possibility of affecting the brightness contrast, the saturation contrast, the color relative ratio, the complementary color contrast, and the like. be able to. At this time, among the information about the outer frame of the display unit, the color information determined at the time of manufacture can be stored in the storage means in advance, so it is not necessary to extract from the surrounding detection image etc. The color correction based on can be performed immediately.

(7) The present invention is a color correction system for displaying an image based on correction data obtained by correcting the display color of input image data on a display unit, and the input image is based on information on an outer frame of the display unit. Parameter calculation means for calculating parameters necessary for correcting the display color of data is provided.

  According to the present invention, effective color correction is performed using only information on the outer frame of the display unit that is close to the display image and is likely to affect the brightness contrast, the saturation contrast, the color relative ratio, the complementary color contrast, and the like. Necessary parameters can be calculated. For example, in a product with a uniform design such as the color and width of the outer frame, the information of the outer frame is uniquely determined. In such a case, the parameter calculation means may perform calculation using the information of the fixed outer frame. Such information can be incorporated at the time of product shipment.

(8) The color correction system may include storage means for storing information on the outer frame including at least color information, and the parameter calculation means may calculate the parameter based on the information on the outer frame.

  The present invention is also necessary for effective color correction using only the information on the outer frame of the display portion that is close to the display image and is likely to affect the brightness contrast, the saturation contrast, the color relative ratio, the complementary color contrast, and the like. Parameters can be calculated. Even if the color of the outer frame of the product including the display unit has variations, the information is stored in the storage means in advance, so it is possible to calculate suitable parameters without obtaining a separate image for surrounding detection. It is.

(9) The color correction system may include selection input means corresponding to information on the outer frame including at least color information, and the parameter calculation unit may calculate the parameter based on the information on the outer frame. .

  The present invention is also necessary for effective color correction using only the information on the outer frame of the display portion that is close to the display image and is likely to affect the brightness contrast, the saturation contrast, the color relative ratio, the complementary color contrast, and the like. Parameters can be calculated. Even when the color of the outer frame of the product including the display section has variations, the information is transmitted to the parameter calculation means by a selection input means such as a dip switch. Therefore, it is possible to calculate a suitable parameter without separately obtaining a surrounding detection image or the like.

(10) The color correction system may include color correction means for creating the correction data based on the parameters.

  According to the present invention, since the display color of the input image data is corrected based on the surrounding color information that easily affects the physiological function of the eye such as brightness contrast, an appropriate image independent of the installation environment of the display unit can be obtained. Can be displayed.

(11) The color correction system includes a display control unit that accepts a user's selection and causes the display unit to display one correction data based on the user's selection from a plurality of candidate data groups that are the correction data. In the color correction means, the candidate data group may be created.

  According to the present invention, the display control means allows the user to select a display image from a plurality of correction data. Although there are individual differences in the physiological functions of the human eye, images that the user likes can be displayed by preparing options.

(12) The present invention is a color correction method for causing an image based on correction data obtained by correcting the display color of input image data to be displayed on a display unit, and includes ambient color information that is color information around the display unit. Detecting, calculating a parameter necessary for correcting the display color of the input image data based on the ambient color information, and creating the correction data based on the parameter.

  According to the present invention, input image data is corrected based on detected ambient color information. Since color correction is performed based on ambient color information that easily affects the physiological function of the eye, such as brightness contrast, an appropriate image can be displayed regardless of the installation environment of the display unit.

1 is a block diagram of a color correction system in a first embodiment. FIG. 2A is a diagram showing a use environment of a television which is a specific example of the first embodiment. FIG. 2B is a rear view of a television as an example of the first embodiment. The block diagram of the color correction system in 2nd Embodiment. The block diagram of the color correction system in the modification of 2nd Embodiment. FIG. 5A to FIG. 5B are diagrams of images including a television and its surroundings as a specific example of the second embodiment. The block diagram of the color correction system in 3rd Embodiment. The figure which shows the selection screen of the television which is a specific example of the color correction system in 3rd Embodiment. The block diagram of the color correction system in 4th Embodiment. The block diagram of the color correction system in the modification of 4th Embodiment. FIG. 10A is a diagram illustrating a projector including a color correction system according to any of the embodiments. FIG. 10B is a diagram illustrating a printer including a color correction system according to any of the embodiments. 5 is a flowchart illustrating a color correction method corresponding to the color correction system according to the first embodiment. FIG. 12A to FIG. 12B are diagrams of brightness contrast test images.

  Embodiments of the present invention will be described below with reference to the drawings.

  The color correction system according to the present invention is not limited to the specific examples in the following embodiments. The color correction system according to the present invention may be a part of various electronic devices such as a television, a portable small terminal, an electronic book, and an electronic poster. Furthermore, the display unit may be any display unit that can reflect the color information corrected by the color correction system according to the present invention until the display image is finally visually recognized by the user. This is because the display unit is not limited to an electronic display device such as a television or a display in order to solve the problem of providing an appropriate image. Therefore, in the following description, the display unit should be interpreted in a broad sense. For example, a projector image displayed on a wall and an image of a paper medium printed by a printer may be included in the display unit. That is, the color correction system according to the present invention may be a part of a projector or a printer.

  Further, the information processing in the color correction system according to the present invention may be software processing specifically realized using a CPU or the like. That is, information processing in the color correction system according to the present invention may be performed by a program that causes a computer to function as ambient color detection means, parameter calculation means, color correction means, distance detection means, and the like.

1. First Embodiment A first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a block diagram of a color correction system 1 of the present embodiment. The color correction system 1 causes the display unit 2 to display an image in which the display color of the input image data 100 is corrected. The color correction system 1 includes ambient color detection means 10, parameter calculation means 15, and color correction means 11.

  The ambient color detection unit 10 detects ambient color information 200 that is color information around the display unit 2. Here, the surroundings refer to images other than the display unit 2 that enter the field of view when the display unit 2 is viewed by the user. The surroundings may refer to the background of the display unit 2 when viewed from the user. However, when the user captures a front image including the display unit 2 in a plane, that is, without considering the depth, the surroundings include the foreground of the display unit 2. That is, the surroundings refer to the background of the display unit 2 from the user's viewpoint or an image in which the background and the foreground are combined. Therefore, the ambient color refers to the color of the background of the display unit 2 or the color of the video that combines the background and the foreground.

  The parameter calculation unit 15 calculates a parameter 105 necessary for correction performed by the color correction unit 11 based on the ambient color information 200. Since necessary information is passed to the color correction unit 11 as the parameter 105, the processing load of the color correction unit 11 is reduced. Further, for example, even if the parameter calculation means 15 and the color correction means 11 are physically arranged apart from each other, it is only necessary to transmit the parameter 105, so compared to the case where the ambient color information 200 is transmitted as it is. The amount of data is small.

  The color correction unit 11 creates correction data 101 by correcting the display color of the input image data 100 based on the parameter 105. The color correction system 1 displays an image based on the correction data 101 on the display unit 2. The color correction unit 11 may be outside the color correction system 1.

  Here, a specific example of the color correction system 1 is a television receiver (hereinafter referred to as a television). The television receives input image data 100 such as a program, includes a data color correction system 1 therein, and has a display unit 2 such as a liquid crystal for displaying an image. Hereinafter, the color correction system 1 of the present embodiment will be described as being part of a television.

  The color correction unit 11 corrects the display color of the input image data 100, but the correction target may be a pixel value or various parameters that determine luminance, saturation, and the like. For example, the pixel value indicates a numerical value possessed by each pixel of an image expressed in YUV or RGB format. For example, the parameters include brightness, color density (color gain), color temperature (white balance), sharpness, and the like. Regarding brightness, gamma adjustment and backlight adjustment in the case of a liquid crystal television may be included.

  The color correction unit 11 may adjust the brightness and color temperature of the display image so as to cancel the influence of brightness contrast. Further, the color correction unit 11 may adjust the color gain and sharpness so as to cancel the influence of the saturation contrast, the color relative ratio, and the complementary color contrast.

  FIG. 2A is a diagram illustrating an environment in which the television 810 including the color correction system 1 of the present embodiment is used. The installation environment of the television is not uniform, and the television 810 may be disposed in front of the wall 811, the window 812, or the curtain 813. In addition, an indoor light 814 or a houseplant 815 may be placed. These factors depend on the distance from the television 810, but may affect the image displayed on the television 810 due to the physiological function of the human eye. The color of the wall 811 also affects the image displayed on the television 810. For example, if the wall 811 is white, the black portion of the display image of the television 810 is likely to appear black for lightness contrast. Conversely, if the wall 811 is close to black, the white portion of the display image is likely to appear white.

  FIG. 2B is a rear view of the television 810 including the color correction system 1 of the present embodiment. As shown in FIG. 2B, for example, a captured image of an imaging device 816 such as a camera provided on the back surface may be input to the ambient color detection unit 10. The imaging device 816 can capture the background of the television 810 that also functions as the image display unit 2, and the ambient color detection unit 10 can acquire the ambient color information 200 from the captured image. This embodiment is effective when the indoor light 814 and the houseplant 815 at the front of the television 810 are sufficiently separated from each other and the elements arranged on the back of the television 810 are dominant as surrounding colors. At this time, the color correction system 1 is connected to a specific event such as when the TV is turned on or when a preset time is reached, and the ambient color information 200 is not required for the user to perform a special operation. Can be obtained.

  For example, when the imaging device 816 updates the ambient color information 200 at regular intervals, the color information of an object that can be the background of the television 810 such as the curtain 813 can be accurately grasped. The color of the wall 811 is the main element of the ambient color information 200 during the daytime, but accurate information can be obtained even when the color of the curtain 813 is the main element of the ambient color information 200 at night when the curtain 813 is used. It can be output to the parameter calculation means 15.

  The imaging device 816 may measure the illuminance. The imaging device 816 may include not only an imaging element but also a luminance sensor. In this case, the color of the wall 811 when the indoor light 814 is used, the color of the wall 811 when the indoor light 814 is not used, the influence of light entering from the window 812, and the like can be reflected in the ambient color information 200. .

  In the color correction system 1 of the present embodiment, the background color of the display unit 2 (that is, the television 810) is detected as ambient color information 200, and the parameter calculation unit 15 calculates parameters necessary for color correction based on the information. I do. The color correction unit 11 corrects the color of the input image data 100 based on the parameter 105. Since the ambient color information 200 is obtained using the image of the imaging device 816 on the back of the television 810, the foreground information of the television 810 is not included, but appropriate according to the ambient color without requiring a special operation from the user Color correction can be performed.

2. Second Embodiment A second embodiment of the present invention will be described with reference to FIGS. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted and a difference is mainly demonstrated.

  FIG. 3 is a block diagram of the color correction system 1A of the present embodiment. The color correction system 1A includes a distance detection unit 12 in addition to the configuration of the first embodiment. The parameter calculation unit 15 calculates a parameter 105 necessary for correcting the color of the input image data 100 based on not only the ambient color information 200 but also the ambient distance information 201 from the distance detection unit 12.

  The distance detection unit 12 measures the distance from the display screen (peripheral distance information) in a part of the periphery based on, for example, an image including the display unit 2 and its periphery. Here, the surrounding part may be a region having a color different from that of the wall 811 such as the curtain 813 or the leaf portion of the houseplant 815 in FIG. Ambient distance information is used to determine whether or not the display image is affected by the physiological function of the user's eyes. Further, when there are a plurality of regions having colors different from those of the wall 811, it is determined based on the surrounding distance information which region causes the influence of the physiological function of the user's eyes on the display image. It is possible.

  FIG. 4 is a block diagram of a color correction system 1B that is a modification of the present embodiment. The present embodiment includes distance detection means 12 that measures ambient distance information based on an image including the display unit 2 and its surroundings.

  The color correction system 1B includes an imaging unit 19. The imaging unit 19 captures an image including the display unit 2 and its surroundings based on the imaging request signal 400. The surrounding color detection unit 10 receives the surrounding detection image 402 captured by the imaging unit 19. The distance detection unit 12 also receives the surrounding detection image 403 captured by the imaging unit 19. Note that the surrounding detection image 402 and the surrounding detection image 403 may be the same image, or may be different images convenient for processing in the surrounding color detection unit 10 and the distance detection unit 12, respectively.

  For example, the imaging unit 19 may be a part of a remote control. In that case, it is possible to take an image including the display unit 2 and its surroundings from the user's viewpoint. Therefore, more accurate color correction can be performed based on the image reflecting the user's appearance. Further, for example, the shooting request signal 400 may be linked to a button on the remote controller. In this case, the user can acquire an image including the display unit 2 and its surroundings at a timing desired by the user.

  Furthermore, the imaging unit 19, the surrounding color detection unit 10, and the parameter calculation unit function 15 included in the range 30 indicated by the dotted line in FIG. 4 may be provided in the remote controller. At this time, the distance detection means 12 may be provided in the remote controller 30. In this case, the remote control has a calculation function, and only the parameter 105 may be transmitted to the color correction means 11 in the television main body, for example. By distributing the processing, the efficiency of the color correction system 1B as a whole can be increased.

  The imaging unit 19 is not limited to the remote controller and may be provided in another device or the like. For example, the imaging unit 19 may be a part of a camera. The camera includes an imaging unit 19 therein, and temporarily stores surrounding detection images 402 and 403 in a memory card. Then, the surrounding color detection unit 10 and the distance detection unit 12 may receive the surrounding detection images 402 and 403 via the memory card. Further, it may be via a cable for transmitting a surrounding detection image instead of via a memory card. Furthermore, the Internet may be used instead of a cable. If the camera also includes the surrounding color detection means 10, the distance detection means 12, and the parameter calculation means 15, the parameter 105, for example, may be transferred instead of the surrounding detection image.

  Moreover, the structure which abbreviate | omitted the distance detection means 12 from FIG. 4 can also be taken. The surrounding color detection unit 10 may detect only the surrounding color information 200 that is the surrounding color information of the display unit 2 based on the surrounding detection image acquired by the imaging unit 19. The configuration in which the distance detecting unit 12 is omitted from FIG. 4 is a simple color which is color correction based on an image including the display unit 2 and its surroundings from the user's viewpoint, but does not need to consider the surrounding distance information. Suitable for correction system.

  FIG. 5A is a diagram illustrating an example of the surrounding detection image 402 or 403 acquired by the imaging unit 19 in the modification of the present embodiment of FIG. In this image, a television 810, a background wall 811, a curtain 813, and a houseplant 815 are shown. The background wall 811 has a gradation in which the upper left side is bright and the lower right side is dark due to the influence of the indoor light 814 in FIG.

  Based on the surrounding detection images 402 and 403 in FIG. 5A, the surrounding color detection unit 10 acquires the surrounding color information 200 of the television 810 and outputs it to the parameter calculation unit 15. However, a plurality of objects are arranged around the television 810. Therefore, it is desirable that the parameter calculation unit 15 also obtains data for determining which color of the object affects the display image. The distance detection unit 12 may measure a horizontal distance on the surrounding detection image 403, for example. Ambient distance information 201 indicating how far a surrounding object or color is from the television 810 along the horizontal axis is measured and output to the parameter calculation means 15.

  In the example of FIG. 5 (A), the parameter calculation means 15 has an influence on the output image because the distance D2 to the curtain 813 is closer than the distance D3 of the foliage plant 815 on the right side of the television 810. It can be judged that it is easy. For example, when the color of the curtain 813 is red, a green color on the right side of the display image tends to cause a complementary color contrast, and color correction such as displaying with reduced saturation may be performed. In the example of FIG. 5A, the parameter calculation means 15 has only a wall 811 on the left side of the television 810 from the end of the image (D1). Here, for example, if the wall 811 is gray near white due to the influence of the indoor light 814, brightness contrast is likely to occur in black on the left side of the display image. Therefore, the parameter calculation unit 15 may generate parameters so that color correction such as increasing the luminance of black on the left side of the display image is performed. Here, the horizontal distance information 210 is illustrated as an example, but the parameter calculator 15 may make the same determination in the vertical direction.

  FIG. 5B shows an example of another method in which the surrounding color detection means 10 and the distance detection means 12 measure the surrounding color information 200 and the surrounding distance information 201 for the same surrounding detection images 402 and 403 as in FIG. It is. As shown in FIG. 5B, areas may be defined as ZONE1, ZONE2, and ZONE3 in order from the display screen of the television 810, and the surrounding color information 200 and the like in each area may be acquired. The distance detection means 12 may determine the number and range of the regions for each surrounding detection image. The ambient color detection unit 10 and the distance detection unit 12 may acquire the ambient color information 200 and the ambient distance information 201 in cooperation using an internal signal (not shown). The parameter calculation means 15 may generate parameters by weighting each region.

3. Third Embodiment A third embodiment of the present invention will be described with reference to FIGS. In addition, about the structure similar to 1st Embodiment or 2nd Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted and a difference is mainly demonstrated.

  FIG. 6 is a block diagram of the color correction system 1C of the present embodiment. The color correction system 1C includes display control means 17 in addition to the configuration of the second embodiment. An input selection signal 300 is input to the display control means 17 from the user. In this embodiment, the color correction unit 11 outputs a candidate data group 102 that is a plurality of correction data to the display control unit 17. The color correction unit 11 may generate the candidate data group 102 by deriving the parameter 105. Further, the color correction unit 11 may receive the parameter 105 corresponding to a plurality of correction data and generate the candidate data group 102. Then, the display control unit 17 displays a thumbnail image of the candidate data group 102 on the display unit 2 or displays an image based on one correction data selected by the user by the input selection signal 300 on the display unit 2. According to this embodiment, unlike the first embodiment or the second embodiment, the user can select a favorite image from a plurality of candidate data. Note that the output data 103 from the display control unit 17 is thumbnail data until the user selects one image, and may be correction data selected after the selection.

  Here, there are cases where the physiological function of a person's eyes varies from person to person, and uniform processing may be difficult. The color correction unit 11 acquires, for example, past statistical data from a storage unit inside or outside the color complementary color system or via a network, and performs appropriate color correction based on the surrounding color information 200 and the surrounding distance information 201. Is possible. However, considering the user's personal preference and the individual differences, it is preferable for the color correction system to allow the user to select a final output image.

  FIG. 7 is a specific example of a selection screen in the television 810 including the color correction system 1C. Each of the first thumbnail 817 and the second thumbnail 818 is a display based on each image data of the candidate data group 102 from the color correction unit 11. In this selection screen, the number of candidates is not limited to two, and the display method may be different from the example of FIG. A selection cursor 819 indicates that the first thumbnail 817 is currently selected based on the input selection signal 300 from the user. For example, the input selection signal 300 from the user may be linked to a button included in the remote controller of the television 810.

  Here, for example, the first thumbnail 817 may be a thumbnail of an image based on correction data obtained according to the tendency of all subjects in the statistical data. For example, the second thumbnail 818 may be a thumbnail of an image based on correction data obtained according to a tendency of a specific target person such as the same age, same sex, and same viewing environment as the user in the statistical data. When the user selects one of the options using, for example, a determination button on the remote controller, an image based on the selected correction data may be displayed on the full screen. According to the color correction system 1C of the present embodiment, by providing the display control unit 17, an interactive function in which the user selects one from a plurality of corrected image options can be realized.

4). Fourth Embodiment A fourth embodiment of the present invention will be described with reference to FIGS. In addition, about the structure similar to 1st-3rd embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted and a difference is mainly demonstrated.

  In the television 810 of FIG. 7, outer frames 820A to 820D exist around the display screen. This is not limited to the television 810, and a general display device has an outer frame around the display portion in order to obtain strength.

  Here, the color of the outer frame is often a single color unrelated to the display image, and there is a possibility that the display image may be affected by brightness contrast, saturation contrast, color relative ratio, complementary color contrast, and the like. In addition, since it is closest to the display image, it is highly likely that the outer frames 820A to 820D have the above influence unless the width of the outer frames 820A to 820D is negligible for the user. Therefore, in this embodiment, color correction is performed in consideration of outer frame information that is information such as the color and width of the outer frame.

  FIG. 8 is a block diagram of the color correction system 1D of the present embodiment. The color correction system 1D includes a storage unit 21 that stores outer frame information 202. The storage unit 21 may be a memory such as a ROM or a flash memory, but is not limited thereto. The outer frame information 202 is preferably written in the storage unit 21 at the time of manufacture or shipment of an electronic device (for example, a television) including the color correction system 1D, for example. However, it may be written after manufacture or after shipment. The color correction means 11 performs color correction based not only on the surrounding color information 200 and the surrounding distance information 201 as in the third embodiment but also on the outer frame information 202. As a result, it is possible to perform color correction in consideration of outer frame information that is highly likely to affect the output image.

  FIG. 9 is a block diagram of a color correction system 1E that is a modification of the present embodiment. This modification realizes a simple and inexpensive color correction system. Since the color of the outer frame can be the ambient color closest to the display image, this has the most influence on the physiological function of the human eye, and it can be considered that the colors of other backgrounds and the like have relatively little influence. In this case, there can be a system configuration in which the surrounding color detection means 10 and the distance detection means 12 are omitted as shown in FIG.

  In the color correction system 1E, the parameter calculation unit 15 calculates the parameter 105 based only on the outer frame information 202A from the selection input unit 22. Here, the selection input means 22 is set corresponding to the information of the outer frame including at least the color information. For example, the selection input means 22 is a dip switch, and a value may be set according to the color of the outer frame at the time of manufacturing or shipping the product including the display unit 2. Depending on the selection input means 22, for example, the value of the outer frame information 202A may be 0 if the color of the outer frame is black, and the value of 202A may be 1 if it is white.

  In this modification, the storage means 21 of FIG. 8 may be used instead of the selection input means 22. Furthermore, for example, when there is only one type of outer frame of the product including the display unit 2, the color correction system 1E may be configured not to include the selection input unit 22 and the other storage unit 21. That is, the parameter 105 or the correction data 101 may be generated without requiring special information. As another example, necessary outer frame information and parameters 105 may be acquired via the Internet.

  In this modification, the imaging device 816 and the imaging unit 19 are not necessary, and an inexpensive color correction system can be configured.

5. Electronic Device An example of an electronic device other than a television including the color correction system according to any of the first to fourth embodiments of the present invention will be described with reference to FIGS. 10 (A) and 10 (B).

  FIG. 10A is a diagram of a projector. In many cases, the image of the projector is projected not only on the white screen but also on the wall surface. In this case, the projected image is affected not only by the overall color of the wall surface (for example, the influence on the brightness of the projected image) but also by the physiological function of the human eye.

  For example, in the left diagram of FIG. 10A, the projector 821A projects an image on a white wall 822A, and in the right diagram of FIG. Projected to 822B. In such a case, for example, the white portion of the image projected on the wall 822B may appear more whitish due to the effect of brightness contrast. In such a case, if color correction is performed by the color correction system according to any one of the first to fourth embodiments, even when projecting on the dark gray wall 822B, it is the same as projecting on the white wall 822A. It is possible to make viewers feel the image.

  FIG. 10B is a diagram of the printer 823. A printed matter such as a poster printed by the printer 823 may be affixed to the white wall 824A as shown in the left diagram of FIG. 10B, or a dark gray color as shown in the right diagram of FIG. 10B. It may be affixed to the wall 824B. In this case, even if the contents of the printed matter are exactly the same, the impression of an image such as a poster may differ depending on the color of the attached wall due to the influence of the physiological function of the human eye. Therefore, for example, the color of the wall to be pasted may be input to the printer 823 as ambient color information, and color correction may be performed by any one of the color correction systems of the first to fourth embodiments included in the printer 823. When color correction is performed, even when the image is applied to the dark gray wall 824B, the viewer can feel the same image as that applied to the white wall 824A.

6). Color Correction Method A color correction method corresponding to the color correction system 1 in the first embodiment will be described with reference to FIG. This color correction method may be realized by hardware such as a color correction circuit, or may be realized by software (computer program).

  FIG. 11 is a flowchart showing the color correction method. First, the color correction system detects ambient color information (S1). Then, parameters necessary for correcting the display color of the input image data are calculated based on the surrounding color information (S2). Thereafter, the correction data is created based on the parameters (S3). The data corrected in this way (correction data) is displayed on the display unit 2.

  The present invention is not limited to these exemplifications, and includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations that have the same functions, methods, and results, or configurations that have the same objects and effects). In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. Further, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

DESCRIPTION OF SYMBOLS 1 ... Color correction system, 1A ... Color correction system, 1B ... Color correction system, 1C ... Color correction system, 1D ... Color correction system, 1E ... Color correction system, 2 ... Display part, 10 ... Ambient color detection means, 11 ... Color correction means, 12 ... Distance detection means, 15 ... Parameter calculation means, 17 ... Display control means, 19 ... Imaging section, 21 ... Storage means, 22 ... Selection input means, 30 ... Remote control, 100 ... Input image data, 101 ... Correction data 102 ... Candidate data group 103 ... Output data 105 ... Parameter 200 ... Ambient color information 201 ... Ambient distance information 202 ... Outer frame information 202A ... Outer frame information 300 ... Input selection signal 400 ... Shooting request signal 402 ... Ambient detection image 403 ... Ambient detection image 810 ... TV receiver 811 ... Wall 812 ... Window 813 ... Curtain 814 Indoor light, 815 ... foliage plant, 816 ... imaging device, 817 ... first thumbnail, 818 ... second thumbnail, 819 ... selection cursor, 820A-820D ... outer frame, 821A-821B ... projector, 822A-822B ... wall , 823 ... Printer, 824A to 824B ... Wall, 1000 to 1003 ... Test image

Claims (7)

A color correction system for displaying an image based on correction data obtained by correcting the display color of input image data on a display unit,
Ambient color detection means for detecting ambient color information which is color information around the display unit;
Parameter computing means for computing parameters necessary for correcting the display color of the input image data based on the ambient color information;
Distance detecting means for detecting ambient distance information, which is a distance between the display unit and its surroundings ;
With
The surrounding color information, only contains the color information of the background of the display unit,
The parameter calculation means is
Calculating the parameter based on the ambient color information and the ambient distance information ;
The distance detecting means includes
Based on the image including the display unit and its surroundings, the surrounding distance information is detected ,
The surrounding distance information is a color correction system including distance information between the display unit and an object in the background of the display unit . The color correction system according to claim 1 .
With an imaging unit,
The imaging unit
When the user performs a predetermined operation, a surrounding detection image that is an image including the display unit and its surroundings is captured,
The ambient color detecting means is
Detecting the surrounding color information based on the surrounding detection image;
The parameter calculation means is
A color correction system that calculates the parameter based on at least the ambient color information. The color correction system according to claim 2 ,
A color correction system in which at least the imaging unit, the surrounding color detection unit, and the parameter calculation unit are provided in a remote controller. The color correction system according to claim 1 or 2 ,
Storage means for storing information on the outer frame of the display unit including at least color information;
The parameter calculation means is
A color correction system that calculates the parameter based on information of the outer frame. The color correction system according to claim 1 or 2 ,
A selection input unit corresponding to information on the outer frame of the display unit including at least color information;
The parameter calculation means is
A color correction system that calculates the parameter based on information of the outer frame. The color correction system according to any one of claims 1 to 5 ,
A color correction system comprising color correction means for creating the correction data based on the parameters. The color correction system according to claim 6 .
A display control unit that accepts a user's selection and displays one correction data on a display unit based on the user's selection from a plurality of candidate data groups that are correction data;
In the color correction means,
A color correction system for creating the candidate data group.