JP2015222896A - Color adjustment device and color adjustment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color adjustment device capable of easily performing adjustment to the desired color of a user in a short time and a color adjustment method.SOLUTION: A color adjustment device 20 is a device for adjusting the color of an image displayed on a display medium such as a projector 30, displays color information which is a reference on the display medium on the basis of an image signal outputted from an output medium such as a PC 10, and adjusts the color space of the output medium on the basis of color information selected by a user from the color information, to output a color adjustment result desired by the user from the output medium.

Description

  The present invention relates to a color adjustment device and a color adjustment method for adjusting the color of an image.

  In recent years, images and videos reproduced by a personal computer (hereinafter referred to as a PC) or a Blu-ray player are displayed on a projector, a large display, etc., and are widely used for applications such as conferences, presentations, and home theaters. However, when displaying by connecting to various display media from the terminal owned by the user in this way, due to the difference in display characteristics and display environment of each device, the appearance of the actual image and the displayed image is greatly different. May end up. Due to such apparent color differences, visibility may be lowered, affecting information acquisition, and color expression desired by the user may not be achieved.

  Therefore, a method is known in which the difference in appearance is filled by adjusting the color of the image to be displayed. For example, Patent Document 1 discloses a technique in which a user performs color adjustment according to an environment before use by having an adjustment function and a color adjustment screen used for adjustment inside the display medium. Patent Documents 2 and 3 disclose techniques for performing color adjustment without the user specifying hue, saturation, and brightness.

JP 2006-215146 A JP 2006-293087 A JP 2008-046536 A

  According to the above prior art, it is possible to change the display color according to the user's preference and viewing environment before a presentation or the like. However, in the method of Patent Document 1, only the adjustment of each color can be performed, and there is a possibility that the color expression is insufficient. In addition, since adjustment is performed in each of the three-dimensional color spaces, it is possible to focus on image quality, but adjustment time is required. In the method of Patent Document 2, since a plurality of results are displayed side by side, the one close to the user's feeling is selected, so that a memory must be held inside, resulting in an increase in cost. In the method of Patent Document 3, the user does not need to adjust the parameters, but the user's favorite color cannot be expressed. Further, it is necessary to attach an image sensor to the projector for adjustment.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a color adjustment apparatus and a color adjustment method capable of easily adjusting a color desired by a user in a short time in order to solve the above problems.

  In order to solve the above problems, a color adjustment device according to an embodiment of the present invention is a color adjustment device that performs color adjustment on an image displayed on a display medium, and is based on an image signal output from an output medium. Display the color information on the display medium, and adjust the color space of the output medium based on the color information selected by the user from the color information, thereby obtaining the color adjustment result desired by the user from the output medium. Output.

  Specifically, a signal separation unit that separates a data enable signal from an image signal output from the output medium, and a horizontal coordinate and a vertical coordinate on the display medium based on the data enable signal separated by the signal separation unit. A coordinate calculation unit for calculating the reference image, a coordinate offset unit for calculating a reference image display area based on the horizontal and vertical coordinates calculated by the coordinate calculation unit, and a reference image display area calculated by the coordinate offset unit. A reference image display unit that generates a predetermined number of reference images to be displayed on the display medium, and color information based on selection information indicating a reference image selected by the user from the predetermined number of reference images displayed on the display medium. A control unit for calculating correction information; an image signal output from the output medium; A selection unit that selectively switches the reference image generated by the reference image display unit and outputs image data; and the image data output from the selection unit based on the color correction information calculated by the control unit. And a color correction unit for correcting color tone.

  Further, the predetermined number of reference images may include an image obtained by performing color correction on the reference image.

  In order to solve the above problem, a color adjustment method according to an embodiment of the present invention is a color adjustment method for color-adjusting an image displayed on a display medium, and is based on an image signal output from an output medium. Color information as a reference is displayed on the display medium, and the color space desired by the user is adjusted from the output medium by adjusting the color space of the output medium based on the color information selected by the user from the color information. Output the result.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide the color adjustment apparatus and color adjustment method which can be easily adjusted to a user's desired color in a short time.

It is a figure which shows the usage example of the color adjustment apparatus in embodiment of this invention. It is a block diagram which shows the structure of the color adjustment apparatus in embodiment of this invention. It is a flowchart which shows operation | movement of the color adjustment apparatus in embodiment of this invention. It is a figure which shows the relationship between the coordinate on the display screen in embodiment of this invention, and the coordinate in a reference image display area. It is a figure for demonstrating that the image close | similar to several types of references is linked | related with the reference image display area in embodiment of this invention. It is a figure which shows the specific example 1 of the reference image display area in embodiment of this invention. It is a figure which shows the specific example 2 of the reference image display area in embodiment of this invention. It is a figure which shows the specific example 3 of the reference image display area in embodiment of this invention. It is a figure which shows the specific example 4 of the reference image display area in embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The drawings relating to the structure are schematic and different from the actual ones. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings is contained.

(Example of use)
FIG. 1 is a diagram illustrating a usage example of the color adjustment apparatus 20 according to the embodiment of the present invention. As shown in this figure, a color adjusting device 20 is connected between the PC 10 and the projector 30. Here, it is assumed that the presentation material stored in the PC 10 is projected on the display screen 40 such as a large screen by the projector 30 and color adjustment is performed before the presentation.

  The PC 10 is an example of an output medium that outputs an image, and includes a display 11, a keyboard 12, a mouse 13, and the like. Hereinafter, the keyboard 12 and the mouse 13 are collectively referred to as an “input unit”. The color adjusting device 20 adjusts the color of the image signal output from the PC 10 and outputs the image signal to the projector 30. The projector 30 is an example of a display medium that displays an image, and projects an image of a presentation material and a reference image for color adjustment on a display screen 40 such as a large screen. The user adjusts the color of the display screen 40 by operating the input unit 12 (13) of the PC 10 while viewing the reference image displayed on the display screen 40.

  Here, although the color adjustment device 20 separate from the PC 10 and the projector 30 is illustrated, the present invention is not limited to this. For example, the color adjustment device 20 can be realized as a color adjustment circuit mounted on the main body of the PC 10.

  Further, although the PC 10 is illustrated as an output medium and the projector 30 is illustrated as a display medium, the present invention is not limited to this. For example, a tablet, a Blu-ray player, or the like may be employed as the output medium instead of the PC 10, or a large display or the like may be employed as the display medium instead of the projector 30.

(Constitution)
FIG. 2 is a block diagram showing the configuration of the color adjustment apparatus 20 according to the embodiment of the present invention. The color adjustment apparatus 20 includes a signal separation unit 21, a coordinate calculation unit 22, a coordinate offset unit 23, a reference image display unit 24, a control unit 25, a selection unit 26, and a color correction unit 27.

  The signal separation unit 21 supplies the image signal output from the PC 10 to the selection unit 26, separates the data enable signal from the image signal output from the PC 10, and sends it to the coordinate calculation unit 22. The data enable signal is a signal indicating the valid period of the image signal. The coordinate calculation unit 22 calculates horizontal coordinates and vertical coordinates on the display screen 40 from the data enable signal separated by the signal separation unit 21 and sends them to the coordinate offset unit 23. The coordinate offset unit 23 calculates the reference image display area 50 from the horizontal coordinates and the vertical coordinates sent from the coordinate calculation unit 22 and sends them to the reference image display unit 24. The reference image display unit 24 generates a reference image from the reference image display region 50 transmitted from the coordinate offset unit 23 and the reference color information calculated from the reference image display region 50 and transmits the reference image to the selection unit 26. The input unit 12 (13) sends reference image information (selection information) selected by the user from the reference image displayed on the display screen 40 to the control unit 25. The control unit 25 sends a control signal to each unit, calculates color correction information based on the selection information sent from the input unit 12 (13), and sends it to the color correction unit 27. The selection unit 26 selectively switches between the image signal transmitted from the signal separation unit 21 and the image signal generated by the reference image display unit 24. In other words, the selection unit 26 outputs image data of a normal image, a reference image, or an image obtained by multiplying a normal image and a reference image. The color correction unit 27 performs color tone correction on the image data output from the selection unit 26 based on the color correction information sent from the control unit 25. The projector 30 projects the output signal from the color correction unit 27 on the display screen 40. As a result, the normal image and the reference image are displayed on the same display screen 40.

  In this manner, the signal output from the output medium such as the PC 10 is passed through the color adjustment device 20 and the video is output from the display medium such as the projector 30. When color adjustment is performed, color information close to several types of reference is displayed on the display screen 40. Specifically, several types of colors such as WRGB, images, gray scales, two-dimensional color gradations, and the like are displayed on the display screen 40. Thus, when the user selects a color that he feels is closest to the reference color information or a favorite color, color adjustment is performed using the adjustment parameters associated with the selected color. The adjustment parameter is a parameter for adjusting the color space of the output medium. The adjustment parameter can be obtained from the difference from the color of the output medium to the color to be adjusted. As a result, the color adjustment result desired by the user can be displayed on the display screen 40.

(Operation)
Hereinafter, the operation of the color adjustment apparatus 20 according to the embodiment of the present invention will be described with reference to FIGS.

  First, a normal image signal output from the PC 10 is input to the signal separation unit 21. The signal separation unit 21 separates a data enable signal (hereinafter, 1 is a valid period and 0 is a non-valid period) indicating the valid period of the image signal from the input image signals, and sends it to the coordinate calculation unit 22. At the same time, the input image signal is sent to the selection unit 26 as it is.

  The coordinate calculation unit 22 calculates the horizontal coordinate and the vertical coordinate on the display screen 40 from the data enable signal (FIG. 3, S1). Specifically, as shown in FIG. 4, the horizontal coordinate u on the display screen 40 is calculated by counting the number of data enable signals that are 1 in one cycle in the horizontal direction with the image clock. On the other hand, the vertical coordinate v on the display screen 40 is calculated by counting the number of edges at which the logic of the data enable signal changes from 0 to 1 with one image clock in one period in the vertical direction. When the horizontal coordinate u and the vertical coordinate v are calculated, the coordinate 0 of the display screen 40, that is, the coordinate of (u, v) = (0, 0) is the coordinate from the start point of the known horizontal synchronization signal, It is calculated from the coordinates from the start point of the vertical synchronization signal.

  The horizontal coordinate u and the vertical coordinate v calculated by the coordinate calculation unit 22 are input to the coordinate offset unit 23. The coordinate offset unit 23 calculates reference image display area coordinates from the horizontal coordinates u and the vertical coordinates v (FIG. 3, S2).

  Specifically, the following calculation is performed. In FIG. 4, the hatched area is the reference image display area 50. Here, the horizontal size of the reference image display area 50 is W, and the vertical size is H. The display start position and the sizes W and H of the reference image display area 50 may be provided from the control unit 25, may be arbitrarily set by the user from the input unit 12 (13), or may be fixed values. It may be.

The center of the reference image display area 50 is set to 0, the x-axis is taken on the horizontal axis, and the y-axis is taken on the vertical axis. If the coordinates in the reference image display area 50 are (x, y) and the display start coordinates of the reference image display area 50 at the coordinates (u, v) on the display screen 40 are (u0, v0),
The horizontal coordinate x = u−the offset value of the horizontal coordinate. The vertical coordinate y = v−the offset value of the vertical coordinate. here,
Horizontal coordinate offset value = u0 + W / 2
Vertical coordinate offset value = v0 + H / 2
It is. In this way, the coordinates (u, v) on the display screen 40 are converted into coordinates (x, y) having the center of the reference image display area 50 as the origin.

  The reference image display unit 24 performs the following processing to display images close to several types of references in the reference image display area 50. That is, as shown in FIG. 5, the reference image display area 50 is divided into three divided areas 50a, 50b, and 50c from the coordinates x and y and the sizes W and H of the reference image display area 50, and each divided area is divided. The images associated with 50a, 50b, and 50c are displayed (FIG. 3, S3 → S4). The number of divisions of the reference image display area 50 and the images associated with the divided areas 50a, 50b, and 50c may be given from the control unit 25 or may be fixed values. The images associated with the divided regions 50a, 50b, and 50c are images that have been color-corrected with respect to the reference image (images that are slightly different), and the color correction information for each image is associated by the control unit 25. It is assumed that

  The user selects a desired image from several types of displayed images from the input unit 12 (13) (FIG. 3, S5). Based on the selection information from the input unit 12 (13), the control unit 25 calculates color correction information associated with the selected image and sends it to the color correction unit 27 (FIG. 3, S6). Thus, color correction is performed based on the color correction information, and the result of the color correction is displayed on the display screen 40 (FIG. 3, S7 → S8).

  This completes the color adjustment (FIG. 3, S9: NO). If there is another reference image (FIG. 3, S9: YES), an image that has been subjected to color correction for the other reference image may be displayed in the divided regions 50a, 50b, and 50c in the same procedure. (FIG. 3, S10 → S1).

(Specific example 1)
FIG. 6 is a diagram illustrating a specific example 1 of the reference image display area 50. As shown in this figure, a plurality of reference image display areas 51W, 51R, 51G, and 51B may be provided.

  The reference image display area 51W is a reference image display area 50 for selecting a desired W (white). In the divided areas 51Wa, 51Wb, and 51Wc of the reference image display area 51W, an image obtained by performing color correction on a reference W (white) image such as a redish white image or a blueish white image. Associated.

  The reference image display area 51R is a reference image display area 50 for selecting a desired R (red). In the divided areas 51Ra, 51Rb, and 51Rc of the reference image display area 51R, an image obtained by performing color correction on the reference R (red) image, such as a greenish red image or a blueish red image, is provided. Associated.

  The reference image display area 51G is a reference image display area 50 for selecting a desired G (green). In the divided areas 51Ga, 51Gb, 51Gc of the reference image display area 51G, an image obtained by performing color correction on a reference G (green) image such as a blueish green image or a whiteish green image. Associated.

  The reference image display area 51B is a reference image display area 50 for selecting a desired B (blue). In the divided areas 51Ba, 51Bb, and 51Bc of the reference image display area 51B, an image obtained by performing color correction on the reference B (blue) image, such as a whiteish blue image or a redish blue image, is provided. Associated.

(Specific example 2)
FIG. 7 is a diagram illustrating a specific example 2 of the reference image display area 50. As shown in this figure, a two-dimensional color gradation reference image display area 52 may be provided. The divided areas 52a, 52b, and 52c of the reference image display area 52 are associated with an image that has been subjected to color correction on a two-dimensional color gradation image, such as a red shade image or a blue shade image.

(Specific example 3)
FIG. 8 is a diagram illustrating a specific example 3 of the reference image display area 50. As shown in this figure, a landscape reference image display area 53 may be provided. In the reference image display area 53, the divided areas 53a, 53b, and 53c are associated with an image in which color correction is performed on a landscape image such as a redish landscape image or a blueish landscape image.

(Specific example 4)
FIG. 9 is a diagram illustrating a specific example 4 of the reference image display area 50. As shown in this figure, a reference image display area 54 divided into five parts may be provided. In the divided areas 54a, 54b, 54c, 54d, and 54e of the reference image display area 54, color correction is performed on an image of a reference color such as a redish image, a greenish image, a blueish image, a whitish image, or a blackish image. Are associated with each other.

  As described above, the color adjustment device 20 according to the embodiment of the present invention is a device that performs color adjustment on an image displayed on a display medium such as the projector 30, and is based on an image signal output from an output medium such as the PC 10. The reference color information is displayed on the display medium, and the color space of the output medium is adjusted based on the color information selected by the user from the color information. Output. As a result, it is possible to easily adjust the color desired by the user in a short time.

  Specifically, the horizontal and vertical coordinates on the display medium are determined based on the signal separation unit 21 that separates the data enable signal from the image signal output from the output medium and the data enable signal separated by the signal separation unit 21. The coordinate calculation unit 22 to be calculated, the coordinate offset unit 23 to calculate the reference image display region 50 based on the horizontal coordinate and the vertical coordinate calculated by the coordinate calculation unit 22, and the reference image display region calculated by the coordinate offset unit 23 50 based on the reference image display unit 24 for generating a predetermined number of reference images to be displayed on the display medium, and selection information indicating the reference image selected by the user from the predetermined number of reference images displayed on the display medium. A control unit 25 for calculating color correction information, and an image signal output from the output medium A selection unit 26 that selectively switches the reference image generated by the reference image display unit 24 to output image data, and image data output from the selection unit 26 based on the color correction information calculated by the control unit 25. And a color correction unit 27 for correcting the color tone. Thus, it is possible to easily adjust the color desired by the user in a short time simply by selecting a desired reference image from a predetermined number (for example, several types) of reference images displayed on the display medium.

  In addition, the predetermined number of reference images includes images obtained by performing color correction on the reference images. Thus, even a user who does not have knowledge of color adjustment can express a user's favorite color or a color close to the reference display color in a short time.

  The present invention can be realized not only as the color adjustment device 20 but also as a color adjustment method using the characteristic processing unit included in the color adjustment device 20 as steps, or causing a computer to execute these steps. It can also be realized as a color adjustment program. It goes without saying that such a program can be distributed via a recording medium such as a CD-ROM or a transmission medium such as the Internet.

(Other embodiments)
While embodiments of the invention have been described, the discussion and drawings that form part of this disclosure are illustrative and should not be construed as limiting the invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

10 PC (output medium)
DESCRIPTION OF SYMBOLS 12 Input part 13 Input part 20 Color adjustment apparatus 21 Signal separation part 22 Coordinate calculation part 23 Coordinate offset part 24 Reference image display part 25 Control part 26 Selection part 27 Color correction part 30 Projector (display medium)
40 Display screen 50 Reference image display area

Claims (4)

A color adjustment device for color-adjusting an image displayed on a display medium,
By displaying reference color information on the display medium based on the image signal output from the output medium, and adjusting the color space of the output medium based on the color information selected by the user from the color information. A color adjustment apparatus for outputting a color adjustment result desired by a user from the output medium. A signal separation unit for separating a data enable signal from an image signal output from the output medium;
A coordinate calculation unit for calculating horizontal and vertical coordinates on the display medium based on the data enable signal separated by the signal separation unit;
A coordinate offset unit for calculating a reference image display area based on the horizontal coordinate and the vertical coordinate calculated by the coordinate calculation unit;
A reference image display unit that generates a predetermined number of reference images to be displayed on the display medium based on the reference image display region calculated by the coordinate offset unit;
A control unit that calculates color correction information based on selection information indicating a reference image selected by the user from a predetermined number of reference images displayed on the display medium;
A selection unit that selectively switches between an image signal output from the output medium and a reference image generated by the reference image display unit, and outputs image data;
The color adjustment apparatus according to claim 1, further comprising: a color correction unit that performs correction related to a color tone on the image data output from the selection unit based on the color correction information calculated by the control unit.   The color adjustment apparatus according to claim 2, wherein the predetermined number of reference images includes an image obtained by performing color correction on the reference image. A color adjustment method for adjusting the color of an image displayed on a display medium,
By displaying reference color information on the display medium based on the image signal output from the output medium, and adjusting the color space of the output medium based on the color information selected by the user from the color information. A color adjustment method for outputting a color adjustment result desired by a user from the output medium.