JPS5937918B2 - Color adjustment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color adjustment method for various designs.

In general, for products such as clothing, carpets, and wallpaper where color, pattern, and design are important, determining the color scheme for these various designs is a very important issue.

For example, in the textile printing field, a designer may draw several copies of the same design with only different color schemes, or they may create a mass with various color schemes and then select from among them and move on to production, which results in wasted color schemes. Yes, it takes a lot of time to decide on the color scheme. Therefore, in order to streamline this kind of color scheme consideration, we developed a device whose purpose is to adjust the color scheme without actually making the product or creating a design drawing.
Something has been devised.

There are basically two methods for doing this.The first method is to create disassembled slide plates from photographs and then project them onto a single screen again while adjusting the color of the light source of each plate. 2. After the image captured by a television camera is electrically divided into equal density stages according to its brightness, the three primary colors of red, green, and blue are applied to each division in arbitrary proportions according to the principle of color television. This is a method of mixing and adding colors to display on a color TV. This second method has the advantage of being easy to operate and yielding results immediately, and the present inventors have also discussed this in Japanese Patent Laid-Open Nos. 50-13662, 50-88367, and 50-88367.
0-157652, 50-157653, 50-157
654 and others have proposed similar methods.

In other words, Japanese Patent Application Laid-Open No. 13662/1986 records a video signal captured by a television camera on a magnetic recording medium such as a magnetic tape when producing patterned knitted and woven fabrics, reproduces this signal, and compiles an electrical signal processed by analog-digital exchange. It is used as a control signal for the machine's needle selection mechanism or the device that moves the healds of the loom, and JP-A-50-88367 discloses that when creating pattern information, the shading or hue of the object is determined from the object that is the basis of the pattern. Alternatively, an electric signal corresponding to the unevenness or a combination thereof is extracted as a video signal that can be displayed on a cathode ray tube by electronic scanning, and separately from this, the horizontal and vertical synchronization signals included in the video signal are used as reference timing to detect the object. An extraction instruction signal is created to design a desired part extracted from the video signal corresponding to each part of the video signal, and these two signals are combined and displayed on a cathode ray tube to give the equipment a rational pattern. It gives information. In addition, Japanese Patent Application Laid-Open No. 50-157652 uses analog video signals captured by a television camera to create patterned objects.
The electric signal converted into digital data and recorded in memory is used as a control signal for a device for manufacturing patterned articles.
The 157653 converts video signals captured by a television camera from analog to digital when creating patterned items, and instead of storing them in memory, transmits all the electrical signals for one screen to the mechanism of the patterned item manufacturing equipment connected to it. The electric signal is used as a control signal for the mechanism by fixing the relative position of the TV camera and the object that should be the basis of the handle until the end of the process. This paper proposes a pattern signal generation device in the pattern knitting and woven fabric production process that can rationally express this image on fabric by using the image captured by a television camera of the pattern generation mechanism of the machine. In the second method and the apparatus proposed by the present inventors, the following method is adopted as a method for adjusting the color scheme of the design.

(a) Adjust each value of the three primary colors of red, green, and blue using the dial each time. (b) Each value of the three primary colors red, green, and blue is designated as a digital value using a key each time.

(c) Select and input a card that has recorded the values of the three primary colors red, green, and blue for various colors in advance (d) Input the values of the three primary colors red, green, and blue for various colors Assign a number to the color, record it in memory, and specify the number of that color.

Of the above methods, method (a) is also used in color graphic displays, which are peripheral devices for computers, and allows easy confirmation of changes in color scheme.
Adjustments must be made using a combination of two dials, and it is quite troublesome to faithfully reproduce, for example, the color of dye or the color of colored thread.

Method (b) specifies the color using digital values, so the colors used once are recorded as red, green, and blue values. If you do this, you can always reproduce the P8 color, and methods (c) and (d) allow you to reproduce the color with even simpler operations such as inputting a card and specifying the color number, but all of these methods start with (a). Similar to the above method, it required the troublesome work of matching the actual colors with the colors displayed on a color television. An object of the present invention is to provide a color scheme adjustment method that adjusts colors while comparing the actual colors and the colors displayed on a color TV, as a method for instantly obtaining faithful color reproduction even when using colors for the first time. . In other words, the color adjustment method according to the present invention divides the image taken by a television camera into equal density sections in stages according to its brightness, and then uses a color encoder for each section to divide the images into three primary colors of red, green, and blue. In the color adjustment method in which colors are mixed in arbitrary proportions and displayed on a color cathode ray tube, the actual color sample is separated into the three primary color components of red, green, and blue by the first color separation optical system, and each color is separated into three primary color components: red, green, and blue. A second color separation optical system calculates each output level obtained by applying the light to the first light-receiving section and the color of the division that should be the same as the actual color sample among the equal density divisions displayed on the color cathode ray tube. a servo mechanism that controls the color encoder until the output levels obtained by separating the colors into three primary color components of red, green, and blue and applying them to the second light-receiving section correspond to each other and reach the same value; The method is characterized in that the color of the actual color sample is reproduced on the color cathode ray tube.

Embodiments of the color arrangement adjustment method according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a process diagram for implementing the color adjustment method according to the present invention, FIG. 2 is a detailed process diagram of the color adjustment dial 6 shown in FIG. 1, and FIG. It is a figure showing the composition of the colorimeter in the figure.

In FIG. 1, an original picture 1 is photographed by a television camera 2, and the output analog video signal is divided into equal densities by voltage level with the number of colors specified by an A/D converter 3, and the color is assigned to each division by a gala encoder 4. Turn on RGB
The image is displayed on the input color monitor 5.

As shown in FIG. 3, the control mechanism of the color adjustment dial 6 includes colorimeter devices 9 and 10 that input the actual sample 7 and the color 8 displayed on the color television, and a level comparator for comparing their respective output levels. 11, a servo mechanism 12 whose rotation is controlled by its output, and a classification switch 13 which sets the color classification to be changed. Further, the colorimeter 9 and 10 in FIG. 2 are each constructed as shown in FIG. 3. That is, the color sample 7 or the color 8 displayed on the color television is applied to the red reflective dichroic mirror 16 through the optical system 15. Here, only the red component is reflected and the resulting output level is input to the level comparator 11 via the amplifier 22. The light transmitted through the mirror 16 is applied to the next green reflective dichroic mirror 17.
Here, only the green component is reflected and the resulting output level is input to the level comparator 11 via the amplifier 23. Further, the light transmitted through the mirror 17 has only a blue component, and is totally reflected by the reflecting mirror 18 and applied to the light receiving section 21. The resulting output Vbell is inputted to the output level comparator 11 through the amplifier 24. Next, the operation of the apparatus constructed as shown in FIGS. 1 to 3 will be explained with reference to FIG. 4.

When an original image 1 of a floral pattern is photographed by a television camera 2 and displayed on a color monitor 5, it becomes as shown in FIG. 4a. This is an example of equal density division into four colors, and in Figure 4a, black 31, diagonal line 32
, dotted line 33, and white 34.
Then, in order to clarify the colors of each category, the colors of all the categories used are displayed in a strip shape at the bottom of the glass monitor 5, and further below that, the colors of the categories are displayed. Dial 6 for adjusting colors, 3 for primary colors, 1
Arrange them in groups. For example, adjusting the red dial 6 for section 1 changes the amount of red light only for section 1, and adjusting the green dial 6 for section 2 changes the amount of green light only for section 2. By adjusting each dial 6 in this way, the color encoder 4 can be controlled and the color of each section can be freely changed. FIG. 4b shows an example of color arrangement change. In FIG. 4b, the white portion 34 remains as is, and the portions 31, 32 and 33 in FIG. 4a have been changed in color to portions 31', 32' and 33', respectively, in FIG. 4b. Next, a method for controlling the color adjustment dial 6 of the present invention will be explained.

First, use the category switch 13 to set the category of the color you want to change among the patterns displayed on the color monitor 5.

This division switch 13 is used to switch the set of dials 6 whose rotation is controlled by a servo mechanism. Next, an actual sample 7 of the color desired to be displayed on the color monitor 5 is prepared and the color is measured with the colorimeter 9. Also, among the patterns displayed on the color monitor 5, the colors of the categories set by the category switching device 13 are measured at the same time. The color on the color monitor 5 may be selected from among the displayed patterns, but if the pattern is small, it is better to measure the lower strip-shaped color sample. The colorimeter 9 and 10 used in this case are configured as already explained with reference to FIG. . These amplifiers are used only to compare whether the actual color sample 7 and the color 8 displayed on the color TV are the same color, that is, whether the output levels of each of the three primary color components are the same, so strict correction is not necessary. It is necessary to perform correction so that the output level of the three primary colors in the case of white in the actual color sample 7 matches the output level of the three primary colors in the case of standard white, which is the maximum light intensity of the color monitor 5.〇Output level The comparator 11 compares the output levels of the three primary color components of the color sample 7 and the color 8 displayed on the color TV, and if the latter is low, the color adjustment dial 6 is rotated to the right, if the latter is high, the color adjustment dial 6 is rotated to the left, and so on. The servo mechanism 12 that controls the three dials 6 that change the amount of light is driven to make both values the same. In this way, in the present invention, when changing the color scheme, the color category to be changed is set using the category switching device 13, and the actual color sample 7 of the displayed color is selected by the colorimeter 9.
The operation is as simple as setting the color to the color monitor 5, and since the actual color sample 7 and the color 8 displayed on the color monitor 5 are measured with the same type of colorimeter 9, 10, the wavelength of the colorimeter 9, 10 is Faithful color reproduction is possible without being affected by characteristics. Further, in the present invention, in addition to controlling the rotation of the dial 6, the color adjustment is performed by comparing the output levels of the colorimeter 9 and 10 with A/D converted digital values and controlling the color encoder with the D/A converter. is also possible.

As described in detail above, according to the present invention, the colors of actual color samples can be faithfully and quickly reproduced on a color monitor, and the effect is great in adjusting the color scheme of various designs.

[Brief explanation of the drawing]

FIG. 1 is a process diagram for carrying out the color adjustment method according to the present invention, FIG. 2 is a detailed process diagram of the color adjustment dial 6 shown in FIG. 1, and FIG. FIG. 4 is an external view of the color monitor shown in FIG. 1, showing the configuration of the color device. In the figure, 1 is the original image, 2 is the TV camera, 3 is the A/D converter, 4 is the color encoder, 5 is the color monitor, 6 is the color adjustment dial, 7 is the actual color sample, 8 is the color displayed on the color monitor, 9 and 10 are colorimeter, 11 is an output level comparator, 12 is a servo mechanism, 13 is a division switch, 15 is an optical system, 16 is a red reflective dichroic mirror,
17 is a green reflective dichroic mirror, 18 is a reflective mirror, 1
9, 20, and 21 are light receiving sections, and 22, 23, and 24 are amplifiers.

Claims (1)

[Claims] 1 After dividing the image taken by a television camera into equal density sections according to its brightness, each section is colored by mixing the three primary colors of red, green, and blue in an arbitrary ratio using a color encoder. In the color adjustment method for displaying on a color cathode ray tube, an actual color sample is separated into three primary color components of red, green, and blue by a first color separation optical system, and each of these is separated into three primary color components by a first color separation optical system.
A second color separation optical system converts each output level obtained by applying the output level to the light receiving section of the color cathode ray tube and the color of the same density division displayed on the color cathode ray tube to be the same as the actual color sample. , the servo mechanism for controlling the color encoder is operated until the color separation into the three primary color components of blue and the respective output levels obtained by applying the color to the second light receiving section are compared in correspondence with each other until the two become the same value. , a color arrangement adjustment method characterized in that the color of the actual color sample is reproduced on the color cathode ray tube.