JPS6228637B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color scheme adjustment method, and more particularly to a color scheme adjustment method that allows the color scheme of various designs to be adjusted in an image similar to that of a product.

[Conventional technology]

Colors, like clothing, carpets, wallpaper etc.
For products where patterns and designs are important, determining the color scheme is a very important issue.

For example, in the textile printing field, there are methods in which designers draw several copies of the same design with only different color schemes, or methods in which they make mass cuts using various color schemes. Because of this, some color schemes are wasted, and it takes a lot of time to decide on a color scheme.

Therefore, in order to streamline this kind of color scheme consideration, several methods have been considered that can be done without actually manufacturing the product or creating a design drawing. In principle, there are two methods for these methods: one is to create disassembled slide plates from photographs, etc., and project them onto a single screen again while adjusting the color of the light source of each plate; The other method is to electrically divide the image taken by a television camera into equal density sections according to its brightness, and then, according to the principle of color television, red, green, and blue are divided into three sections for each section. This is a method of adding colors by mixing primary colors in arbitrary proportions and displaying them on color television.

The latter has the advantage that it is easy to operate and results can be obtained immediately.
Publication No. 157652, Japanese Patent Publication No. 157653, Japanese Patent Publication No. 157652, Japanese Patent Publication No. 157652
50-157654 and others have proposed a method similar to the latter method. Also,
The present inventors have also proposed a method of displaying an arbitrary color scheme by operating a knob on an operation panel attached to a color encoder (Japanese Patent Application Laid-Open No. 1983-1989-1).
(See Publication No. 29752).

When adjusting the color scheme of a design using the latter method, each plate or area of equal density is displayed in the same color, so the result is a design that is similar to a design drawn with poster color or the like with less unevenness. It will be done.

[Problem that the invention seeks to solve]

However, for many products where color, pattern, and design are important, unevenness, three-dimensional effect, texture, gloss, blur, etc. are important points, and color schemes must be adjusted on the screen displayed using the latter method. However, since the unevenness, three-dimensional effect, etc. cannot be accurately reproduced, there is a problem in that only a product with an image that is quite different from the desired product can be obtained.

The purpose of the present invention is to improve such conventional problems, and to make it possible to adjust the color scheme to resemble the image of various products.
Another object of the present invention is to provide a color scheme adjustment method for various designs that can quickly reproduce the three primary colors of red, green, and blue in arbitrary proportions on a color monitor.

[Means for solving problems]

In order to achieve the above-mentioned object, the color adjustment method of the present invention adjusts the image taken by the first television camera to
After classifying the density in stages according to the output level, a color encoder is used for each division to create a colored image in which the three primary colors of red, green, and blue are mixed in an arbitrary ratio, and the first color image is colored. An achromatic shaded image photographed by a television camera or a second television camera provided separately, and the three primary colors of red, green, and blue of the color scheme image are reduced by the difference between the shaded image and the maximum output level for one frame of the shaded image. A feature of the present invention is that the color scheme of the image taken by the first television camera can be adjusted to resemble images of various products by synthesizing the image so as to display it on a color cathode ray tube and adjusting the output level of the shaded image. .

[Effect]

In the present invention, as a method of adjusting the color scheme to approximate images of various products, this is achieved by combining analog video signals captured and output by a television camera into a color scheme image. In addition,
Synthesizing various patterns on color television images is often done, for example, at broadcasting stations, but in the present invention, by using this method for color adjustment, it is possible to reduce hue changes before and after composition. We are focusing on what we can do.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a color adjustment device that implements the color adjustment method of the present invention, and FIG. FIG. 3 is a waveform diagram showing changes in signal waveforms at each part of FIG. 2.

In FIG. 1, the configuration consisting of a television camera 2, A/D converter 3, color encoder 4, and color monitor 5 is a configuration that has been implemented in the past, and simply adjusts the color scheme regardless of the product. If so, this part alone is sufficient.
Here, the color encoder 4 is
As shown in Japanese Patent No. 29752, an arbitrary color can be displayed on the color monitor 5 by an operator operating a knob on an operation panel 14 attached to the device. In this embodiment, a second television camera 7, a switching device 8, and a shadow composition circuit 9 are added to this conventional configuration. It adds shine, gloss, blur, etc. Each part will be explained in detail below.

In FIG. 1, an original image 1 is photographed by a television camera 2, and the analog video signal outputted from the television camera 2 is divided into equal density sections according to the voltage level according to the number of colors specified by the A/D converter 3. Each divided section is colored by a color encoder 4 and displayed on a color monitor 5 using an RBG input method. In addition, in order to use the analog video signal output from the television camera 2 as a shadow image, after passing it through the switch 8, signal processing is performed in the shadow synthesis circuit 9, and the color scheme image is superimposed and displayed on the color monitor 5. do. In the switching device 8 and the shadow synthesis circuit 9, no color adjustment is performed at all, but processing is performed to add an image of the product. The output (e) whose color scheme has been adjusted by the color encoder 4 and the output (d) to which the product image has been added by the shading composition circuit 9 are combined and input to the color monitor 5 and displayed.

The switch 8 switches between the first television camera 2 and the second television camera 7. That is, when an actual product is used as the original image 1 for the color scheme image and the shadows of the original image are displayed as they are, the video signal from the television camera 2 is used. On the other hand, when using an original picture drawn in poster color etc. as the original picture 1, unevenness, three-dimensionality, texture, etc.
An original image 6 for a shadow image having gloss, blur, etc. is separately prepared, and a video signal from a television camera 7 is used.

Next, the signal processing method of the shadow synthesis circuit 9 shown in FIG. 1 will be explained with reference to FIGS. 2 and 3.

As shown in FIG. 2, the shadow synthesis circuit 9 includes an output level adjuster 10, a synchronization separation circuit 11, a peak value sampling circuit 12, and an output level synthesis circuit 13. 3A to 3F show signal waveforms of each part of the shadow synthesis circuit 9 in FIG. 2. 3a shows one scanning line of the analog video signal output from the television camera 2 or 7 in FIG. 1, and FIG. 3b shows the output waveform of the output level adjuster 10 in FIG. 2. , Fig. 3 c-1, c is the second
The signal waveforms and output waveforms in the process of the peak value sampling circuit 12 shown in the figure are shown, and d-1 and d in FIG. 3 are the signal waveforms in the process of the output level synthesis circuit 3 in FIG.
3e is the output level waveform for each RGB of the color encoder 4 in FIG. 1, and FIG. Color monitor 5
This is the waveform of the composite image after compositing. In addition, T
is the elapsed time, E and -E are voltage levels in the positive and negative directions, and 0 is the zero level.

First, when an original image 1 or 6 is captured by the television camera 2 or 7 in FIG. 1, a corresponding analog video signal is output from the camera 2 or 7, and one scanning line of these analog video signals is
As shown in FIG. 3a, the signal waveform has high and low levels. A part of this analog video signal is input to the switch 8, and the rest is input to the A/D converter 3. The output signal waveforms of the A/D converter 3 and color encoder 4 are detailed in the above publication, so they are not shown in FIG.
The A/D converter 3 divides the specified number of colors into equal densities according to voltage levels. For example, among the voltage levels of analog video signals, 0 to 0.2V is the first voltage level.
0.2 to 0.4V is divided into the second division, and 0.4 to 0.6V is divided into the third division. When each of those signals divided into equal density parts is input to the color encoder 4,
The color encoder 4 adds a color to each section and sends the output (e) separately for RGB to the color monitor 5. The color encoder 4, for example, divides the first division into equal density divisions by voltage level.
Add color to the proportions of R100, G1, B1, add color to the proportions of R1, G100, B1 for the second category, and add color to the proportions of R1, G1, B1 for the third category.
After adding colors at the rate of , each output R(e), G(e),
Send B(e) to color monitor 5. Since it is the same as the color encoder processing in the above-mentioned publication,
By adjusting the knobs on the operation panel 14, it is possible to add colors at any desired ratio.

Next, the processing after the switch 8 shown in FIG. 1, that is, the processing performed by the shadow synthesis circuit 9 shown in FIG. 2, will be explained.

In order to make the strength of the analog video signal shown in FIG. 3a close to the real image, the output level adjuster 10 shown in FIG. 2 adjusts the output level to an appropriate level as shown in FIG. 3b. . Here, the level indicated by the black dot is the highest level.

This level-adjusted output level signal is
As shown in the figure, it is supplied to the synchronous separation circuit 11,
In this synchronization separation circuit 11, the timing of the vertical synchronization signal is extracted, and the vertical synchronization signal is supplied to the peak value sampling circuit 12. Since the operation of the synchronization separation circuit 11 is well known, signal waveforms are not shown in FIG. In the peak value sampling circuit 12, as shown in FIG. 3 c-1 and c, the highest output level for one frame of the output of the output level regulator 10 (the level of the black dot in FIG. 3 b) is extracted, After this level is maintained, the polarity is changed to record the maximum output level (-), and the output is output to the output level synthesis circuit 13 at the next stage. As shown in FIG. 3 d-1 and d, the output level synthesis circuit 13 combines the output level for the next frame output from the output level adjuster 10 (see FIG. 3 b) and the peak value sampling circuit 12. By adding the (-) highest output level (see FIG. 3 c) outputted from the output terminal and repeating this process sequentially, a composite output as shown in FIG. 3 d-1 is obtained. As is clear from Figure 3 d-1, at the output level for one synthesized frame,
The highest level is 0V, and the rest are (-) polarity levels.

In the output level synthesis circuit 13, the video signal obtained in this way (signal in FIG. 3 d-1)
is equally divided into the three primary color signals of red, green, and blue to obtain RGB outputs as shown in FIG. 3d. These outputs are sent to a color monitor 5, as shown in FIG. Output signal d from the shadow synthesis circuit 9
Although shown as one line in FIG. 1, it is actually sent out over three signal lines. Furthermore, although the output signal e from the color encoder 4 is shown as one line, it is actually sent out over three signal lines (see FIG. 3e). The RGB output signal d of the shadow composition circuit 9 is input to the color monitor 5 superimposed on the color scheme image e from the color encoder 4, and is displayed on the monitor screen. The composite image displayed on the color monitor 5 is a waveform obtained by superimposing a one-frame image whose highest level is 0V and a DC level color scheme image, as shown in FIG. 3f. Here, for convenience, the case where the color scheme image from the color encoder 4 is entirely red as shown in FIG. 3e will be described as an example. That is,
According to the red image from the color encoder 4, the brightness and darkness of red are displayed on the screen of the color monitor 5 according to the brightness of the shaded image, as shown in FIG. 3f. If the entire screen is green, the composite image shown in FIG. Furthermore, when the color scheme images are combined at arbitrary levels for red, green, and blue, the resulting image is a combination of the respective levels and the output waveform of the shadow synthesis circuit 13.

As described above, the feature of the shadow synthesis method of the present invention is that, as shown in Fig. 3 d-1, by correcting the maximum output level for one frame to 0V,
The brightest part of the shaded image has no change in color before and after composition, and the other parts are displayed darkly with less change in hue.

In the composite image shown in Figure 3 f, there is a change in the green-blue component, but it is at a level that is not displayed even at the highest output level, so it is essentially displayed as a change in only the red component, and the hue change before and after composition. There is no. For example, when the state shown in FIG. 3 b is combined with the image shown in FIG. 3 e without performing the processes shown in FIG. Therefore, even the hue changes significantly, making it unsuitable for purposes of color adjustment.

〔Effect of the invention〕

As explained above, according to the present invention, by correcting the maximum output level for one frame to 0V, the brightest part of the shaded image does not change in color before and after combining with the color encoder output, and the other parts Shadow synthesis is performed to reduce the hue change and display darkly in the area, and the output level of the shaded image is adjusted, so images similar to those of various products can be quickly reproduced on a color monitor. Therefore, it has a great effect when considering color schemes for various designs.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a color adjustment device showing an embodiment of the present invention, Fig. 2 is a detailed block diagram of the shading synthesis circuit in Fig. 1, and Fig. 3 is a signal of each part in Figs. 1 and 2. FIG. 1: Original picture, 2: First television camera,
3: A/D converter, 4: Color encoder,
5: Color monitor, 6: Original image for shadow image, 7: Second
television camera, 8: switching device, 9: shadow synthesis circuit, 10: output level adjuster, 11: synchronization separation circuit, 12: peak value extraction circuit, 13: output level synthesis circuit, 14: operation board.

Claims (1)

[Claims] 1 The image taken by the first television camera,
After classifying the density in stages according to the output level, a color encoder is used for each division to create a colored image in which the three primary colors of red, green, and blue are mixed in an arbitrary ratio, and the first color image is colored. An achromatic shaded image photographed by a television camera or a second television camera provided separately, and the three primary colors of red, green, and blue of the color scheme image are reduced by the difference between the shaded image and the maximum output level for one frame of the shaded image. The color scheme of the image taken by the first television camera can be adjusted to approximate the image of various products by combining the images so as to display them on a color cathode ray tube and adjusting the output level of the shaded image. Color adjustment method.