JPH044475A - Color processing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] Regarding a color tone processing method for obtaining a transparent color tone in image processing, a screen display in which an object appears to be transmitted through a light-transmitting material is created by changing the color tone of the object and the light-transmitting material. The objective is to be able to obtain each independently and synthesize them to obtain the color tone of an object that is easily seen through the object. means for specifying transmittance e; target pixel color generating means for generating the color of the target pixel; transparent pixel color generating means for generating the color of the transparent pixel n; A means for generating a color of the target pixel seen through the transparent pixel n, which generates a color of the target pixel seen through the transparent pixel n by combining the color of the pixel n with the color of the target pixel seen through the transparent pixel n. The structure is such that it can be obtained.

[Industrial application field]

The present invention relates to a color tone processing method for obtaining transparent color tone in image processing.

[Prior Art] ゛As shown in FIG. 5, the conventional color tone processing method inputs data from an input device 1 such as a tablet 1a or a keyboard 1b to a host computer 2, and then inputs data to the arithmetic processing unit of an image control device 3. The image of the desired color tone analyzed in step 4 is displayed on the image display device 5.

In this processing procedure, as shown in FIG. 6, first, the operator inputs data from the tablet 1a, specifies a pixel (reference pixel n) having a color that he wants to get closer to, and then selects the color to be displayed on the host computer 2. The image is transferred to the image control device 3 via. In addition, the reference pixel n and the pixel to be processed (target pixel b
) is input from the keyboard 1b in hexadecimal notation, and is transferred to the image control device 3 via the host computer 2 (
Step 11).

Next, a target pixel is designated from the tablet 1a, and the color of the target pixel is input to the image control device 3 via the host computer 2 (step 12).

For the red (R) value of the three primary colors, find the difference between the input value of the target pixel and the value of the reference pixel n, multiply it by weight e, and add the product to the value of the target pixel, that is, The value of the reference pixel n is approximated by calculating the value of the reference pixel n (step 13).

For the green (G) value of the three primary colors, use equation (1) to find the difference between the input value of the target pixel and the reference pixel n, and multiply the value by the weight e to the value of the target pixel. The addition brings the pixel closer to the reference pixel n (step 14).

For the blue (B) value of the three primary colors, use equation (1) to find the difference between the input value of the target pixel and the reference pixel n, and multiply the value by the weight e to the value of the target pixel. The addition brings the pixel closer to the reference pixel n (step 15).

Value D to be approximated for the three primary colors of the obtained target pixel
(DR, DG, DB) are combined and displayed on the image display device 5 (step 16).

Depending on whether there are no more pixels to be specified and the operator has given an instruction to end the processing, it is determined whether to end or continue the processing (step 17).

If there is no instruction from the operator to end the process, proceed to step 1.
Returning to step 2, the process is repeated from the designation of the target pixel, and if there is an instruction to end the process, the process ends.

This processing procedure is repeated by selecting a reference pixel n and a weight e, and an image is displayed to obtain the color tone for the target pixel.

(Problems to be Solved by the Invention) In the conventional color tone processing method described above, a reference pixel n and a very low weight e are simultaneously selected and applied, and the color tone of the reference pixel n and the target pixel is changed to the color tone of the reference pixel n and the target pixel. In addition to the difference, the color tone of the target pixel n is gradually brought closer to the reference pixel n.

Therefore, in order to obtain a transparent screen display when an object is visible through a light-transmitting material, it is necessary to use a reference pixel n and a weight e to obtain a composite color of the object and the light-transmitting material. It is difficult to select the desired color tone, and furthermore, the color tone depends on both the reference pixel n and the weight e, and can only be approximated little by little, so it takes a lot of time to obtain the desired color tone. .

The present invention has been made in view of the above-mentioned problems, and the technical problem set for the purpose of solving the problem is to create a screen display where an object can be seen through a light-transmitting material. It is an object of the present invention to provide a color tone processing method that enables the color tone of materials to be independently obtained and synthesized to obtain the color tone of an object that can be easily seen through.

[Means to solve the problem]

As a specific means for solving the above-mentioned problems, the present invention provides, in configuring a color tone processing method, a means 21 for specifying a target pixel n, a means 22 for specifying a transparent pixel n, as shown in FIG. , a transmittance e specifying means 23, a target pixel color generating means 24 for generating the color of the target pixel n, and a transmitting pixel n
A transparent pixel color generating means 25 generates a color of the transparent pixel n, and a transparent pixel n generates the color of the target pixel seen through the transparent pixel n by combining the color of the target pixel and the color of the transparent pixel n. It is provided with a color generating means 26 for the target pixel seen through, and obtains a transparent image.

[Effect]

According to the above configuration, as shown in FIG. 2, the present invention specifies the transparent pixel n of the transparent material through which the target pixel can be seen by the transparent pixel n designating means 22, and the transmittance e designating means 23
Specifies the rate at which the transparent pixel n passes through the target pixel (step 31), specifies the target pixel to be processed by the target pixel designation means 21 (step 32), and specifies that the transparent pixel n When a state in which the target pixel is visible through is displayed, the target pixel color generation means 24 generates the color of the target pixel (step 33), and the transparent pixel color generation means 25 generates the color of the transparent pixel n (step 33). 34),
After that, the target pixel color generation means 26 synthesizes the color of the target pixel and the color of the transparent pixel n to generate the color of the target pixel seen through the transparent pixel n, thereby creating a transparent appearance. Obtain an image (step 35).

Then, if processing has not been completed for all target pixels, it repeats from specifying another target pixel, and if processing for all target pixels has been completed, it moves on to the next determination. (step 36).

Next, if processing has not been completed for all transparent pixels n and transmittance e that are subject to processing, repeat from specifying another transparent pixel n and transmittance e, until all transparent pixels n and If the processing of transmittance e has been completed, this processing is ended (step 37).

(Example) Hereinafter, as an example of the present invention, a case will be illustrated and explained in which the color tone of the light-transmitting material side can be obtained by multiplying the transmittance of the transparent pixel by the transmittance.

The configuration is shown in Figure 3. Here, 1 and 2.5 are the same devices as before. Reference numeral 41 denotes an image control device, which inputs the target pixel b, transparent pixel n, and transmittance e from the host computer 2 side via the interface 22, and calculates the color tone of the target pixel seen through the specified transparent pixel n. Calculation is performed by the arithmetic processing unit 43 using the second equation.

When color tone processing is performed using the embodiment configured as described above, the procedure is as shown in FIG. 4.

First, according to instructions from the operator, the image control device 41 transmits the value of the pixel to be transmitted (transparent pixel n) and the value (transmittance e) indicating the ratio of the target pixel to the transparent pixel n.
(Step 51). A target pixel is designated and transferred to the image control device 21 (step 52).

Calculate the second formula for red (R) among the three primary colors,
The red tone DR of the target pixel that can be seen through the magnetically transparent pixel n
is obtained (step 53).

Calculate the second formula for green (G) among the three primary colors,
Line-based color tone DG of the target pixel visible through the transparent pixel n
is obtained (step 54).

Calculate the second formula for blue (B) of the three primary colors,
Blue tone DB of target pixel visible through transparent pixel n
is obtained (step 55).

The obtained color tone D (DR, Da, DB) is synthesized and displayed on the screen by the image display device 5 (step 56).

If there is another target pixel to be specified with the same transparent pixel n and transmittance e, the process returns to step 32, and if there is no other target pixel, the process ends (step 57).

This processing procedure is repeated by selecting several combinations of transparent pixels n and transmittance e until a desired image is obtained.

At this time, as can be seen from the second equation, the variables in the first term on the right side are only the transparent pixel n and the transmittance e, and the color tone of the transparent pixel n is calculated, and the variable in the second term on the right side is only for the target pixel n. and transmittance e only, and the color of the target pixel is found, so select the transparent pixel n and transmittance e independently,
First, by changing only the transparent pixel n to obtain the color tone, then by changing only the transmittance e to obtain the blurred tone, and displaying the desired image, the target pixel when viewing the transparent pixel n through The color tone and degree of change can be easily determined.

In this way, in the embodiment, the transparent pixel n and the transmittance e can be selected and changed independently, and the transparent pixel n
A desired image of the target pixel when viewed through the image can be easily displayed. Therefore, transparent airbrushing can be performed quickly, reducing work time and reducing costs.

〔Effect of the invention 〕

As described above, in the present invention, for a specified transparent pixel n, transmittance e, and target pixel, the color generation means 2 of the target pixel
4 generates the color of the target pixel, and color generation means 2 of the transparent pixel
5 generates the color of the transparent pixel n, and then the color generating means 26 for the target pixel combines the color of the target pixel and the color of the transparent pixel n to generate the color of the target pixel seen through the transparent pixel n. By generating colors and making it possible to obtain a transparent image, in order to obtain a transparent image by airbrush processing, the color tone desired by the target pixel seen through the transparent pixel n can be changed to the target pixel. Since the color of the pixel 1 and the color of the transparent pixel n can be changed one by one, the workability is good, the processing time can be shortened, and as a result, the cost can be reduced.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the principle configuration of the present invention, Fig. 2 is a flowchart showing the processing procedure of the present invention, and Fig. 3 is a diagram showing the principle of the present invention.
Embodiment configuration diagram, FIG. 4 is a flowchart showing the processing procedure of the embodiment, and FIG.
FIG. 6 is a flowchart showing a conventional processing procedure. 21...Target pixel specification means 22...Transmission pixel n specification means 23...Transmittance e specification means 24...Target pixel color generation means 25...Transmission pixel n color generation means 26 ... Color generation means for the target pixel seen through the transparent pixel n, 12

Claims (1)

[Claims] Means (21) for specifying the target pixel b; Means (22) for specifying the transparent pixel n; Means (23) for specifying the transmittance e; Color generation means (24
), and a transparent pixel color generation means (25) that generates the color of the transparent pixel n.
), and a transparent pixel n that combines the color of the target pixel b and the color of the transparent pixel n to generate the color of the target pixel D seen through the transparent pixel n.
A color tone processing method characterized in that the color generation means (26) of the target pixel D seen through the image is provided to obtain a transparent image.