JPH0711825B2 - Image coloring method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] In an image processing system in which an image is captured and displayed on a color display, and different coloring is applied to each closed region of the image displayed on the color display, each closed region of the image is labeled. And the gradation for displaying in the specified color in the look-up table is specified so that each closed region of the image is displayed in the specified color, and then the specified gradation in the look-up table is read out. By writing in each closed area of the image in the internal memory of the control device, the coloring process of the image displayed on the color display can be promptly executed.

[Industrial application field]

The present invention relates to an image processing system that captures an image, displays it on a color display, and performs different coloring for each closed region of the image displayed on the color display, and particularly to speed up the coloring process for each closed region of the image. The present invention relates to an image coloring processing method that can be performed.

In recent years, a computer system and a color display are connected to an image capturing device to capture a rough sketch of an image such as a portrait of an animation, and after this rough sketch is displayed on the color display, the portrait is displayed. Computer systems have come to execute a process of coloring the inside of a closed area showing a face, clothes, etc. in a desired color.

For such coloring processing, a stylus pen or the like is used to specify and input a desired color for each closed region of the image displayed in the color display, and a binary image (contour If the pixel indicating "1" is "1", the pixels indicating the other areas are "0"). For each closed area of the binary image of the memory that stores the gradation that indicates the brightness level for each of the three primary colors of the color display. It is necessary, however, that the processing from the color designation input to the storage of the gradations of the three primary colors in the memory must be fast.

[Conventional technology]

FIG. 5 is a block diagram showing an example of a conventional image processing system, FIG. 6 is a flow chart for explaining the operation of FIG. 5, and FIG. 7 is a view for explaining the operation of FIG.

The host computer 1 first executes the input processing shown in FIG. 6 in response to a command from the operator which is input via the control device 2. That is, the control device 2 is instructed to operate the photographing device 6 to photograph the rough sketch 7 of the animation, for example.

The image capturing device 6 scans, for example, this sketch, detects a line indicating the outline of the image, and sends this detection data to the control device 2. The control device 2 performs a binarization process on the detected data as shown in FIG. That is, the pixel of the line showing the contour is "0"
Pixels indicating the other areas are set to "1", stored in the internal memory 12 of the control device 2 as a binary image, and then the binary image read from the internal memory 12 is sent to the color display 3 for color display. After being stored in the display memory 13 of No. 3, it is displayed on the display screen 8 of the color display 3 as shown in the image 9 of FIG.

There are two closed areas of this image 9 as shown by, for example, and by moving the stylus pen 4 on the scanning board 5, the cursor 10 on the display screen 8 is moved to display the desired color on the color sample 11. After the stylus pen 4 has been positioned, the desired color is designated, then the cursor 10 is moved to the inside of the area of the image 9, and the stylus pen 4 is pressed again to instruct the filling. The controller 2 receives an instruction from the host computer 1 that receives the instruction.
Performs the filling process shown in FIG. That is, the inside of the area is filled with the specified color.

Since the color display 3 normally expresses each of the three primary colors of red, blue and green with 8 bits, various colors can be expressed with 256 gradations for each pixel. Then, although it has a display memory 13 for storing pixels for one display screen in order to display an image, it does not have a function of performing a process of filling an area of the image with a designated color.

Therefore, the control device 2 performs the filling process in the internal memory 12 and sends the result of the process, that is, the gradation data of the three primary colors to the color display 3 and the color display 3
By rewriting the gradation data of the three primary colors of each pixel corresponding to the area of the image 9 stored in the display memory 13, the area of the image 9 displayed on the display screen 8 is colored.

After coloring the area of the image 9 in this manner, the cursor 10 is positioned and designated at the display position of the desired color of the color sample 11 in the same manner as described above, and then the area of the image 9 is displayed. The area can be colored by moving the cursor 10 and instructing the filling.

When the filling of all the areas to be colored is completed by repeating such operations, the internal memory 12 of the control device 2 is
An image filled with each color desired by the operator is stored in.

[Problems to be solved by the invention]

As described above, the display screen 8 of the color display 3 is conventionally used.
When coloring inside each closed area of the image displayed above,
The area of the image designated by the internal memory 12 of the control device 2 is filled with the designated color, transferred to the color display 3, and the display memory 13 of the color display is displayed.
By rewriting the gradation data of No. 3, the image displayed on the display screen 8 is colored, so that it is necessary to transfer the gradation data between the control device 2 and the color display 3.
It takes time to display the closed area of the image filled with the specified color.

Images such as animations have multiple closed areas, and the number of images is large, so it takes a lot of time if the displayed colors are not suitable and you try again, and it is practical to use an image processing system. There is a problem that it disappears.

[Means for solving problems]

 FIG. 1 is a block diagram of the principle of the present invention.

FIG. 1 shows a host computer 1 of FIG. 5 provided with a labeling instruction means 15, a look-up table operation instruction means 16 and a density conversion instruction means 17, and the host computer 1 performs the binarization processing shown in FIG. After labeling instruction means
Based on the instruction of 15, the control device 2 is controlled so that all the closed regions of the image are classified and recognized, and different density values are given to the respective closed regions to indicate that the closed regions are different, and the control is performed. It is stored in the internal memory 12 of the device 2.

That is, for example, it is recognized that the image 9 shown in FIG. 7 is divided into each area, and the density value of the area and the area density value are set to different values.

This labeling is used in the field of particle analysis, and is a known technique described on page 75 of an introduction to computer image processing (publisher, Soken Shuppan Co., Ltd., published on March 10, 1985, first edition). .

Next, the host computer 1 instructs the control device 2 to transfer the labeled image data from the internal memory 12 to the display memory 13 of the color display 3 to store the image data therein, and to instruct the look-up table operation instructing means 16. Based on FIG. 5, the color display 3 is controlled via the control device 2 by the color sample instructed by the operator using the stylus pen 4 and the scanning board 5 as in FIG. 5, and the look-up table 14 provided in the color display 3 is set. The density value of each pixel read out from the display memory 13 by operation, that is, each gradation of the three primary colors of each pixel in the same region has the same value, but this same gradation is represented by the designated color. By designating respective gradations of the three primary colors so that they can be displayed and referring to the specified gradations, each closed region of the image 9 on the display screen 8 is colored and displayed.

Since the look-up table 14 can change the luminance levels of the three primary colors of red, blue, and green of each pixel read from the display memory 13 for each gradation from 0 gradation to 255 gradation, A specified closed area of the image 9 displayed on the screen 8, for example, the color of the area can be displayed in the specified color.

By using the lookup table 14 in this way, the image in the internal memory 12 of the control device 2 is filled with the designated color,
Since the process of transferring to the display memory 13 of the color display 3 is unnecessary, the display screen 8 of the color display 3
The color in the designated area of the image 9 above is instantly displayed in the designated color.

In this way, after displaying the color of all the areas with the designated color, the host computer 1 controls the control device 2 based on the instruction of the density conversion instructing means 17 according to the instruction of the operator, and the color display is displayed. The brightness levels designated by the look-up table operation instructing means 16 of the look-up table 14 of No. 3, that is, the gradations for each color of red, blue, and green are read, and the image 9 in the internal memory 12 of the control device 2 is closed. The gradation of the three primary colors of each pixel in each area is rewritten.

[Action]

With the above configuration, the labeling instruction means 15
Indicates the closed area of the image 9 and the look-up table operation instructing means 16 fills the closed area of the image 9 divided by the labeling instructing means 15 with the color desired by the operator.
Is displayed instantly, and the density conversion instructing means 17 records the gradations of the three primary colors of the image 9 for which the painting processing has been completed in the internal memory 12 of the control device 2, so that the coloring processing time of the image 9 can be shortened.

〔Example〕

FIG. 2 is a block diagram of a circuit showing an embodiment of the present invention.
FIG. 3 is a flow chart for explaining the operation of FIG.

As in FIG. 5, the host computer 1 instructs the control device 2 as an input process shown in FIG. 3 by the operator's instruction input through the control device 2 to operate the image capturing device 6 to capture the sketch 7. The image capturing device 6 scans this sketch, detects a line indicating the outline of the image, and sends it to the control device 2.

The control device 2 performs the binarization process shown in FIG. 3 on this line. That is, the pixels of the outline line are set to “0”, and the pixels of the other areas are set to “1”, and the internal memory 12 of the control device 2 is set.
Stored as a binary image in.

The host computer 1, which receives the notification that the storage of the image is completed from the control device 2, performs the labeling process as shown in FIG. That is, based on the instruction of the labeling instruction program 18, the control device 2 is controlled so that all the closed regions of the image are recognized in a divided manner, and different density values are given to the respective closed regions in order to show that each closed region is different. Is stored in the internal memory 12 of the control device 2. That is, for example, it is recognized that the image 9 shown in FIG. 7 is divided into each area, and the density value of the area and the area density value are set to different values.

Next, the host computer 1 instructs the control device 2 to transfer the image data, which has been labeled and stored in the internal memory 12, to the display memory 13 of the color display 3 to be stored therein, and the lookup shown in FIG. As the table operation processing, based on the instruction of the look-up table operation instruction program 19, the color display 3 is passed through the control device 2.
And the look-up table 14 of the color display 3 is operated to obtain the same density value of each pixel read from the display memory 13, that is, each gradation of the three primary colors of each pixel is the same in the same area. Although it is a value, by designating each gradation of the three primary colors so that the same gradation can be displayed in the specified color and referring to the specified gradation, the display screen 8
Each closed region of the image 9 is colored and displayed.

FIG. 4 is a diagram for explaining the operation of the lookup table.

Lookup table 21 is red, lookup table 22
Is blue and the look-up table 23 changes the brightness level of green respectively, the look-up table 21 displays the brightness level of red of each pixel read from the display memory 13,
For example, the gradation can be changed from 0 gradation to 255 gradation for each gradation.

Similarly, the look-up table 22 changes the brightness level of blue from 0 to 255, and the look-up table 23 changes the brightness level of green from 0 to 255 for each gradation.

Each pixel in the closed region of the image 9 stored in the display memory 13 is set to a certain density value by the labeling process as described above. Assuming that this density value is the brightest, the gradations of the three primary colors are 255 gradations. Therefore, the area of the image 9 displayed on the display screen 8 is displayed in the brightest white.

When the operator designates the color of the color sample 11 with the stylus pen 4, if this color is red, the look-up table 21 has 255 gradations for each pixel read from the area of the image 9 of the display memory 13. The red brightness level is specified, and the look-up tables 22 and 23 specify the blue and green brightness levels of the respective pixels read from the area of the image 9 with 0 gradation.

Therefore, the color of the designated area of the image 9 displayed on the display screen 8 can be displayed in the designated red color. If the specified color is an intermediate color of strong red, the lookup table 21 has 255 gradations and the lookup table 22
Is 50 gradations, and the look-up table 23 is 20 gradations, for example.
The gradation specifies the brightness level of each color.

When the look-up tables 21 to 23 are used in this manner, the process of filling the image in the internal memory 12 of the control device 2 with the designated color and transferring the image to the display memory 13 of the color display 3 becomes unnecessary. The color in the designated area of the image 9 on the display screen 8 of No. 3 is instantly displayed in the designated color.

In this way, after displaying the color of all the areas with the designated color, the host computer 1 executes the density conversion processing shown in FIG. The control device 2 is controlled to read out the brightness levels designated by the look-up table operation instruction program 19 of the look-up tables 21 to 23 of the color display 3, that is, the gradations for each color of red, blue and green. The gradations of the three primary colors of each pixel in each area of the image 9 in the internal memory 12 of the control device 2 are rewritten.

〔The invention's effect〕

As described above, according to the present invention, in the image processing system, when coloring each closed region of the image displayed on the color display, there is no need for a waiting time from when the color is designated until the color of the displayed image is changed. The processing speed can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a block diagram of a circuit showing an embodiment of the present invention, FIG. 3 is a flow chart for explaining the operation of FIG. 2, and FIG. 4 is a look-up table. FIG. 5 is a block diagram showing an example of a conventional image processing system, FIG. 6 is a flow chart explaining the operation of FIG. 5, and FIG. 7 is a diagram explaining the operation of FIG. is there. In the figure, 1 is a host computer, 2 is a control device, 3 is a color display, 4 is a stylus pen, 5 is a scanning plate, 6 is a photographing device, 7 is a sketch, 8 is a display screen, 9 is an image, 10 is a cursor, 11 is a color sample, 12 is an internal memory, 13 is a display memory, 14,21,22,23 are lookup tables, 15 is a labeling instruction means, 16 is a lookup table operation instruction means, 17 is a density conversion instruction means, Reference numeral 18 is a labeling instruction program, 19 is a lookup table operation instruction program, and 20 is a density conversion instruction program.

Claims (1)

[Claims] Claim: What is claimed is: 1. An imaging device (6) for taking an image, and a color for displaying the image and referring to a look-up table (14) containing a color display designated for each closed region of the image. After controlling the display (3) and the photographing device (6) to store the photographed image in the internal memory (12), the image is sent to the color display (3) and the color display (3 ) Control the look-up table (14) to display the color display (3).
An image processing system comprising: a control device (2) for displaying an image photographed by the photographing device (6); and a host computer (1) for instructing the control device (2) to operate. A labeling instructing means (15) that divides the closed region of the image stored in the internal memory (12) of the control device (2) and gives a different density value to each closed region, and the labeling instructing means ( Gradation corresponding to the designated color of the look-up table (14) that indicates the luminance level of each of the three primary colors for each pixel by gradation in order to display the closed area divided by 15) in the designated color. And a gray level designated by the look-up table operation instructing means (16) from the look-up table (14) and an internal memory (12) of the control device (2). ) Designation A density conversion instructing means (17) for instructing to write in each closed area is provided, and each of the images captured by the imaging device (6) and stored in the internal memory (12) of the control device (2). In order to divide the closed region and display it in a color designated for each division, after the gradation of the look-up table (14) is designated and displayed on the color display (3), the look-up table is displayed. (14)
The image coloring processing method, wherein the designated gradation is read out and the read gradation is written for each closed region of the corresponding image in the internal memory (12) of the control device (2).