JPS63316888A - Processing system for coloring image - 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] In an image processing system that captures an image and displays it on a color display, and colors each closed region of the image displayed on the color display differently, each closed region of the image is colored differently by labeling. By dividing the image and specifying the gradation for displaying in the specified color in the lookup table, each closed area of the image is displayed in the specified color, and then the specified gradation in the lookup table is read out. By writing into each closed area of the image in the internal memory of the control device, coloring the image displayed on the color display allows the process to be executed quickly.

[Industrial application field]

The present invention relates to an image processing system that photographs an image, displays it on a color display, and applies different colors to each closed area of the image displayed on the color display. In particular, the coloring of each closed area of the image requires processing. Image coloring, which can be performed at high speed, is related to a processing method.

In recent years, a computer system has been connected to a color display and a photographing device that captures an image, and a sketch that depicts the outline of an image, such as an animation portrait, is photographed, and after this sketch is displayed on a color display, the portrait is displayed. Nowadays, computer systems are used to perform coloring in order to express the inside of a closed region showing a person's face, clothes, etc. in a desired color.

This kind of coloring process uses a stylus pen etc.
Specify and input the desired color for each closed area of the image displayed on the color display to create a binary image showing the outline of a portrait, etc. (If the pixel representing the outline is "1", the pixels representing other areas are It is necessary to store the gradation that indicates the brightness level of each of the three primary colors of the color display for each closed area of the binary image in the memory that stores ``0''), but from this color specification input, the gradation of the three primary colors is stored in the memory. The processing until it is stored needs to be fast.

[Conventional technology]

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

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

For example, the photographing device 6 scans this sketch, detects lines indicating the outline of the image, and sends this detected data to the control device 2. The control device 2 performs a binarization process on this detected data as shown in FIG. In other words, the pixels of the line indicating the outline are “θ
'', pixels indicating other areas are set as 1'', and are stored as a binary image in the internal memory 12 of the control device 2, and then
The binary image read from the internal memory 12 is sent to the color display 3, and after being stored in the display memory 13 of the color display 3, it is displayed on the display screen 8 of the color display 3 as shown in image 9 in FIG. Display.

There are two closed areas in this image 9, as shown by ■ and ■, for example, and by moving the stylus pen 4 on the scanning plate 5,
Move the cursor 10 on the display screen 8, position it at the display position of the desired color on the color sample 11, press the stylus pen 4 to specify the desired color, and then move the cursor 10, for example, to the area of the image 9. When the host computer 1 receives this instruction, the control device 2
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, each pixel can express various colors with 256 gradations. Although it has a display memory 13 that stores pixels for one display screen to display images,
It does not have a function to fill the image area with a specified color.

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

After coloring the area ■ of image 9 in this way, next, in the same manner as described above, position the cursor 10 at the display position of the desired color on the color sample 11, and then specify the display position of the desired color.
By moving the cursor 10 within the area and instructing it to be filled, the area can be colored.

By repeating such operations, when all areas to be colored are completed, the internal memory 1 of the control device W2 is filled in.
2 stores an image filled in with colors desired by the operator.

[Problem that the invention seeks to solve]

As mentioned above, conventionally, the display screen 8 of the color display 3
When coloring within each closed region of the image displayed above,
Performing a process of filling the designated image area with a designated color in the internal memory 12 of the control device 2, transmitting it to the color display 3, and rewriting the gradation data in the display memory 13 of the color display. In order to color the image displayed on the display screen 8, it is necessary to transfer gradation data between the control device 2 and the color display 3, and until the closed area of the image filled with the specified color is displayed. It takes time.

Images such as animations have multiple closed areas and a large number of images, so if the displayed color is inappropriate and you have to redo it, it will take a lot of time and it is difficult to use an image processing system. The problem is that it is no longer practical.

[Means for solving problems]

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

FIG. 1 shows the host computer l shown in FIG. 5 provided with labeling instruction means 15, lookup table operation instruction means 16, and density conversion instruction means 17, and the host computer 1 performs the binarization process shown in FIG. After that, based on the instructions from the labeling instruction means 15, the control device 2 is controlled to separate and recognize all the closed regions of the image, and to indicate that each closed region is different, a different density is assigned to each closed region. A value is given and 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 regions (2) and (2), and the density value of the region (2) and the density value of the region (2) 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 Introduction to Computer Image Processing (published by Souken Publishing Co., Ltd., first edition published on March 10, 1985). .

Next, the host computer 1 instructs the control device 2 to transfer the labeled image data from the internal memory 12 to the front thread memory 13 of the color display 3 and store it in the color indicated by the lookup teletor. Control the color display 3 via the control device 2 according to the sample,
By operating the look-up table 14 included in the color display 3, the density value of each pixel is read out from the display memory 13, that is, each gradation of the three primary colors of each pixel has the same value within the same area. However, in order to display the same gradation in the specified color, each closed area of the image 9 on the display screen 8 is colored by specifying each gradation of the three primary colors and referring to the specified gradation. Display.

The lookup table 14 can vary the volatility level of the three primary colors red, blue, and green of each pixel read from the display memory 13 for each gradation, for example from O gradation to 255 gradation. It is possible to display the color of a specified closed area of the image 9 displayed on the display screen 8, for example, the area ■, in a specified color.

When the look-up table 14 is used in this way, it is not necessary to fill the image in the internal memory 12 of the control device 2 with a specified color and transfer it to the display memory 13 of the color display 3. The color within the designated area of the image 9 on the display screen 8 is instantly displayed in the designated color.

After displaying all the areas in the specified color in this way, the host computer 1, in response to an operator's instruction, controls the control device 2 based on an instruction from the density conversion instructing means 17.
to exude the luminance level specified by the look amplifier table operation instruction means 16 of the look-up table 14 of the color display 3, that is, the gradation of each color of red, blue, and green, and Image 9 in memory 12
The gradations of the three primary colors of each pixel for each closed region are rewritten.

[Operation] By configuring as described above, the labeling instruction means 1
5 divides the closed areas of the image 9, and the lookup table operation instruction means 16 instantaneously displays the image 9 filled with a color desired by the operator for each closed area of the image 9 divided by the labeling instruction means 15, and adjusts the density. The conversion instruction means 17 converts the gradations of the three primary colors of the image 9 for which the filling process has been completed to the control device 2.
Since the image 9 is recorded in the internal memory 12, the coloring of the image 9 can shorten the processing time.

〔Example〕

FIG. 2 is a block diagram of a circuit showing an embodiment of the present invention.
FIG. 3 is a flowchart illustrating the operation of FIG. 2.

Similar to FIG. 5, the host computer 1 instructs the control device 2 to operate the photographing device 6 to photograph the sketch 7 as shown in FIG. The photographing device 6 scans this sketch to detect lines indicating the outline of the image and sends them 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 line indicating the outline are set to "0" and the pixels indicating other areas are set to "l". The image is stored in the internal memory 12 as a binary image.

The host computer 1, which has received the notification from the control device 2 that the storage of the image has been completed, performs the labeling process as shown in FIG. All of the closed regions are divided and recognized, and in order to indicate that each closed region is different, a different density value is given to each closed region, and the density value is stored in the internal memory 12 of the control device 2. That is, for example, recognizing that the image 9 shown in FIG. 7 is divided into areas ■ and ■,
The density value of area ■ and the density value of area ■ are set to different values.

Next, the host computer 1 instructs the control device 2 to transfer the image data that has been labeled and stored in the internal memory 12 to the display memory 13 of the color display 3 and store it therein, and performs a lookup as shown in FIG. As table operation processing, the color display 3 is controlled via the control device 2 based on instructions from the lookup table operation instruction program 19, and the lookup table 14 included in the color display 3 is operated to display the memo IJ1.
The density value of each pixel read from 3. In other words, each gradation of the three primary colors of each pixel has the same value within the same area, but each gradation of the three primary colors is By specifying the tone and referring to this specified tone,
Each closed area of the image 9 on the display screen 8 is colored and displayed.

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

Assuming that the lookup table 21 changes the brightness level of red, the lookup table 22 changes the brightness level of blue, and the lookup table 23 changes the brightness level of green, lookup table 2
1 varies the brightness level of red of each pixel read from the display memory 13 for each gradation, for example from O gradation to 255 gradation.

Similarly, the lookup table 22 sets the blue brightness level to O.
From the gradation to the 255th gradation, the look-up table 23 varies the green luminance level from 0 to the 255th gradation for each gradation.

Each pixel of the closed area (3) of the image 9 stored in the display memory 13 has been set to the density value as described above by the labeling process. Assuming that this density value is the brightest, there are 255 gradations for each of the three primary colors. Therefore,
Area (3) of the image 9 displayed on the display screen 8 will be displayed in the brightest white.

When the operator specifies the color of the color sample 11 with the stylus pen 4, assuming that this color is red, the look-up table 21 specifies each pixel read from the area ■ of the image 9 in the display memory 13 at 255 gradations. Specify the red brightness level of
Lookup tables 22 and 23 specify the blue and green brightness levels of each pixel read out from area 2 of image 9 at O gradation, respectively.

Therefore, the color of the designated area (3) of the image 9 displayed on the display screen 8 can be displayed in the designated red color. If the specified color is a strong neutral color of red, the lookup table 21 has 255 gradations, the lookup table 22 has, for example, 50 gradations, and the lookup table 23 has, for example, 20 gradations, and the brightness of each color. Specify the level.

When the lookup tables 21 to 23 are used in this way, it becomes unnecessary to fill the image in the internal memory 12 of the control device 2 with a specified color and transfer it to the display memory 13 of the color display 3. 3
The color within the designated area of the image 9 on the display screen 8 is instantly displayed in the designated color.

After displaying all the areas in the specified color in this way, the host computer 1 performs the density conversion process shown in FIG. Controlling the control device 2,
Color display 3 lookup table 21-2
The brightness level specified by the lookup table operation instruction program 19 of No. 3, that is, the gradation of each color of red, blue, and green, is read out, and the image 9 of the internal memory 12 of the control device 2 is read out.
The gradations of the three primary colors of each pixel in each region are rewritten.

〔Effect of the invention〕

As explained above, the present invention eliminates the need for waiting time from specifying a color until the color of the displayed image is replaced when coloring each closed area of an image displayed on a color display in an image processing system. , processing speed can be improved.

[Brief explanation of the drawing]

FIG. 1 is a principle block diagram of the present invention, FIG. 2 is a block diagram of a circuit showing an embodiment of the present invention, FIG. 3 is a flowchart explaining the operation of FIG. 2, and FIG.
5 is a block diagram showing an example of a conventional image processing system. FIG. 6 is a flowchart explaining the operation of FIG. 5.
The figure is a diagram explaining the operation of FIG. 5. In the figure, 1 is a host computer, 2 is a control device, 7 is a sketch,
8 is the display screen, 9 is the image,
10 is the cursor, 11 is the color sample, 1
2 is internal memory, 13 is display memory, 14.21.22.23 is lookup table, 15
16 is a labeling instruction means, 16 is a lookup table operation instruction means, 17 is a concentration conversion instruction means, 18 is a labeling instruction program, 19 is a lookup table operation instruction program, 20
is a concentration conversion instruction program. Votes 1 Tsutsukuri 5 Tsutsuki 6 Insects 7 Insans

Claims (1)

[Claims] Execution is performed by referring to a photographing device (6) that photographs an image, and a look-up table (14) that displays the image and includes color display specified for each closed area of the image. After storing an image taken by controlling the color display (3) and the photographing device (6) in the internal memory (12), transmitting this image to the color display (3),
Lookup table (
14) to cause the color display (3) to display an image taken by the photographing device (6); and a host computer to instruct the control device (2) to operate. In an image processing system comprising (1), the control device (2) divides closed regions of the image stored in the internal memory (12), and instructs to assign different density values to each closed region. A labeling instruction means (15) and a look that instructs the luminance level of each of the three primary colors for each pixel in gradations in order to display the closed regions divided by the labeling instruction means (15) in respective specified colors. a lookup table operation instruction means (16) for specifying a gradation corresponding to a specified color in the lookup table (14); and a gradation specified by the lookup table operation instruction means (16), ) to write into specified closed areas of the internal memory (12) of the readout control device (2).
In order to classify each closed region of the image taken by the photographing device (6) and stored in the internal memory (12) of the control device (2), and display it in a specified color for each division, After specifying the gradation of the lookup table (14) and displaying it on the color display (3), the lookup table (14) is displayed on the color display (3).
14) An image coloring process characterized by reading the specified gradation and writing the read gradation for each closed area of the corresponding image in the internal memory (12) of the control device (2). method.