JP2007220056A - Image processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of a requirement of enormous labor in production of illustration and the like based on line drawing, which requires high precision in discriminative painting work. <P>SOLUTION: Simple discriminative painting not requiring precision is carried out by a producer of the illustration and the like, and detailed discriminative painting requiring precision is carried out by this invention. In this way, labor required for manual discriminative painting can be reduced greatly. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

Detailed Description of the Invention

The present invention relates to a method and apparatus for separately painting an illustration or the like based on a line drawing.

In recent years, computers are often used for producing illustrations and the like. When performing painting separately in the production of illustrations, etc., there are conventional functions that can also be used for painting, such as brushes, painting, and passes. Brush is a function that allows you to paint pixels as if painting with a paintbrush. Filling is a function that fills the pixels included in the region with pixels of the same color adjacent to the designated pixel or a pixel close to it as the target region. A path is a function that surrounds an area using a Bezier curve or a spline curve and fills pixels included in the area.

In the conventional fill function, a threshold is used as a method of separately painting the intermediate color, or a method of simply expanding one pixel for the extracted region, so that an undetermined region to be separated remains, which is manually performed. It was necessary to paint the details that required accuracy. The task is to reduce the labor involved in this manual work.

In order to solve the above-described problem, the image processing apparatus according to claim 1 is the smallest unit having a value for a digital image when a digital image to be separately painted is produced in production of an illustration or the like based on a line drawing. And the set of pixels as a region, the region to be painted from now on as an undetermined region, and a region that has already been painted and should be identified and not mixed and integrated even if adjacent A region power, a number for identifying the determined region power is a power number, a region obtained by dividing the pixel by light and shade is a light and dark region, and the lightest and lightest region of the light and dark region is a target region, The pixel included in the undefined region adjacent to at least one of the defined region forces and included in the target area A region enlarging means for storing the power number from one of the determined region powers adjacent to the pixel for inclusion in the determined region power; and An undetermined region exclusion unit that repeats until the storing operation is not performed, and a unit that repeats the previous undetermined region exclusion unit while expanding the target area.

According to a second aspect of the present invention, there is provided the image processing device according to the first aspect, in which, when the digital image has a layer, the pixel is divided into any one of the determined area force or the undefined area, Means for obtaining the value of the pixel from each of the different layers when determining whether or not it is included in the target area;

An image processing apparatus according to a third aspect comprises means according to any one of the first and second aspects, wherein the darkest shaded area of the shaded areas is the target area.

According to the present invention, since the painting intended by the creator of the illustrations can be performed with high accuracy based on the simple painting shown by the creator of the illustrations, the time required for manual work And labor can be greatly reduced. Since the painting of details requiring high accuracy is performed with high accuracy, the practicality is extremely large.

Since the present invention is used for producing illustrations and the like, it is best to implement it as a function of image processing software.

Hereinafter, an embodiment of the present invention will be described in detail.

FIG. 1 is a flow diagram of one embodiment of the present invention. In one embodiment of the present invention, the pixel color is expressed by RGB of red, green, and blue, each of which is 8-bit quantized and has 256 gradation levels from 0 to 255.

In order to make a region that has already been painted as a definite region and a region that should be painted out as an undetermined region, in one embodiment of the present invention, determination is made based on pixel saturation, and the threshold value is other than 0 and 0 And When the saturation threshold value is other than 0 and 0, if R, G, and B are the same for RGB, the saturation is 0, so that it is an undefined region, and any of R, G, and B is selected. If they are not equal, the saturation is not 0, so that it can be determined as a definite region.

Next, according to an embodiment of the present invention, whether or not a pixel determined to be an undetermined region is included in the target area is determined by the luminance of the pixel, the threshold value is set to 8, and the lightest shaded area is set to 248 to 248. 255. When the luminance threshold value is 8, since R, G, and B of the undetermined region are equal for the color component RGB, if the R of the undetermined region is in the range of 248 to 255, it is included in the target area. Can be determined.

Next, it is determined whether or not the pixels included in the target area are adjacent to at least one of the fixed regions, and in one embodiment of the present invention, whether the upper, lower, left, and right four pixels are the determined regions is determined by the determination based on the saturation. To do. If at least one of the upper, lower, left, and right pixels has a definite region, it can be determined that it is adjacent to the definite region.

If all these three conditions are satisfied, it can be included in the definite region. In one embodiment of the present invention, this determination is performed for all pixels, and the power number of the determined area that is first found among the four pixels in the upper, lower, left, and right directions is stored in the pixel for inclusion in the determined area. In order to make this determination for all the pixels at the same time, the buffering is performed and committed every time. The operations up to here are repeated until there is no determination that any pixel is included in the determined region.

Next, the target area is expanded. If the luminance range is expanded by 8 according to the threshold value and R of the undetermined region is in the range of 240 to 255, it is determined that the region is included in the target area, and the same operation is performed. In the case of 255, the process is repeated until the determination that the pixel is included in the definite region does not occur.

FIG. 2 is a diagram showing image changes in one embodiment of the present invention. As described above, according to the present invention, it is possible to paint all of the undetermined areas with high accuracy according to the line drawing intended by the creator such as an illustration, and the effect is great.

In the present invention, the color component can be other than RGB, the quantization can be other than 8 bits, and the determination of the definite region and the undetermined region can be made using non-saturation. It is also possible to set the threshold value for determining the definite region and the undetermined region to other than 0, and it is also possible to use non-luminance for determining whether the region is included in the target area. It is also possible to set the threshold value of the target area to other than 8. The thinnest shaded area can be other than 248-255. All these applications are within the scope of the present invention.

This is effective for painting illustrations based on line drawings and animations based on line drawings.

The flowchart of one Example of this invention. The figure which shows the change of the image in one Example of this invention.

Explanation of symbols

Claims (3)

The smallest unit having a value for a digital image is a pixel, the set of pixels is an area, the area to be painted from now on is an undetermined area, and already painted and should be identified and adjacent to each other. The region that is not mixed and integrated is a definite region force, a number for identifying the definite region force is a force number, a region obtained by dividing the pixel by light and shade is a light and dark region, and light and dark of the light and dark region And the pixel included in the undetermined region adjacent to at least one of the determined region forces and the pixel included in the target region is defined as the determined region force. Area expansion means for storing the power number from one of the determined area powers adjacent to the pixel for inclusion And an undetermined region exclusion unit that repeats the region expansion unit until the operation for storing the power number is not performed, and a unit that repeats the previous undetermined region exclusion unit while expanding the target area. Processing equipment. The determination according to claim 1, wherein when the digital image has a layer, the determination of dividing the pixel into any of the determined area power or the undefined area and determining whether the pixel is included in the target area. An image processing apparatus comprising means for acquiring the value of the pixel from each of the different layers. The image processing apparatus according to claim 1, further comprising means for setting the darkest shaded area among the shaded areas as the target area.

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