Image processing apparatus and image processing method as well as computer program
First Claim
1. An image processing apparatus, comprising:
- a correction parameter calculation section for calculating, as a correction parameter for component pixels of a processing image, a saturation reduction rate corresponding to each of the pixels; and
a correction processing section for applying the saturation reduction rate to execute a pixel value correction process including a saturation reduction process of the component pixels of the processing image;
said correction processing section including a pixel saturation reduction processing section for executing the saturation reduction process for each of the pixels based on the saturation reduction rate calculated by said correction parameter calculation section, and a pixel saturation correction processing section for correcting the saturation of any saturation reduction pixel whose saturation has been reduced by said pixel saturation reduction processing section so that the difference of the saturation of the saturation reduction pixel and the saturation of a surrounding reference pixel is reduced.
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Abstract
An image processing apparatus and an image processing method are disclosed by which an image correction process for a false color such as a purple fringe can be executed efficiently while excessive reduction of the saturation is prevented to produce image data of a high quality. A saturation reduction rate corresponding to each pixel is calculated, and saturation reduction of the pixel is executed based on the saturation reduction rate. Then, saturation correction is executed so that the difference between the hue of the pixel whose saturation has been reduced and a surrounding reference pixel may be reduced. Further, a surrounding pixel to be referred to in the saturation correction process is selected along a scanning line.
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Citations
17 Claims
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1. An image processing apparatus, comprising:
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a correction parameter calculation section for calculating, as a correction parameter for component pixels of a processing image, a saturation reduction rate corresponding to each of the pixels; and
a correction processing section for applying the saturation reduction rate to execute a pixel value correction process including a saturation reduction process of the component pixels of the processing image;
said correction processing section including a pixel saturation reduction processing section for executing the saturation reduction process for each of the pixels based on the saturation reduction rate calculated by said correction parameter calculation section, and a pixel saturation correction processing section for correcting the saturation of any saturation reduction pixel whose saturation has been reduced by said pixel saturation reduction processing section so that the difference of the saturation of the saturation reduction pixel and the saturation of a surrounding reference pixel is reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An image processing method, comprising the steps of:
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calculating, as a correction parameter for component pixels of a processing image, a saturation reduction rate corresponding to each of the pixels; and
applying the saturation reduction rate to execute a pixel value correction process including a saturation reduction process of the component pixels of the processing image;
the correction processing step including steps of executing the saturation reduction process for each of the pixels based on the saturation reduction rate calculated by the correction parameter calculation step, and correcting the saturation of any saturation reduction pixel whose saturation has been reduced by the pixel saturation reduction processing step so that the difference of the saturation of the saturation reduction pixel and the saturation of a surrounding reference pixel is reduced. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer program for causing image processing to be executed on a computer, comprising the steps of:
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calculating, as a correction parameter for component pixels of a processing image, a saturation reduction rate corresponding to each of the pixels; and
applying the saturation reduction rate to execute a pixel value correction process including a saturation reduction process of the component pixels of the processing image;
the correction processing step including steps of executing the saturation reduction process for each of the pixels based on the saturation reduction rate calculated by the correction parameter calculation step, and correcting the saturation of any saturation reduction pixel whose saturation has been reduced by the pixel saturation reduction processing step so that the difference of the saturation of the saturation reduction pixel and the saturation of a surrounding reference pixel.
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Specification