NOISE REDUCTION APPARATUS, NOISE REDUCTION METHOD, AND PROGRAM
First Claim
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1. A noise reduction method, comprising:
- for each of multi-layer regions each containing a pixel of interest and having a successively reducing area, calculating a pixel statistic value of pixels in that region;
for each of successive layers, correcting the pixel statistic value for a region at a current layer using a corrected pixel statistic value for a region at a preceding layer having a greater area than that of the region at the current layer; and
correcting said pixel of interest using a corrected pixel statistic value for a region with a smallest area.
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Abstract
The present invention is directed to a noise reduction method, comprising: for each of multi-layer regions each containing a pixel of interest and having a successively reducing area, calculating a pixel statistic value of pixels in that region; for each of successive layers, correcting the pixel statistic value for a region at a current layer using a corrected pixel statistic value for a region at a preceding layer having a greater area than that of the region at the current layer; and correcting the pixel of interest using a corrected pixel statistic value for a region with a smallest area.
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Citations
21 Claims
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1. A noise reduction method, comprising:
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for each of multi-layer regions each containing a pixel of interest and having a successively reducing area, calculating a pixel statistic value of pixels in that region; for each of successive layers, correcting the pixel statistic value for a region at a current layer using a corrected pixel statistic value for a region at a preceding layer having a greater area than that of the region at the current layer; and correcting said pixel of interest using a corrected pixel statistic value for a region with a smallest area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A noise reduction apparatus, comprising:
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pixel statistic value calculating unit configured to, for each of multi-layer regions each containing a pixel of interest and having a successively reducing area, calculate a pixel statistic value of pixels in that region; correcting unit configured to, for each of successive layers, correct the pixel statistic value for a region at a current layer using a corrected pixel statistic value for a region at a preceding layer having a greater area than that of the region at the current layer, and correcting said pixel of interest using a corrected pixel statistic value for a region with a smallest area. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. (canceled)
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21. A non-transitory computer readable storage medium storing a program causing a computer to execute the processing of:
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for each of multi-layer regions each containing a pixel of interest and having a successively reducing area, calculating a pixel statistic value of pixels in that region; for each of successive layers, correcting the pixel statistic value for a region at a current layer using a corrected pixel statistic value for a region at a preceding layer having a greater area than that of the region at the current layer; and correcting said pixel of interest using a corrected pixel statistic value for a region with a smallest area.
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Specification