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US 7,454,079 B2Granted
Image processing apparatus, image processing method, program, and computer-readable medium
AssigneeCanon Kabushiki Kaisha
InventorHiroyuki Shinbata
Life of this patent
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Abstract
An image processing apparatus generates, from original image data, low- and high-frequency components of the original image data. By smoothing at least some of the high-frequency components, the second high-frequency component is generated. Image data is generated on the basis of the generated second high-frequency component.
Claims8
An image processing apparatus comprising:
- high-frequency component generating means for generating, from original image data, two-dimensionally distributed low-frequency components and two-dimensionally distributed high-frequency components of the original image data;
- noise attenuation means for smoothing a high-frequency component in the two-dimensionally distributed high-frequency components based on high frequency components within a distance range from the high-frequency component to be processed, the distance range being determined based on a pixel value, corresponding to the high-frequency component to be processed, in the original image data;
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- processed image generating means for generating image data on the basis of the high-frequency component whose noise components are attenuated by the noise attenuation means.
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An image processing method comprising:
- a high-frequency component generating step of generating, from original image data, two dimensionally distributed low-frequency component and two dimensionally distributed high-frequency component of the original image data;
- a noise attenuation step of smoothing high-frequency component in the two dimensionally distributed high-frequency components based on high frequency components within a distance range from the high-frequency component to be processed, the distance range being determined based on a pixel value, corresponding to the high-frequency component to be processed, in the original image data;
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- a processed image generating step of generating image data on the basis of the high-frequency component whose noise components are attenuated in the noise attenuation step.
1 more element
Dependencies are inferred from the claim text.