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US 9,432,596 B2Granted
Image processing apparatus and image processing method
AssigneeCanon Kabushiki Kaisha
InventorsYoshitaka Sasaki, Kazuhiro Yahata
Life of this patent
Estimating the term…
Abstract
Noise in RAW image data is reduced by determining parameters including pixels used as a target area and reference pixels in the RAW image data, based on color filter information for the RAW image data. The RAW image data is corrected based on the parameters thus determined.
Claims18
An image processing apparatus comprising:
- a determination unit configured to determine a target pixel and a pixel used as a reference pixel among pixels of a pixel array included in a predetermined area within a predetermined distance from the target pixel in RAW image data, the RAW image data having arrayed pixel values of different color components;
- and
- a generation unit configured to generate corrected image data by correcting a pixel value of the target pixel in the RAW image data, based on a similarity between the target pixel and each reference pixel, wherein
- the target pixel and each reference pixel have pixel values corresponding to one color component, and
- the pixel determined as the reference pixel by the determination unit has a pixel value of the same color component as the target pixel and the pixel array within a predetermined distance from the pixel determined as the reference pixel by the determination unit is the same pixel array within a predetermined distance from the target pixel.
2 more elements
An image processing method comprising the steps of:
- determining a target pixel and a pixel used as a reference pixel among pixels of a pixel array included in a predetermined area within a predetermined distance from the target pixel in RAW image data, the RAW image data having arrayed pixel values of different color components;
- and
- generating corrected image data by correcting a pixel value of the target pixel in the RAW image data, based on a similarity between the target pixel and each reference pixel, wherein
- the target pixel and each reference pixel have pixel values corresponding to one color component, and
- the pixel determined as the reference pixel in the determining step has a pixel value of the same color component as the target pixel and the pixel array within a predetermined distance from the pixel determined as the reference pixel in the determining step is the same pixel array within a predetermined distance from the target pixel.
2 more elements
A non-transitory computer readable storage medium storing a program which causes a computer to perform the steps of:
- determining, a target pixel and a pixel used as a reference pixel among pixels of a pixel array included in a predetermined area within a predetermined distance from the target pixel in RAW image data, the RAW image data having arrayed pixel values of different color components;
- and
- generating corrected image data by correcting a pixel value of the target pixel in the RAW image data, based on a similarity between the target pixel and the reference pixel, wherein
- the target pixel and each reference pixel have pixel values corresponding to one color component, and
- the pixel determined as the reference pixel in the determining step has a pixel value of the same color component as the target pixel and the pixel array within a predetermined distance from the pixel determined as the reference pixel in the determination step is the same pixel array within a predetermined distance from the target pixel.
2 more elements
Dependencies are inferred from the claim text.