Image Processing Apparatus, Image Processing Method, and Imaging Apparatus

An image processing method comprising:

• acquiring an input image captured via an optical system;
• and
• reading a coefficient set correspondingly to a position of a target pixel set referred to in the input image from a storage unit configured to store therein a coefficient set designed through learning for each of positions of respective pixel sets referred to in a convolution such that a result of the convolution referring to a second image with the coefficient set is brought nearer to a first image, the second image being obtained by deteriorating the first image through a specific deterioration process;
• and
• generating an output image by convoluting the target pixel set with the coefficient set.

An imaging apparatus comprising:

• an image capturing device configured to convert incident light into an image;
• at least one lens configured to guide light from a subject to the image capturing device;
• a color filter array provided between the image capturing device and the lens;
• an acquisition unit configured to acquire the image captured by the image capturing device as an input image;
• a storage unit configured to store therein a coefficient set designed through learning for each position of pixel sets referred to in a convolution such that a result of the convolution referring to a second image with the coefficient set is brought nearer to a first image, the second image being obtained by deteriorating the first image through a specific deterioration process;
• and
• a convolution unit configured to
• read the coefficient set from the storage unit correspondingly to a position of a target pixel set in the input image, and
• generate an output image by convoluting the target pixel set with the coefficient set, wherein
• the convolution unit is configured to read the coefficient set determined by the position of the target pixel set from the storage unit, the position of the target pixel set being defined by a position of the pixel set in the input image and
• by colors of color filters provided to the optical system.