Image processing device, image processing method and computer readable recording medium

An image processing method comprising:

• acquiring image data generated by an imaging element including sharing blocks arranged two-dimensionally, each of the sharing blocks including multiple adjacent pixels configured to generate signals according to amounts of light received externally and one read circuit that is common to the multiple adjacent pixels and configured to read the signals as pixel values;
• detecting an offset component of a pixel value occurring in the sharing block of interest based on the acquired image data and using pixel values of pixels in a sharing block of interest that is one of the multiple sharing blocks and pixel values of pixels outside the sharing block of interest;
• and
• calculating a correction amount to correct a pixel value of at least one pixel in the sharing block of interest based on the offset component and using the correction amount to correct a pixel value of at least one pixel in the sharing block of interest.

A non-transitory computer-readable recording medium on which an executable program is recorded, the program instructing a processor of an image processing device to execute:

• acquiring image data generated by an imaging element including sharing blocks arranged two-dimensionally, each of the sharing blocks including multiple adjacent pixels configured to generate signals according to amounts of light received externally and one read circuit that is common to the multiple adjacent pixels and configured to read the signals as pixel values;
• detecting an offset component of a pixel value occurring in the sharing block of interest based on the acquired image data and using pixel values of pixels in a sharing block of interest that is one of the multiple sharing blocks and pixel values of pixels outside the sharing block of interest;
• and
• calculating a correction amount to correct a pixel value of at least one pixel in the sharing block of interest based on the offset component and using the correction amount to correct a pixel value of at least one pixel in the sharing block of interest.