Image processing apparatus, imaging apparatus, image processing method and storage medium

An imaging apparatus comprising:

• an image pickup device configured to output an image signal corresponding to one of colors of a plurality of color filters for each pixel;
• an interpolation unit configured to perform an interpolation process in each of a plurality of defined directions on a mosaic image signal generated by the image pickup device;
• an evaluation unit configured to acquire an evaluation value representing a correlation for each of the defined directions for each of pixels of the image signal having undergone the interpolation process by the interpolation unit;
• and
• an output unit configured to correct the evaluation values for at least one pixel of interest based on the evaluation values for peripheral pixels of the at least one pixel of interest if the at least one pixel of interest satisfies a predetermined condition, and to output an image signal after the at least one pixel of interest is interpolated based on the corrected evaluation values, wherein the predetermined condition includes a condition that the at least one pixel of interest is an isolated point.

An image processing method comprising:

• performing an interpolation process in each of a plurality of defined directions on a mosaic image signal generated by an image pickup device which outputs an image signal corresponding to one of colors of a plurality of color filters for each pixel;
• acquiring an evaluation value representing a correlation for each of the defined directions for each of pixels of the image signal having undergone the interpolation process;
• and
• correcting the evaluation values for at least one pixel of interest based on the evaluation values for peripheral pixels of the at least one pixel of interest if the at least one pixel of interest satisfies a predetermined condition and outputs an image signal after the at least one pixel of interest is interpolated based on the corrected evaluation values,
• wherein the predetermined condition includes a condition that the at least one pixel of interest is an isolated point.

A non-transitory computer-readable storage medium storing a computer-readable program, the program comprising:

• performing an interpolation process in each of a plurality of defined directions on a mosaic image signal generated by an image pickup device which outputs an image signal corresponding to one of colors of a plurality of color filters for each pixel;
• acquiring an evaluation value representing a correlation for each of the defined directions for each of pixels of the image signal having undergone the interpolation process;
• and
• correcting the evaluation values for at least one pixel of interest based on the evaluation values for peripheral pixels of the at least one pixel of interest if the at least one pixel of interest satisfies a predetermined condition and outputs an image signal after the at least one pixel of interest is interpolated based on the corrected evaluation values,
• wherein the predetermined condition includes a condition that the at least one pixel of interest is an isolated point.