Image processing apparatus, image processing method, image processing program, and compound eye digital camera

An image processing method comprising the steps of:

• acquiring a plurality of images captured from two or more different viewpoints;
• generating a parallax map in which a parallax represented by a difference between the pixel positions of corresponding pixels of a first image from among a plurality of acquired images and a second image captured from a viewpoint different from the first image corresponds with the pixel position of the first image;
• from among the pixels of the first image corresponding to an attention pixel of the generated parallax map and peripheral pixels in the periphery of the attention pixel, extracting pixels having a difference in color information from color information of a pixel corresponding to the attention pixel of the parallax map within a predetermined range;
• generating the parallax histogram on the basis of the parallax of each pixel of the parallax map corresponding to each extracted pixel;
• and
• correcting the parallax of the attention pixel as a correction target on the basis of the generated parallax histogram.

An image processing program which causes a computer to function as:

• an acquisition unit which acquires a plurality of images captured from two or more different viewpoints;
• a parallax map generation unit for generating a parallax map in which a parallax represented by a difference between the pixel positions of corresponding pixels of a first image from among a plurality of images acquired by the acquisition unit and a second image captured from a viewpoint different from the first image corresponds with the pixel position of the first image;
• a histogram generation unit which, from among the pixels of the first image corresponding to an attention pixel of the parallax map generated by the parallax map generation unit and peripheral pixels in the periphery of the attention pixel, extracts pixels having a difference in color information from color information of a pixel corresponding to the attention pixel of the parallax map within a predetermined range and generates a parallax histogram on the basis of the parallax of each pixel of the parallax map corresponding to each extracted pixel;
• and
• a correction unit which corrects the parallax of the attention pixel as a correction target on the basis of the parallax histogram generated by the histogram generation unit.