Image processing apparatus, image capturing apparatus, and image processing program

An image processing apparatus comprising:

• a processor configured to perform operations including
• obtaining at least a first piece of parallax image data and a second piece of parallax image data from an image capturing element that is at least partly constituted by parallax pixels, each of which includes, in association with one micro-lens, one photoelectric conversion element that corresponds to only one color filter and to only one opening mask;
• and
• correcting, for each pixel output in the first and second pieces of parallax image data, and based on an angle of light incident to each color filter of the parallax pixels, a color imbalance resulting from differences in an amount of light received by the photoelectric conversion elements of the parallax pixels that are caused by differences of at least one of (i) positions of the parallax pixels and (ii) the angle of the light incident on the parallax pixels,
• wherein the opening masks of the parallax pixels pass regions of incident light, while maintaining a relative positional relation with respect to the image capturing element, and
• wherein the first piece of parallax image data and the second piece of parallax image data are from different view points.