1. An image processor that matches the colors of two images with parallax to each other, the processor comprising: an in-focus area extracting section that extracts an in-focus area of the two images; a color conversion matrix calculating section that obtains a color conversion matrix between the two images by reference to information about the colors of pixels that are included in the in-focus area of the two images; and a color conversion section that converts the color of one of the two images by using the color conversion matrix.