1. An image capture apparatus comprising: an image capture unit, including an image sensor in which pixels for photoelectrically converting an object image are two-dimensionally arrayed in correspondence with color filters of a plurality of colors, configured to generate an image signal; a reducing unit configured to reduce the image signal output from the image capture unit to generate a reduced image; an image processing unit configured to perform development processing for the reduced image to obtain a first developed image containing luminance components and color difference components and performing development processing for the image signal output from the image capture unit to obtain a second developed image containing luminance components and color difference components; an enlargement unit configured to enlarge the first developed image to the same size as that of the second developed image; a composition unit configured to perform composition of the second developed image and an enlarged image enlarged by the enlargement unit; and a storage unit configured to store the image signal output from the image capture unit, the reduced image, the first developed image, the second developed image, and the enlarged image, wherein the image processing unit performs the development processing for a partial region of the image signal output from the image capture unit to obtain the second developed image corresponding to the partial region, and after the composition unit has composited the second developed image corresponding to the partial region with the enlarged image corresponding to the partial region, performs the development processing for a remaining region of the image signal output from the image capture unit to obtain the second developed image corresponding to the remaining region.