1. An image processing apparatus that generates second image data from first image data, the first image data consisting of signals corresponding to a plurality of color components, the apparatus comprising: a first correction unit that generates a first signal of a pixel of interest in the second image data by adding a plurality of signals in the first image data that correspond to the same color component; a second correction unit that generates a second signal of the pixel of interest in the second image data by adding a plurality of signals in the first image data that correspond to different color components; and a mixing unit that mixes the first signal generated by the first correction unit and the second signal generated by the second correction unit based on color information of the pixel of interest.