1. An image processing device configured to correct color information of an image having a state in which MTF characteristics are mismatched between a plurality of color components due to misalignment of foci of the color components in a direction of an optical axis, the image processing device comprising: a controller configured to correct component having low MTF characteristics using color information of a color component having high MTF characteristics to match MTF characteristics between the color components, the controller being configured to: (1) smooth a signal of the color component having high MTF characteristics, and (2) correct MTF characteristics of the color component having low MTF characteristics based on correction information obtained from a difference between a non-smoothed signal of the color component having high MTF characteristics and a smoothed signal of the color component having the high MTF characteristics, such that MTF characteristics between each color component are matched.