1. An image processing apparatus comprising: a first detection unit adapted to detect an area of a first detection subject from an image; a second detection unit adapted to detect, from an image, an area of a second detection subject that allows for an estimation of the area of the first detection subject; a correction unit adapted to correct a location of the area of the first detection subject detected by the first detection unit; a setting unit adapted to set an evaluation area based on the area of the first detection subject; and a control unit adapted to perform at least one of a focus detection control, an exposure control, and a color control based on a signal of an image corresponding to the evaluation area, wherein the correction unit corrects the location of the area of the first detection subject based on information about the area of the second detection subject corresponding to the area of the first detection subject detected by the first detection unit.