1. An image processing apparatus comprising: an acquiring unit configured to acquire a first image of a subject viewed from a first point of view and a second image that is an image of the subject viewed from a second point of view different from the first point of view, wherein the first image and the second image have different blurred states from each other; a processing unit configured to change the blurred state of at least one of the first image and the second image; and a determining unit configured to compare the first image and the second image after the blurred state of at least one of the first image and the second image is changed by the processing unit to determine image regions corresponding to the subject between the first image and the second image.