1. An image processing apparatus comprising: an obtaining unit configured to obtain determination information to determine a degradation characteristic of sharpness of an image formed by an image forming apparatus; a first selection unit configured to select one of a plurality of recovery processing parameters used to recover sharpness of an image, based on the determination information, characteristics of the plurality of recovery processing parameters being different from each other; and a recovery unit configured to perform recovery processing of sharpness on image data using the selected recovery processing parameter, wherein in a case when the degradation characteristics of sharpness are visually and substantially the same in a low frequency range of the image, the same recovery processing parameter is selected.