1. A control method for controlling a skin analysis device, the skin analysis device comprising a camera for obtaining a face image of a subject, a display for displaying the face image of the subject, and a computer, wherein: the control method causes the computer of the skin analysis device to execute: obtaining the face image of the subject; detecting a face part included in the obtained face image; determining a plurality of skin areas each based on a relative position on the face image with resect to the detected face part; determining a target extraction criterion for each of the determined plurality of skin areas based on a position on the face image, wherein the target extraction criterion comprises a value representing at least one of an angle, a thickness and a length of a target; performing filtering processing on the face image using a filter to extract one or more targets that satisfy the determined extraction criterion from the face image, wherein the determined extraction criterion is a property of the filter used in the filtering processing; displaying the one or more extracted targets on the display of the skin analysis device, wherein the one or more extracted targets are displayed on the display while being superimposed over the face image; displaying, on the display, a plurality of target extraction criteria for one of the plurality of skin areas in accordance with the relative position on the face image with respect to the detected face part in such a manner that one of the extraction criteria can be selected; when it is determined that one of the plurality of extraction criteria has been selected, performing filtering processing on the face image to extract a target that satisfies the selected extraction criterion, wherein the selected extraction criterion is a property of the filtering processing; and displaying the extracted target on the display, wherein the extracted target is displayed on the display while being superimposed over the face image.