1. A method for processing an image, the method comprising: calculating a vanishing point located at a same position in a plurality of images that are temporally successive; receiving specification of a target object whose privacy is to be protected in at least one of the plurality of images; calculating a target location area, which includes the vanishing point and in which the target object is located in each of the plurality of images, on the basis of the specification of the target object in the at least one of the plurality of images received in the receiving and the vanishing point calculated in the calculating the vanishing point; and performing image processing for protecting privacy in an area in each of the plurality of images located at a same position as the target location area calculated in the calculating the target location area.