1. An image generating apparatus comprising: a correction unit configured to correct point information indicating correspondence between a plurality of pieces of point information indicating feature points of subjects in an image and a plurality of pieces of distance information of the respective pieces of point information so as to reduce the pieces of distance information belonging to a distance range that is longer than a distance indicated by a specific distance information included in the pieces of distance information; an image information generation unit configured to generate image information for expressing a three-dimensional image based on the point information corrected by the correction unit; and a display unit configured to display the three-dimensional image based on the image information generated by the image information generation unit.