THREE-DIMENSIONAL MEASUREMENT APPARATUS, IMAGE CAPTURING APPARATUS, CONTROL METHOD, AND RECORDING MEDIUM

A three-dimensional measurement apparatus determines, with respect to a captured image, a two-dimensional ranging path that is to undergo distance measurement; obtains, with respect to the captured image, distance information including information of subject distances of respective pixels in the captured image, the subject distances being distances to a subject; and derives a three-dimensional path length corresponding to the ranging path along a surface shape of the subject based on subject distances of respective pixels in the captured image that are included in the determined ranging path, and on information of an image capture condition of the captured image.