1. An image measurement apparatus, comprising: an image capturing part that image-captures an object; a movement mechanism that changes an image capturing position of the image capturing part to the object; and a calculation part that calculates a correction value from a first captured image group acquired by placing the image capturing part static at each of a plurality of image capturing positions and a second captured image group acquired by relatively moving the image capturing part so as to pass each of a plurality of the image capturing positions, the first captured image group and the second captured image group being captured image groups of images captured at a plurality of the predetermined image capturing positions by the image capturing part.