In a plane of a captured image 202, a gaze-corresponding point 204 corresponding to a user's gaze point with respect to a displayed image is identified. Then, an area of interest 206 is determined based on the identified gaze-corresponding point 204. A space imaging section determines rows or pixel blocks in an imaging plane 208 that include the area of interest 206 and reads out and outputs data in pixel columns included in the rows or pixel blocks prior to other areas.