An image processing device acquires a captured image and a depth image. A region dividing section divides the plane of the captured image into regions by determining distance values indicated by the depth image with respect to a preset threshold value (region-divided image). A compressing section generates and outputs data of a captured image having different levels of detail in the respective regions, with respect to the resolution and the number of gradations representing pixel values of the captured image, according to the result of the region division.