1. An image processing apparatus, comprising: a region division section that divides a captured image obtained by an imaging section positioned directed toward the ground into a plurality of regions; and an image compression section that, of each region image resulting from division by the region division section, performs compression for a region image captured at an angle greater than or equal to a threshold value from an optical axis of the imaging section, using a smaller compression rate the smaller an angle from the optical axis at which a region image is captured, and performs compression for a region image, captured at an angle less than a threshold value from the optical axis, using a compression rate larger than a compression rate of a region image captured at an angle from the optical axis, that is an angle of the threshold value, the smaller an angle from the optical axis at which a region image is captured.