1. An imaging robot for use with a first imaging device for imaging a surface, comprising: a positioning system including a support for supporting the first imaging device; and mutually orthogonal first, second, and third linear translators coupled to the support, for positioning the first imaging device in front of the surface at a plurality of shooting positions forming a two-dimensional grid of positions spaced from the surface at a substantially same shooting distance; and a controller for providing control signals to the first, the second, and the third translators for positioning the first imaging device and for causing the first imaging device to capture a component image of a portion of the surface at each of the shooting positions.