1. A system comprising: a target apparatus comprising at least one illumination target element having a plurality of different known surface normals, and a set of color target elements having known colors; an imaging device; and a processor, the processor being configured to (a) extract at least a partial environment map of global illumination, of a scene including the target apparatus, from a single image of the scene that is imaged by the imaging device; (b) capture respective colors for the set of color target elements from the image of the scene; (c) determine expected colors for the set of color target elements based at least on the known colors of the set of color target elements and the extracted partial environment map; and (d) calculate color transformation parameters based on differences between the expected colors and the captured colors for the set of color target elements.