Towards a generalized primal sketch

Seeing is probably the leading goal of Computer Vision. Yet, what to see may be more difficult to analyze as it is mainly application-dependent. Hence, if we commonly accept to represent a scene by means of a set of pixels (picture elements), independently of the acquisition process, or the pixels topology, treatments applied on such elements differ greatly according to the approaches. Similarly, biological vision is in agreement with the “sampling” principle of the scene; yet, subsequent treatments are not clearly defined but “global” functions leading to cortical specializations.