Pyramid Based Visual Modules

As outlined in Chapter 1, this Chapter will deal almost entirely with a particular class of techniques that seem to play a key role in the early stages of the visual process—namely, techniques for segmenting the image into distinctive parts. Indeed, when we look at a scene, we do not perceive an array of brightnesses; usually, we see a collection of regions separated by more or less well-defined edges. In computer vision, processes that decompose a scene into parts are called segmentation techniques.