First, scale or resolution of an image are not only important due to their link to the observability of objects or parts of objects. More importantly, by the abstraction in the coarse scales generated by scale-spaces, features in the image, e.g., lines, can be linked directly to objects like roads [35,3,18].
Second, the context and its spatial organization renders a highly effective means to impose structure on the knowledge [32,3,4]. This makes it possible to construct large consistent models and strategies tackling the complexity of the objects.