“…Context is an important factor in different applications in the vision area: character recognition [Toussaint, 1978], target recognition [Forman et al, 1984], image recognition [Mohr and Masini, 1982]. In a vision system, the role of the context is the following [Desvignes et al, 1989]: guiding the research, solving ambiguities, filling gaps, correcting errors, learning.…”