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Summary -3D models of vegetation have been constructed to allow various simulations, such as the interception of incoming radiation, radiative transfer, reflectance simulation in remote sensing, study of plant function, and interspecies competition. The construction of such 3-D models is based upon simple geometric assumptions and several production rules (eg, growing, branching

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A method for segmenting colored iniages based on contour tletectioti is designed. It involves the use of techniques tiaseri O H nbriipt change detection used iii signal processing arid coritrol system. This \cork is based oti a theoretical fr-atiiervork : diferential geometq, tensors, ,Ve~~man-Pearsori's optimal decision. Good resitlts are obtained with gaiissiati and exporieritial noises. This method provides a veri, good location of contours.