Affiliation: | 1. Forestry Dept. and Computer Graphics Center , North Carolina State University , Raleigh, North Carolina, 27695–7106, U.S.A.;2. Computer Graphics Center, Forestry Dept. and Dept. of Elect, and Computer Eng., , North Carolina State University , Raleigh, North Carolina, 27695–7106, U.S.A.;3. Plant Pathology Dept. , North Carolina State University , Raleigh, North Carolina, 27695–7106, U.S.A.;4. Radian Corp. , Research Triangle Park, North Carolina, 27516, U.S.A. |