Abstract:

Applications of BP network and fractional dimension were introduced. Fractional characters such as fractional dimensions of gray scale image surface and tree crown contour ,and 4 directional fractional dimensions in different directions, and shape characters of tree crown such as the height of tree crown and 8 crown breadths in 8 equal division place were employed to recognize the tree crown. And a tree crown recognition system was established in which there are 15 nodes of tree crown features and image fractional dimensions in the input layer, 6 nodes of tree crown types in the output layer and 1 node in the implicit layer. The experiment showed that the system could recognize the tree crown precisely.

Key words: ANN, Tree crown, Recognition, Fractional dimension