Trees vertex recognition device and program of trees vertex recognition trees and vertex recognition method

摘要

PROBLEM TO BE SOLVED: To provide a tree vertex recognition device capable of automatically recognizing the vertex of a single tree.;SOLUTION: A tree height computation section 14 computes differences Zci (Zci, Zci, ...) between DSM and DEM data to obtain tree height grid data Di (D1, D2, ...). An image filter 16 sequentially averages the data in the 3×3 ranges. A ridge - valley degree computation section 17 prepares "ridge - valley degree" data to decide the steric features of tree crown. Moreover, a local maximum filter 20 is applied for the ridge - valley degree data Dei. A tree vertex candidate extraction section 21 extracts vertex candidates. A tree crown upper part extraction section 23 provides a threshold corresponding to the state of forest for the ridge - valley degree data Dei, to extract tree crown upper part data. A tree vertex determination section 25 determines the maximum tree height based on the crown upper part data, and takes it as a tree vertex.;COPYRIGHT: (C)2008,JPO&INPIT