PURPOSE: To produce a histogram showing the features of each discontinuous segment pattern and discriminating automatically the type of each graphic, by applying the huff conversion to each of discontinuous segment graphics sorted into groups for each length of each element.
CONSTITUTION: The coordinates on an X-Y plane of the start and end points ST and ED are detected for each element of discontinuous segment graphics α, β and γ. While the subject graphics are sorted into groups based on the length of each element. Then graphics α, β and γ are huff-converted onto a ρ-θ plane, and the element of the largest length is extracted from each huff- converted graphic. Then each element which satisfies the prescribed conditions related to an angle is extracted again. Finally the elements excluded out of the huff-converted groups are neglected, and both start and end points of said graphics are calculated out of the points ST and ED of each element in each group. Then a histogram showing the number of features to the length of each element is produced for each group.
NISHIKAWA KATSUHIKO
MURANO TOMOMITSU
