medialaxis.c File Reference

medial axis transform More...

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Detailed Description

medial axis transform

Usage: medialaxis in.pgm distance out.pgm

Description: Medial axis of the binary image X. If x is the center of a maximal ball included in X, then the result R(x) is equal to the smallest distance between x and a point outside X, otherwise it is equal to 0 . The distance is indicated by the parameter distance :

• 0: approximate euclidean distance
• 1: exact quadratic euclidean distance (Saito-Toriwaki's skeleton)
• 2: exact quadratic euclidean distance (Coeurjolly's reduced axis)
• 3: exact quadratic euclidean distance (Rémy-Thiel)
• 4: 4-distance in 2d
• 6: 6-distance in 3d
• 8: 8-distance in 2d
• 26: 26-distance in 3d

The usual discrete distances are denoted by 4, 8 (2D) and 6, 26 (3D). For the euclidean distance, set distance to 0.

Types supported: byte 2d, byte 3d

Category: morpho

Author:

Michel Couprie