dilatball.c File Reference

Detailed Description

Usage: dilatball in.pgm r [dist] out.pgm

Description: Morphological binary dilation by a metric ball. If the parameter r is a positive integer, then the structuring element for this dilation is a ball (or a disc) of radius r. In this case the result of the dilation is defined by Y = {x; d(x,X) <= r} where X represents the original point set (non-null pixels in the original image). If the parameter r is -1, then the structuring element for each point x is a ball (or a disc) of radius F(x), where F is the greyscale image in.pgm .

The dilation is computed by thresholding a distance map. The distance used depends on the optional parameter dist (default is 0) :

• 0: approximate euclidean distance
• 1: approximate quadratic euclidean distance
• 2: chamfer distance
• 3: exact quadratic euclidean distance
• 4: 4-distance in 2d
• 8: 8-distance in 2d
• 6: 6-distance in 3d
• 18: 18-distance in 3d
• 26: 26-distance in 3d

Warning:

The input image in.pgm must be a binary image. No test is done.

Category: morpho

Author:

Michel Couprie 2002

dilatball cells 4 cells_dilatball

cells	cells_dilatball

Generated on Fri Dec 17 11:59:37 2004 for Pink by 1.2.18