Computes a domain object with grey values in which the values encode the direction at each pixel of a grey value transition. If the given grey value is zero then this is the zero crossing direction. More...

Functions
int	WlzGreyCrossingSeqParFn (WlzSeqParWSpace spWSpace, void spData)
	Tests for a grey value crossing using a 3x3 kernel. This function is called by WlzSeqPar(). Given an integer kernel about a given pixel (E): More...

WlzObject *	WlzGreyCrossing (WlzObject inObj, int newObjFlag, int cVal, WlzErrorNum dstErr)
	Uses a 3X3 kernel to examine the given object for transitions (grey value crossings) about the given grey value. Only objects with WLZ_EMPTY_OBJ and WLZ_2D_DOMAINOBJ types are valid. WLZ_2D_DOMAINOBJ objects must have a valid domain and integral (ie WLZ_GREY_INT, WLZ_GREY_SHORT or WLZ_GREY_UBYTE) values. More...

Detailed Description

Computes a domain object with grey values in which the values encode the direction at each pixel of a grey value transition. If the given grey value is zero then this is the zero crossing direction.

Author: Bill Hill

Date: March 1999

Version

Id: 3fea1b20961ed0dfd520332c679d148bf245bc1f

: Address: MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, EH4 2XU, UK.

: Copyright (C), [2012], The University Court of the University of Edinburgh, Old College, Edinburgh, UK.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Functions

Detailed Description