WlzSobel.c File Reference

Implements a Sobel edge detection filter. More...

Functions
WlzObject *	WlzSobel (WlzObject *srcObj, int hFlag, int vFlag, WlzErrorNum *dstErr)
	Applies a Sobel edge detection filter to the given woolz object. More...

Detailed Description

Implements a Sobel edge detection filter.

Author

Bill Hill

Date

March 1999

Version

Id

eb7e75fdde303c26724dd4b520d1254979b50504

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.

Function Documentation

WlzObject* WlzSobel	(	WlzObject *	srcObj,
		int	hFlag,
		int	vFlag,
		WlzErrorNum *	dstErr
	)

Applies a Sobel edge detection filter to the given woolz object.

Returns

Sobel filtered object.

Parameters

srcObj	Given source object.
hFlag	Apply horizontal edge kernel if non-zero.
vFlag	Apply vertical edge kernel if non-zero.
dstErr	Destination error pointer, may be NULL.

References _WlzValues::core, _WlzDomain::core, _WlzConvolution::cv, _WlzConvolution::divscale, _WlzObject::domain, _WlzConvolution::linkcount, _WlzConvolution::modflag, _WlzConvolution::offset, _WlzObject::type, _WlzCoreValues::type, _WlzConvolution::type, _WlzObject::values, WLZ_2D_DOMAINOBJ, WLZ_BO_ADD, WLZ_CONVOLVE_FLOAT, WLZ_CONVOLVE_INT, WLZ_DBG, WLZ_DBG_LVL_1, WLZ_DBG_LVL_FN, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_GREY_DATA, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_ERR_VALUES_NULL, WLZ_GREY_DOUBLE, WLZ_GREY_FLOAT, WLZ_GREY_INT, WLZ_GREY_RGBA, WLZ_GREY_SHORT, WLZ_GREY_UBYTE, WlzAssignObject(), WlzConvertPix(), WlzConvolveObj(), WlzFreeObj(), WlzGreyTableTypeToGreyType(), WlzImageArithmetic(), _WlzConvolution::xsize, and _WlzConvolution::ysize.