Name: WlzCannyDeriche - implements a Canny/Deriche edge detection filter.

Synopsis

WlzCannyDeriche [-o<output object>] [-h] [-o] [-a#] [-d] [-e] [-g]
                [-m#] [-l#] [-u#] [<input object>]

Options

-h	Help, prints usage message.
-o	Output object file name.
-a	Deriche's alpha parameter.
-d	Output object with edge direction encoding.
-e	Output object with edge gradients.
-g	Output object with all gradients.
-m	Filter multiplier parameter.
-l	Lower hysteresis threshold value.
-u	Upper hysteresis threshold value.

Description: Applies a Canny/Deriche edge detection filter to a Woolz domain object with grey values. The input object is read from stdin and the filtered object is written to stdout unless the filenames are given.

Examples

WlzCannyDeriche -e -a 1.0 -l 15 -u 40 -m 10 -o edges.wlz in.wlz

The input Woolz object is read from in.wlz, and filtered using a Deriche edge operator with alpha=1.0, gradients are multiplied by 10.0 before non-maximal suppression or hysteresis thresholding. The hysteresis threshold values of 15 and 40 are used to threshold the edge image which is written to edge.wlz.

File: WlzCannyDeriche.c

See Also: WlzIntro(1) WlzCannyDeriche(3)