Woolz Image Processing  Version 1.7.0
WlzGreyGradient
Name
WlzGreyGradient - computes a grey gradient object from the input object.
Synopsis
WlzGreyGradient [-o<output object>] [-h] [-o] [-g] [-d] [-m#] [-p#]
                [<input object>]
Options
-h Help, prints usage message.
-o Output object file name.
-g Use approximate Gaussian filter.
-d Use Deriche filter.
-p Filter parameter for Gaussian (sigma) and Deriche (alpha) filters.
-m Extra multiplication factor for gradient grey levels.
Description
Computes a grey gradient object from the input object. The input object is read from stdin and the gradient object is written to stdout unless the filenames are given.
Examples
WlzGreyGradient -d -m 2.0 -o grad.wlz in.wlz
The input Woolz object is read from in.wlz, and the grey gradient image is computed using a Deriche filter and an additional multiplying factor of 2.0. The gradient object is written to grad.wlz. Objects with unsigned byte grey values will be promoted to short grey valued objects.
File
WlzGreyGradient.c
See Also
WlzIntro(1) WlzCannyDeriche(1) WlzGreyCrossing(1) WlzGreyGradient(3)