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Re: Gradient of an Image [message #33815 is a reply to message #33719]

Fri, 24 January 2003 06:30

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Thomas Gutzler (tgutzler@ee.uwa.edu.au) writes:
>
> I figured out, that Hermann Mannsteins function does what I want. It
> calculates a gradient of an image using the 'Sobel operator' and it does
> it _very_ much faster than my testfunction did (It simply went through
> the array in 2 for-loops and multiplied the subarray with the kernel,
> summed the results and stored them in the final gradient-array).
> convol rox :>

Yes, it looks to me to do *exactly* what the SOBEL function
does. The other gradient operator found in IDL is the ROBERTS function.

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
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[Message index]

		Re: Gradient of an Image By: Thomas Gutzler on Fri, 24 January 2003 00:23
		Re: Gradient of an Image By: meron on Thu, 23 January 2003 23:05
		Re: Gradient of an Image By: David Fanning on Fri, 24 January 2003 06:30
		Re: Gradient of an Image By: meron on Fri, 24 January 2003 00:45

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