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Re: Gaussian Enhancement on Image Histogram [message #45581 is a reply to message #45577]

Tue, 20 September 2005 09:41

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Chintan Raval writes:

> Thank you for your suggestion. One can definitely use FCN but in order
> to obtain a monotonically increasing FCN I need to
> 1) Map the Histogram for 0- 255 levels to 3 sigma of Gaussian PDF
> 2) Obtain the cumulative histogram for this mapping (This will yield
> monotonically increasing function)
>
> If you refer IDL documentation the GaussInt function computes the PDF
> for mean value of 0 and variance of 1(i.e standard deviation of 1). My
> problem is to compute the Gaussian PDF with 3 sigma (standard
> deviation) for a given value of x with mean at 127.
>
> I would appriciate if you can point out how I can achieve this. It
> would be nice if you can provide some example code.

Oh, dear. I was hoping *you* were going to supply the example code. :-(

I'd go over to Craig's site and poke around for Gauss1. That
will allow you to build the Gaussian you are looking for.

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Re: Gaussian Enhancement on Image Histogram By: James Kuyper on Wed, 21 September 2005 07:35
		Re: Gaussian Enhancement on Image Histogram By: raval.chintan on Wed, 21 September 2005 04:04
		Re: Gaussian Enhancement on Image Histogram By: raval.chintan on Tue, 20 September 2005 22:58
		Re: Gaussian Enhancement on Image Histogram By: David Streutker on Tue, 20 September 2005 10:10
		Re: Gaussian Enhancement on Image Histogram By: David Fanning on Tue, 20 September 2005 09:41
		Re: Gaussian Enhancement on Image Histogram By: raval.chintan on Tue, 20 September 2005 09:30
		Re: Gaussian Enhancement on Image Histogram By: David Streutker on Tue, 20 September 2005 08:50
		Re: Gaussian Enhancement on Image Histogram By: raval.chintan on Tue, 20 September 2005 07:30
		Re: Gaussian Enhancement on Image Histogram By: David Fanning on Mon, 19 September 2005 23:27
		Re: Gaussian Enhancement on Image Histogram By: raval.chintan on Mon, 19 September 2005 23:14
		Re: Gaussian Enhancement on Image Histogram By: Jeff N. on Mon, 19 September 2005 12:22
		Re: Gaussian Enhancement on Image Histogram By: Jeff N. on Mon, 19 September 2005 11:01

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