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Re: Gaussian Enhancement on Image Histogram [message #45568 is a reply to message #45563]

Wed, 21 September 2005 04:04

raval.chintan
Messages: 54
Registered: May 2005

Member

David Fanning wrote:
> 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.

Thank You David, I have find it on Craig's Web site , Now it is working
fine.

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

Regards
Chintan

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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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