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Re: Help Finding Sources (Peaks) in an Image [message #65750 is a reply to message #65741]

Fri, 20 March 2009 12:40

ben.bighair
Messages: 221
Registered: April 2007

Senior Member

On Mar 20, 2:28 pm, einszweil...@gmail.com wrote:
> I have a 2D image that I've read into IDL. I'm trying to write a
> procedure to locate all of the "peaks" (i.e.highest intensities) of
> the image.
>
> I suppose I'm defining a "peak" as any pixel that has a higher
> intensity than any of it's surrounding r pixels, where r is some sort
> of "radius" around the pixel (not necessarily a circular region).
> Maybe r = 4 or something
>
> After scanning through the image I'd like the procedure to either
> print out the pixel locations and/or create circles around them on the
> image itself.
>
> Does anyone have any ideas? I mean, I'm not asking you to write up a
> whole procedure for me unless you want to be really helpful. But any
> hints or tips on what functions, etc. I could use would be extremely
> helpful. Or just a quick few lines of code I could build off of would
> be great.
>
> Thanks in advance!

Hi,

A search on Google (for this newsgroup) for "local maxima" found
this...

http://tinyurl.com/d5d7kx

That might be a good start.

Cheers,
Ben

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		Re: Help Finding Sources (Peaks) in an Image By: TonyL on Sat, 21 March 2009 23:59
		Re: Help Finding Sources (Peaks) in an Image By: ben.bighair on Fri, 20 March 2009 12:40

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