| Re: Finding "objects" in images [message #13271 is a reply to message #13183] |
Wed, 28 October 1998 00:00  |
rivers
Messages: 228
Registered: March 1991
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Senior Member |
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In article <F1GFxC.Lus@midway.uchicago.edu>, rivers@cars3.uchicago.edu (Mark Rivers) writes:
>
> I am looking for code to detect "objects" in images. In this specific case I
> am looking for x-ray diffraction peaks in a CCD camera image, but the problem
> is general. I have used the IDL Erode and Dilate functions to clean up the
> data, so that I have adjacent pixels with value=1 inside the "objects" and all
> other pixels=0. I can easily make a list of all of the pixels which are
> inside the objects of interest. There might be hundreds of such pixels.
> But I want to do is to find the objects themselves which contain these adjacent
> pixels. There might only be a few such objects.
>
> I am sure there are lots of people doing this: finding cells or stars or
> whatever in images, and getting shape information about them.
To answer my own post, I found a routine which does exactly what I want at:
http://idlastro.gsfc.nasa.gov/contents.html#C2
It is called FIND.PRO, written by Wayne Landsman. It was designed to find
stars in telescope images, but it works great for finding diffraction peaks
in diffraction images.
____________________________________________________________
Mark Rivers (773) 702-2279 (office)
Argonne National Laboratory (630) 252-0422 (office)
Building 434A (630) 252-0405 (lab)
9700 South Cass Avenue (630) 252-1713 (beamline)
Argonne, IL 60439 (630) 252-0443 (FAX)
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