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From: leo junil on 28 May 2010 13:57
unsupervised image segmentation..anyone know where do i start?
From: David Young on 28 May 2010 15:18
If you have the Image Processing Toolbox, the documentation and demos for it have good examples for getting started - just read through them.

Personally, two textbooks I like are Digital Image Processing by Gonzalez and Wintz, and Computer Vision: a Modern Approach by Forsyth and Ponce - they should give you some good ideas.
From: ImageAnalyst on 28 May 2010 15:33
On May 28, 1:57 pm, "leo junil" <topplevill...(a)yahoo.com> wrote:
> unsupervised image segmentation..anyone know where do i start?

-------------------------------------------------
Lots of ways to do unsupervised - I guess that all it requires is no
manual interaction, so that's pretty broad. Here's one way:
http://www.mathworks.com/matlabcentral/fileexchange/25157
If you're just learning, then pick a good textbook, like John Russ's
"Handbook of Image Processing"
Otherwise, if you have a specific image you're playing around with,
post it to an image hosting web site so you can get suggestions.

In general the process is this:
1. apply whatever processing you need so that you can get to a point
where you where you can threshold.
2. threshold: thresholdedImage = originalImage > threshold;
3. do connected components labeling: labeledImage =
bwlabel(thresholdedImage);
4. measure: blobMeasurements = regionprops(labeledImage);
There, that's the gist of image analysis in 4 steps.
Good luck.
From: us on 28 May 2010 16:08
"leo junil" <topplevillage(a)yahoo.com> wrote in message <htp064$ec8$1(a)fred.mathworks.com>...
> unsupervised image segmentation..anyone know where do i start?

1) write an M-function...
2) start the function in the command window...
3) get a cup of coffee or two...
4) come back...
5) see the result(s)...

us
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