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Fast region detection

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Milan

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Jul 28, 2004, 11:39:56 AM7/28/04
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Hi All,

I'm looking for some fast algorithms for region extraction in real-time
applications. For example, I hope to extract a patch of pixels with similar
colors (say red), but these pixels may be subject to uneven lighting. I know
I can use hysteresis thresolding method to extract the pixels iteratively,
but it is painfully slow. What is a better way to accomplish this? Thanks.

Regards,
Milan.


Yaniv Taigman

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Jul 30, 2004, 3:41:15 PM7/30/04
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"Milan" <som...@internet.com> wrote in message news:<ce8hcd$p5...@imsp212.netvigator.com>...

Hi Milan,
First of all, look for Segmentation alg. for features extraction,
it's well defined in Gonzales's "Digital Image Processing using
Matlab" 2004.

A trivial, quiet efficient, segmentation would be to find the
requested object (i.e: run for each (x,y) and check isSimilar). Once
reached a similar color,
label the pixel and use recursion (4-ways) to label its neighbourhood.
This example is, I think, demonstrated in the book.

Yaniv Taigman.

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