How to select better threshold value for image ???

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nayomi ranamuka 2011-5-21

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Dear all,

    I've a collection of  images with different illumination.
When I apply segmentation for images the result depend on the threshold value.
How should I get the better threshold value for image ??

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Answer 1

Image Analyst 2011-6-5

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There is no "right" threshold or method to find one. You have to try a bunch of methods on your images and see which ones you think work best for your particular images.

Here's a list of some of them: http://pacific.mpi-cbg.de/wiki/index.php/Auto_Threshold

or you can manually threshold the image with my GUI manual threshold app: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862