MATLAB: How to separate the foreground from the background in an image

backgroundforegroundImage Processing Toolboximage segmentation

Hi,

I am working on a project related to image matting. I am trying to separate the foreground of an image from the background. Can anybody please help?

Best Answer

See my Image Segmentation Tutorial, BlobsDemo: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

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MATLAB: How to improve segmentation of these images

Did you try the Color Thresholder on the Apps tab of the tool ribbon? Set it up for hsv color space and tell it to find green blobs and then export the code. Do you need the whole ant, or just need to know how many green blobs there are? It could get tricky if some of the ants touch each other, connecting the blobs.

MATLAB: Problem in thresholding an image

Like this:

foregroundImage = yourImage < threshold; % Can use <= if you want.

The foreground will be black (this is opposite to the normal way of foreground being white).

If your image has teh "foreground" as 0 and background as 1, then you'd do this:

foregroundImage = yourImage == 0;

but in that case it sounds like your image has already been thresholded.

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MATLAB: How to improve segmentation of these images

MATLAB: Problem in thresholding an image

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