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how to get binary image from histogram?

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Ibrahim Thorig
Ibrahim Thorig on 13 Mar 2014
Commented: Image Analyst on 14 Mar 2014
I'm new to matlab. Some on please help me to obtain binary segmentation form histogram.
thank you

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Answers (1)

Image Analyst
Image Analyst on 13 Mar 2014
You pick a threshold and then do
binaryImage = grayImage < thresholdValue;
if you want any more advice, post an image and say what you want to find or measure. The threshold can be chosen form the histogram, for example from my interactive thresholding application: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

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Image Analyst
Image Analyst on 13 Mar 2014
I don't know what a history gram is. Can you explain it? And what part of the image do you want to be true and what part to be false?
Ibrahim Thorig
Ibrahim Thorig on 14 Mar 2014
sorry its histogram, initially generate histogram of the image, then remove background, so the only white area (image) should show.
Image Analyst
Image Analyst on 14 Mar 2014
[pixelCounts, grayLevels] = imhist(grayImage, 256);
binaryImage = grayImage < 128;
Do the above thresholding for each color channel and then AND the 3 binary images to get the overall binary image for the color image.

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