HOW to get threshold value by looking at its histogram?

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fatin rasyidah on 26 Dec 2017

Commented: Image Analyst on 27 Dec 2017

Image Analyst on 26 Dec 2017

Look for unusual places or features in it, like a valley between humps, "corners" in skewed humps, etc.

fatin rasyidah on 27 Dec 2017

for this image and histogram, how can I decide the threshold value?

Image Analyst on 27 Dec 2017

Looks like there might be one around15 or 20, and another one around 175. Use my interactive thresholding app to see. https://www.mathworks.com/matlabcentral/fileexchange/29372-thresholding-an-image

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