How to find the threshold value for this image?

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nurul hafizah
nurul hafizah 2015-5-7
编辑： Salaheddin Hosseinzadeh 2015-5-7
I want to find the threshold value for this image..... but i don not know how..

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回答（2 个）

Salaheddin Hosseinzadeh
编辑：Salaheddin Hosseinzadeh 2015-5-7
Hey Nurul,
I am not sure what exactly you want to threshold, so here is a general solution.
Step1 : Convert this to grayscale image, either using rgb2gray() or other appropriate functions.
Step2 : Examine the histogram of the image using imhist(), and identify the threshold value.
Step3 : Just threshold it!
I hope it helps ;)
Image Analyst
Image Analyst 2015-5-7
Why not use my interactive thresholding app. I just uploaded an updated version today: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

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