How to find the threshold value for this image?

I want to find the threshold value for this image..... but i don not know how..

Answer 1

[Salaheddin Hosseinzadeh]

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 ;)

Answer 2

[Image Analyst]

Why not use my interactive thresholding app. I just uploaded an updated version today: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862