how can calculate the frequency of given gray scale image?...

I am doing split and merge segmentation algorithm for segmentation. In that algorithm first will be determined bimodality parameter using frequency and variance of gray-level input image, but i dont know how to calculate frequency value from an input image...

Answer 1

[Image Analyst]

I assume you mean frequency of intensity rather than spatial frequency. So just use imhist():

[pixelCounts, grayLevels] = imhist(grayImage, 256);