I am working on color image steganorgaphy. I need a threshold calculation procedure or a method.
You can use the Otsu threshold
In matlab you can use following code to find Otsu Global thresholding for an image (I).
ThreholdValue = graythresh(I);
Then you can binarize the image like this:
binaryImage = im2bw(I,ThreholdValue);
If you work with matlab
u can calculate it with mean of pixel on the image. but first to do is make ur image become gray first. rgb to gray -> (0.7,0.2,0.1) = rgb. the total must be 1. after become gray image u can use many logic to determine the threshold of image.
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