how to inner product two images......

inner product two images and then if each pixel value is greater than some threshold level put '1' in the pixel or else if it is zero then put '0'

Answer 1

[Image Analyst]

I don't know what inner product has to do with it, but for the latter half of your question, you're describing thresholding. So to do that you do this:

binaryImage = grayImage > thresholdValue;

Answer 2

[Bjorn Gustavsson]

Inner product ought to be somethinhg like this (assuming gray-scale image):

img_inner_product = im1(:)'*im2(:);