Adjusting image intensity values <p>I came to the <a href="http://www.mathworks.fr/fr/help/images/ref/imadjust.html" rel="nofollow">imadjust</a> function in <code>MATLAB</code>. It seems that this function enhances the contrast of the image. But, what is the theoretical basis for this function? In other words, if I say that this function as mentioned in the documentation adjusts the image intensity values, what does this exactly mean? What is it doing to the intensity values?</p> <p>Thanks.</p>