One of the other advantage of Histogram s that we discussed in our tutorial of introduction to histograms is contrast enhancement.
There are two methods of enhancing contrast. The first one is called Histogram stretching that increase contrast. The second one is called Histogram equalization that enhance contrast and it has been discussed in our tutorial of histogram equalization.
Before we will discuss the histogram stretching to increase contrast, we will briefly define contrast.
Contrast
Contrast is the difference between maximum and minimum pixel intensity.
Consider this image.