Create two new windows and attach the first one to the Source Image menu, and

attach the second to the Destination Image menu. These two windows are 256 by

256 pixels size each. While the first window is used to show the histogram of the

source image, the second one is used to show the histogram of the destination image.

These two windows should be created only once, and you should be sure that you

prevent any further creation of these windows. Use the suitable formulas to calculate

the histogram at every gray level, and show it on these windows. Calculate the

histogram for the gray level image (not for the RGB). The window should be created

only when the appropriate item from the menu is selected. When the user chooses the

menu item “Show Histogram” on either the “Source Image” or “Destination

Image”, the corresponding window will be created.