Putpixel allows the user to select a window to display the actual pixel values of an image.
The features provided by putpixel include:
putpixel can be executed from the command line user interface (CLUI):
putpixel -i input.filename
If you wish to use the Graphical User Interface then type:
putpixel -guiand wait till you see the graphical user interface. Then make your selections.
GUI for putpixel