IMG: gates.tif

This pictured did not turn out well. For this I converted the 3 component images to grayscale. As you can see, the output is a little green. When I took the pictures, I did not take them in "grayscale." I am guessing that the camera tried to compensate for the overpowering color; thus, my source images were not a true representation of the filter. Here is the source image if you want to download the image to try with your program.