lit into three parts:
</p><ol><li>The image strip source to use for the different intensities.</li><li>Source image.</li><li>Result image.</li></ol><img src="application.png" width="485" height="545" alt="Demo application screen shot" /><p>
The image strip source is used to represent the different intensities in the result 
image. You can select the number of images in the strip (the image at the left-hand
edge should be the darkest and the one at the rightmost edge the lightest).  This
image can be scaled 