Essentials of Mechatronics ISBN: 0-471-72341-X- ©John Billingsley 2006 - published John Wiley & Sons, Inc

12/3/6.htm Edge enhancment with a 'two-way' filter

The starting image is a shade gradient with a lighter diamond added over it.

The object of the image processing is to remove the shading, while sharpening up the edge of the diamond.

We make two copies of the array and smooth the first with the 'low pass' technique of the previous example.

Then we subtract this smoothed array from the original version, adding an overall grey level since the difference has both positive and negative values.

Run sharpen.bas or sharpen.htm