This program allows you to determine the pixel count of the perimeter and area covered of an arbitrary self-defined polygon.
 
To do so, follow the steps, below, in sequence:

Click "Step 1" first.  This will allow you to click the corners of an arbitrary polygon.  All corners must be within this yellow box.

When you have created all of the corners, click "Step 2" to close up the polygon.

To run the calculations, click "Step 3."

To reset the program, click the last button, "Reset," below.

If you make a mistake, you will have to start over by clicking "Reset" and then clicking "Step 1."