Extract Digitising Session

This image shows a typical digitising session using the extract system. The original image is in the background and the user has selected an interesting area and started digitising. The menu in the bottom left corner shows preprocessing options and the contrast stretch histogram is displayed in the top right. The window in the bottom right shows the digitising parameters. The feature shown has been digitised with just five mouse clicks.

(Extract in use)

Text and images by Mark Dobie, back to Mark's home page