Semi-automatic detection of areas

Discussion created by tobymackean on Oct 27, 2013

I am attempting to create shapefiles over a series if landslides visible on a high resolution orthophotos as well as a DEM derived from LIDAR data. There are a lot of them and I am aware that there may be a semi-automated way of digitizing the areas I am looking at,
either through pixel based or object based methods, or something similar!

I Would greatly appreciate anyone's help on how this might be possible!
Thank you for your time