I have to do object based road extraction. First, a road has been segmented. Then, classification has to be done to separate roads and non-roads( such as buildings, parking lots).
Did you already pick an logarithm from here http://iris.usc.edu/Vision-Notes/bibliography/contentscartog.html#Cartography,%20Aerial%20Images,%20Remote%20Sensing,%20Buildings,%20Roads,%20Terrain,%20ATR? We don't do that part for you.