A new shape-based feature vector

symmetrical edge orientation histogram

for description of main roads in higher resolution aerial images is presented.Based on the topology of edge pixels in image

the proposed feature vector describes the major shape properties of images preferably

and performs invariant with respect to translation

rotation

scaling and illumination variations.Experimental results based on the fuzzy c-mean clustering algorithm show that

the proposed new feature vector gives a good solution for description of main roads in higher resolution aerial images

and can be used to extract seeds of main roads efficiently.