An Approach to Extract L-shaped Feature of Building from VHR SAR Image Using Multi-scale Hough Transform

An approach to extract the L-shaped features of the building from very high resolution(VHR) synthetic aperture radar(SAR) images is proposed.Firstly,a simple geometric model for the L-shaped feature is defined,and an approach based on multi-scale Hough Transform is carried out to extract orientations.And then,a new combination degree function is employed to group linear structures into L-shaped features,and corners of them are determined.Finally,the line width of L-shaped feature is estimated using the imporved scan-line technology.The experimental results on several real airborne VHR SAR images prove that the proposed approach extract the L-shaped features of buildings from VHR SAR images effectively,and the results are in good agreement with the ground truth.