Automatic Water Body Extraction Based on LiDAR Data and Aerial Images

A new approach of automatic water body extraction based on LiDAR data and aerial images is proposed.The LiDAR intensity image and aerial images are co-registrated by SIFT operator.Transformation parameters from LiDAR image to aerial image can be computed by the matched conjugated points.Black regions that have no reflection on height image generated by LiDAR data are automatically extracted.Geometric constraint conditions are used to remove non-water body areas.Edge information is used for region growing with the projected inilial position as initial value.Finally,mathematical morphology techniques are used to get more precise water body areas.Experimental results show that the proposed approach can achieve very good water body information.