Adaptive Detection and Filtering of Impulse Noise from Laser Scanned Data

According to the distribution of local impulse noise,an adaptive chord deviation method is used to avoid redundant detection or missing of impulse noise at the quick rising,descending or broken line area of data set．It uses median filter to filtering out impulse noise by adaptively tackling the non-impulse-noise data in filter window.Test examples show that the proposed method outperforms some known methods in noise reduction and detail preservation.