【作者】 陈晓清； 庄钊文； 马君国； 付强；

【Author】 Chen Xiaoqing~(1,2),Zhuang Zhaowen~1,Ma Junguo~1,Fu Qiang~1 1.ATR Lab.,National University of Defense Technology,Changsha 410073,China 2.Institute 8358,Spaceflight Science and Industry Corp.,Tianjin 300192,China

【机构】 国防科技大学ATR实验室； 航天科工集团三院八三五八所；

【摘要】 本文阐述了相干激光雷达距离像的噪声机理,分析了应用传统中值滤波方法抑制距离反常的缺陷,提出了基于排序差分和自适应中值滤波的距离像距离反常抑制方法,首先对较大滤波窗口内的像素值进行排序差分;然后选择低于门限的长度最长的连续差分值对应的像素值作为距离正常值,其它像素值就是距离反常噪声;最后对距离反常的当前像素进行自适应中值滤波。实验结果表明,该方法有效地抑制了距离反常噪声,较好地保护了距离像中目标的边缘细节。更多还原

【Abstract】 Noise mechanism of coherent laser radar range image is demonstrated in this paper.Shortcoming using traditional median filtering to suppress range anomalies is analyzed.Range anomalies suppression method of range image based on sorting-difference and self-adaptive median filtering is put forward.Firstly,sorting and difference is carried out for pixels within larger filtering window.Secondly,pixels corresponding to continuous difference values of maximum length below threshold are regarded as range normal values,other pixels are range anomalies noises.Finally, self-adaptive median filtering is carried out for range anomalies pixel.Experimental result shows:range anomalies noises are suppressed efficiently using this method,edge and detail of object in range image are well protected.更多还原