中国激光, 2011, 38 (s1): s114001, 网络出版: 2011-11-28
基于非局部均值的激光雷达距离像去噪算法
Denoising Method for Ladar Range Images Based on Non-Local Means
摘要
提出了一种基于非局部均值(NLM)滤波的相干激光雷达距离像去噪方法,结合滤波后的强度像和原始距离像、背景抑制(B-S)后的中值滤波和NLM滤波等图像融合方法,实现B-S和距离反常抑制。对不同载噪比的相干激光雷达多目标仿真图像进行了去噪处理。比较了Lee滤波等方法处理结果。实验结果表明,采用该方法,能够满足距离像背景噪声抑制、目标上距离值正常和边缘保持三方面要求。
Abstract
A denoising method for coherent ladar range images is proposed based on non-local means (NLM) filtering. Combined with image fusion methods for images such as range image and filtered intensity image, median filter and NLM with background suppression (B-S), B-S and range anomalies can be realized. Image denoising are carried out on simulated coherent ladar multi-target images with different carrier to noise ratios, and the performances are compared with some other methods such as Lee filter. The results show that, the proposed method can satisfy the requirements from the aspects of background noise suppression, normal range values on the target and edge-preservation.
李琦, 夏志伟, 丁胜晖, 王骐. 基于非局部均值的激光雷达距离像去噪算法[J]. 中国激光, 2011, 38(s1): s114001. Li Qi, Xia Zhiwei, Ding Shenghui, Wang Qi. Denoising Method for Ladar Range Images Based on Non-Local Means[J]. Chinese Journal of Lasers, 2011, 38(s1): s114001.