摘要
合成孔径雷达图像固有的相干斑噪声严重降低了图像的可解译程度,影响了后续目标检测、分类和识别等的应用。本文对SAR图像的相干斑抑制问题进行了分析,总结了目前已有的相干斑抑制算法的主要思路,介绍了具有代表性的算法,并对这些方法进行比较分析,得出单个滤波器很难从去噪和边缘保持方面均达到最佳的结论。
Speckle,appearing in synthetic aperture radar（SAR） images as granular noise,is generated by the coherent processing of radar signals.It severely affects the image qualities.To alleviate deleterious effects of speckle,various ways have been devised to suppress it.this paper investigates the problem of speckle suppression comprehensively and thoroughly.It describes the general approaches of speckle reduction filtering,discusses several well-known speckle reduction filter,and compares the algorithms qualitatively.We can conclude that it is difficult to smooth speckle and preserve edge at same time by single filter.
出处
《北京测绘》
2011年第3期17-19,34,共4页
Beijing Surveying and Mapping
关键词
SAR
斑点噪声
统计模型
图像去噪
小波变换
评价标准
SAR
speckle noise
statistical model
image denoising
wavelet transform
evaluation criteria
