六十年代南极光学影像增强与去噪处理的研究  

Enhancement and Denoising for Optical Images of the 1960s in Antarctic Regions

作　　者：王泽阳[1] 田一翔[1] 孔繁司 叶文凯 

机构地区：[1]同济大学测绘与地理信息学院空间信息科学及可持续发展中心,上海200092

出　　处：《测绘与空间地理信息》2016年第12期41-45,50,共6页Geomatics & Spatial Information Technology

基　　金：国家重大科学研究计划(2012CB957700);国家自然科学基金(41201471)资助

摘　　要：南极地区冰川融化与全球气候变暖的关系是目前气候研究的重点方向之一,但是由于缺乏20世纪60年代及之前相关的遥感及实测数据,因此,20世纪60年代南极地区的光学影像DISP(Declassified intelligence satellite photography)对于研究当时南极地区的物质变化和质量平衡具有重要的参考价值。本文通过选取几种常用的图像处理方法对DISP影像进行增强和去噪处理,同时,采用一种主观和客观相结合的图像质量评价标准对处理结果进行分析和评价。The relationship between Antarctic mass balance and global warming is one of the most important topics of climate research. However, there are a few records before or in 1960s. Declassified intelligence satellite photography （DISP） images captured in 1960s, therefore, are important for Antarctic mass balance research. In this paper, several image processing methods are applied to improve the DISP images＇ quality and remove noise. A comprehensive standard for image quality evaluation is summarized at the same time. Based on experiments, we can conclude that histogram equalization is good to improve the DISP images＇ contrast and increase information. Compared with other denoising methods, median filter is better to remove noise and increase the number of automated matched corresponding points in the enhanced image. Based on above processes, DISP images can be suitable for image matching and ice velocity measurement.

关 键 词：图像去噪 DISP影像 南极 质量评价 

分 类 号：P208[天文地球—地图制图学与地理信息工程]