JPEG2000和JPEG-LS对遥感影像压缩构像质量的影响  

The Impact of JPEG2000 and JPEG-LS on the Quality of Remote Sensing Image Compression

作　　者：林瑶瑶 高飞[1] 林清莹 刘东顺 LIN Yaoyao;GAO Fei;LIN Qingying;LIU Dongshun(Ji′nan Research Institute of Geotechnical Investigation&Surveying,Ji′nan 250013,China)

机构地区：[1]济南市勘察测绘研究院,山东济南250013

出　　处：《测绘与空间地理信息》2022年第8期122-125,129,共5页Geomatics & Spatial Information Technology

摘　　要：图像压缩质量评价是调整压缩算法相关参数、评判不同压缩算法效能的重要途径。本文通过提取原始和不同压缩倍率下遥感影像的灰度均值、标准差,影像信息熵、角二阶距和对比度来分析JPEG2000和JPEG-LS对影像压缩构像质量的影响。实验结果表明,压缩倍数越高,影像灰度、纹理信息损失越多;JPEG2000和JPEG-LS分别造成影像的模糊失真和间接性失真;整体上,相同压缩比时,相比较JPEG-LS,JPEG2000压缩后影像灰度与纹理信息与原始影像差异小,影像灰度、纹理信息损失程度小。Image compression quality evaluation is an important way to adjust the relevant parameters of compression algorithm and evaluate the effectiveness of different compression algorithms.In this paper,the influence of JPEG2000 and JPEG-LS on image compression quality was analyzed by extracting gray mean,standard deviation,image information entropy,angle second-order distance and contrast of original and different compression ratio images.The experimental results show that the higher the compression ratio,the more loss of image gray and texture information.JPEG2000 and JPEG-LS cause blur distortion and indirect distortion respectively;On the whole,when the compression ratio is the same,compared with JPEG-LS,the advantage of JPEG2000 compression is the image gray scale and texture information are less different from the original image,and the loss degree of image gray scale and texture information is small.

关 键 词：JPEG2000 JPEG-LS 影像压缩 影像灰度 影像纹理 构像质量评价 

分 类 号：P237[天文地球—摄影测量与遥感] TP751[天文地球—测绘科学与技术]