摘要
首先介绍了小波变换的原理,以及基于小波变换的图像压缩流程。随后选取数字图像开展了小波分解实验,结果表明图像的小波分解与人类视觉系统(HVS)有相似特性。最后设计了数字摄影测量图像的压缩方案,并对数字摄影图像的有损压缩效果展开分析,验证了遥感影像压缩中图像误差与压缩比呈正相关。基于此在使用遥感影像压缩技术时,应合理确定压缩比,从而达到最理想的压缩效果。
Firstly introduces the principle of wavelet transform and the process of image compression based on wavelet transform.Then selected digital images to carry out wavelet decomposition experiments,the results show that the wavelet decomposition of images has similar characteristics with the human visual system(HVS).Finally,a compression scheme of digital photogrammetry images is designed,and the lossy compression effect of digital photogrammetry images is analyzed,and it is verified that the image error in remote sensing image compression is positively correlated with the compression ratio.Based on this,when using remote sensing image compression technology,the compression ratio should be reasonably determined to achieve the most ideal compression effect.
作者
陆德中
李树明
曹晓桢
Lu Dezhong;Li Shuming;Cao Xiaozhen(Lower Changjiang River Bureau of Hydrological and Water Resources Survey,Hydrology Bureau of Changjiang Water Resources Commission,Nanjing 210011,China)
出处
《科学技术创新》
2022年第31期54-57,共4页
Scientific and Technological Innovation
关键词
遥感影像压缩技术
小波变换
数字摄影测量
remote sensing image compression technology
wavelet transform
digital photogrammetry
