林瑶瑶,唐新明,薛玉彩,艾波

• 1:山东科技大学测绘科学与工程学院
• 2:自然资源部国土卫星遥感应用中心

摘要(Abstract)：

针对高分七号测绘卫星模拟立体像对星上压缩是否满足测图应用需求的问题,本文从影响影像灰度、纹理、相关性等构像质量特征和DSM产品精度两方面进行影像压缩质量评价实验,开展了多种格网尺寸DSM的提取,通过比较不同压缩比下重建与原始影像生成DSM平均高程误差和高程中误差进行DSM产品精度分析。结果表明,对于星上JPEG-LS压缩算法,压缩比不大于4∶1时,压缩后影像灰度特征、纹理信息保持好,影像相关性大于0.997,重建影像峰值信噪比大于50,影像压缩质量好;随着压缩比的增加,DSM产品精度逐渐降低,压缩比不大于4∶1时,DSM高程中误差小于1 m,满足1∶10 000、1∶5 000数字高程模型高程中误差一级要求。本文相关结论可为高分七号星上压缩指标论证提供参考。

关键词(KeyWords)： 遥感影像压缩;构像质量评价;DSM提取;DSM精度评价;高分七号模拟影像

Abstract:

Keywords:

基金项目(Foundation): 战略性国际科技创新合作重点专项(2016YFE0205300);; 国家自然科学青年基金项目(41701427);; 基础测绘科技项目(2018KJ0302)

作者(Author): 林瑶瑶,唐新明,薛玉彩,艾波

DOI: 10.16251/j.cnki.1009-2307.2020.05.025

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