遥感影像的辐射质量评价方法

An Overview on Radiation Quality Evaluation Methods of Remote Sensing Imagery

针对传统的遥感影像辐射质量评价方法是以人工定性评价为主、缺乏客观和易行的定量评价标准,以及一些客观评价方法大多是从影像辐射质量的某一方面进行考察,不能全面综合地评定遥感影像的辐射质量的问题,该文充分考虑了遥感影像获取、传输以及处理过程中的各种降质因素,对遥感影像的辐射质量评价方法进行系统的总结、归纳和发展,给出了对影像灰度分布、信息量、清晰度、分辨率、噪声、云量、无效像元等多个指标进行评价的方法及其最新发展动态,并总结了基于参考影像的评价方法、多指标综合评价方法。

The traditional method is mainly depending on manual inspection,which is lacking of objective and feasible criteria.And the existing quantitative evaluation methods only consider several aspects of the radiation quality which cannot fully assess the radiation quality of an integral image.Considering the degrade factors of radiation quality in the image capture process,after summarizing and developing the existing methods,we demonstrated the evaluation methods based on image grayscale distribution,entropy,clarity,resolution,noise,cloud,invalid pixel and other factors.At the same time,we also summarized the methods in the cases with reference images.In the end,we introduced the multi-index based comprehensive evaluation methods.