卫星遥感图像数据压缩质量评价研究

针对高保真高速数据压缩算法的卫星应用,采用客观参数评价和主观评价相结合的方法,对卫星遥感图像数据压缩质量评价进行了较系统的研究。通过四次试验实践表明,主观评价具有相当的客观性,是目前遥感图像数据压缩质量评价中最基本、最有效的方法,科学合理地设计主观评价至关重要;客观参数评价是有益的参考方法,在改善某一压缩方法时,峰值信噪比(PSNR)是个较好的衡量标准;主观评价和客观评价有较好的一致性,主要体现在PSNR、相似度(XSD)和全图局域最大误差(LME)等客观评价参数上。

Study on the Quality Evaluation of Satellite Remote Sensing Image Data Compression System

Combing the method of the subjective evaluation and the external evaluation,the thesis studyed deeply on the quality evaluation of satellite remote sensing image data compression.By four tests and analysis,the thesis drives that the subjective evaluation was high external,and was the most basic and valid method on the quality evaluation of satellite remote sensing image data compression now,designing it properly is important.The external evaluation was useful,and PSNR was a good criterion when improving a compression method.The consistency in the subjective evaluation and the extemal evalution,mainly on the parameter of PSNR,XSD and LME.