资源三号影像质量评价及海岸带地物识别能力分析

为了检验资源三号(ZY-3)影像质量,利用印度的IRS P5和德国的RapidEye影像,采用主观和客观评价相结合的评价方法,对ZY-3传感器校正产品进行了质量评价。主观评价结果表明,ZY-3影像表观质量优于IRS P5和RapidEye影像,地物的纹理、边界更加清晰,影像所反映的细节信息更加丰富,在海岸带地物识别方面表现更好。在客观评价方面:ZY-3全色影像灰度动态范围和信息熵等指标均优于IRS P5影像;ZY-3多光谱影像的灰度范围和信息熵等指标与RapidEye影像相比稍差,但各波段之间的独立性要优于RapidEye影像。总的来说,ZY-3影像成像质量较高,海岸带地物识别能力强,在海岸带遥感研究与应用领域具有巨大潜力。

ZY-3 Image Quality Evaluation and Coastal Land Cover Recognition Analysis

To verify the quality of image, we adopted subjective and objective methods to evaluate ZY-3 sensor corrected products using IRS P5 and RapidEye images. Subjective evaluation results showed that ZY-3 image surface quality was better than IRS P5 and RapidEye images. Land Covers＇ texture and boundary were more clear. And the detailed information of images was more abundant. The objective evaluation results showed that the DN＇ s range and entropy of ZY-3 panchromatic images were better than that of IRS P5 images. The DN＇ s range and entropy of each multispectral band of RapidEye images were better than that of ZY-3 multispectral images. But the correlation between the band of ZY-3 multispectral images was smaller than that of RapidEye images. Generally speaking, ZY-3 images had higher image quality and great potentialities in coastal research and application.