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School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China





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Abstract Image quality is important for taking full advantage of satellite data. As a common indicator, the National Imagery Interpretability Scale NIIRS is widely used for image quality assessment and provides a comprehensive representation of image quality from the perspective of interpretability. The ZY-3 Ziyuan-3 satellite is the first civil high resolution mapping satellite in China, which was established in 2012. So far, there has been no reports on adopting NIIRS as the common indicator for the quality assessment of that satellite image data. This lack of a common quality indicator results in a gap between satellite data users around the world and those in China regarding the understanding of the quality and usability of ZY-3 data. To overcome the gap, using the general image-quality equation GIQE, this study evaluates the ZY-3 sensor-corrected SC panchromatic nadir NAD data in terms of the NIIRS. In order to solve the uncertainty resulting from the exceeding of the ground sample distance GSD of ZY-3 data 2.1 m in GIQE less than 2.03 m, eight images are used to establish the relationship between the manually obtained NIIRS and the GIQE predicted NIIRS. An adjusted GIQE is based on the relationship and verified by another five images. Our study demonstrates that the method of using adjusted GIQE for calculating NIIRS can be used for the quality assessment of ZY-3 satellite images and reveals that the NIIRS value of ZY-3 SC NAD data is about 2.79. View Full-Text

Keywords: image quality; interpretability; NIIRS; GIQE; linear regression analysis; ZY-3 image quality; interpretability; NIIRS; GIQE; linear regression analysis; ZY-3





Autor: Lin Li, Heng Luo * and Haihong Zhu

Fuente: http://mdpi.com/



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