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Remote Sens. 2014, 6(5), 4409-4429; doi:10.3390/rs6054409

Estimation of the Image Interpretability of ZY-3 Sensor Corrected Panchromatic Nadir Data

*  and
School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China
* Author to whom correspondence should be addressed.
Received: 14 March 2014 / Revised: 21 April 2014 / Accepted: 6 May 2014 / Published: 14 May 2014
(This article belongs to the Special Issue Satellite Mapping Technology and Application)
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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.
Keywords: image quality; interpretability; NIIRS; GIQE; linear regression analysis; ZY-3 image quality; interpretability; NIIRS; GIQE; linear regression analysis; ZY-3
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Li, L.; Luo, H.; Zhu, H. Estimation of the Image Interpretability of ZY-3 Sensor Corrected Panchromatic Nadir Data. Remote Sens. 2014, 6, 4409-4429.

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