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Open AccessArticle

Rigorous Co-Registration of KOMPSAT-3 Multispectral and Panchromatic Images for Pan-Sharpening Image Fusion

by Changno Lee 1 and Jaehong Oh 2,*
1
Department of Civil Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
2
Department of Civil Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(7), 2100; https://doi.org/10.3390/s20072100
Received: 24 February 2020 / Revised: 1 April 2020 / Accepted: 6 April 2020 / Published: 8 April 2020
(This article belongs to the Section Remote Sensors)
KOMPSAT-3, a Korean earth observing satellite, provides the panchromatic (PAN) band and four multispectral (MS) bands. They can be fused to obtain a pan-sharpened image of higher resolution in both the spectral and spatial domain, which is more informative and interpretative for visual inspection. In KOMPSAT-3 Advanced Earth Imaging Sensor System (AEISS) uni-focal camera system, the precise sensor alignment is a prerequisite for the fusion of MS and PAN images because MS and PAN Charge-Coupled Device (CCD) sensors are installed with certain offsets. In addition, exterior effects associated with the ephemeris and terrain elevation lead to the geometric discrepancy between MS and PAN images. Therefore, we propose a rigorous co-registration of KOMPSAT-3 MS and PAN images based on physical sensor modeling. We evaluated the impacts of CCD line offsets, ephemeris, and terrain elevation on the difference in image coordinates. The analysis enables precise co-registration modeling between MS and PAN images. An experiment with KOMPSAT-3 images produced negligible geometric discrepancy between MS and PAN images. View Full-Text
Keywords: KOMPSAT-3; AEISS; co-registration; pan-sharpening; image fusion KOMPSAT-3; AEISS; co-registration; pan-sharpening; image fusion
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Lee, C.; Oh, J. Rigorous Co-Registration of KOMPSAT-3 Multispectral and Panchromatic Images for Pan-Sharpening Image Fusion. Sensors 2020, 20, 2100.

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