A Modulation Transfer Function Compensation for the Geostationary Ocean Color Imager (GOCI) Based on the Wiene Filter SCOPUS KCI

Title
A Modulation Transfer Function Compensation for the Geostationary Ocean Color Imager (GOCI) Based on the Wiene Filter
Author(s)
Oh, E.; Ahn, K.-B; Cho, S.; Ryu, J.H.
KIOST Author(s)
Cho, Seong Ick(조성익)Ryu, Joo Hyung(유주형)
Publication Year
2013
Abstract
The modulation transfer function (MTF) is a widely used indicator in assessments of remote-sensing image quality. This MTF method is also used to restore information to a standard value to compensate for image degradation caused by atmospheric or satellite jitter effects. In this study, we evaluated MTF values as an image quality indicator for the Geostationary Ocean Color Imager (GOCI). GOCI was launched in 2010 to monitor the ocean and coastal areas of the Korean peninsula. We evaluated in-orbit MTF value based on the GOCI image having a 500-m spatial resolution in the first time. The pulse method was selected to estimate a point spread function (PSF) with an optimal natural target such as a Seamangeum Seawall. Finally, image restoration was performed with a Wiener filter (WF) to calculate the PSF value required for the optimal regularization parameter. After application of the WF to the target image, MTF value is improved 35.06%, and the compensated image shows more sharpness comparing with the original image. © The Korean Space Science Society.
ISSN
2093-5587
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3304
DOI
10.5140/JASS.2013.30.4.321
Bibliographic Citation
Journal of Astronomy and Space Sciences, v.30, no.4, pp.321 - 326, 2013
Publisher
Korean Space Science Society
Keywords
Geostationary ocean color imager (GOCI); Modulation transfer function; MTF compensation; Wiener filter
Type
Article
Language
English
Document Type
Article
Publisher
Korean Space Science Society
Related Researcher
Research Interests

Coastal Remote Sensing,RS based Marine Surveillance System,GOCI Series Operation,연안 원격탐사,원격탐사기반 해양감시,천리안해양관측위성 운영

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