Proceedings of the KSRS Conference (대한원격탐사학회:학술대회논문집)
- 2005.10a
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- Pages.130-133
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- 2005
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- 1226-9743(pISSN)
THE EFFICIENT METHOD TO DETECT DEFECTIVE DETECTOR OF THE SWIR BAND OF SPOT 4
- Jung Hyung-sup (Department of Earth System Sciences, Yonsei University) ;
- Kang Myung-Ho (Agency for Defence Development 35 Yusung) ;
- Lee Yong-Woong (Agency for Defence Development 35 Yusung) ;
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Won Joong-Sun
(Department of Earth System Sciences, Yonsei University)
- Published : 2005.10.01
Abstract
This paper presents the efficient method to detect the defective detectors of the SWIR band of SPOT 4. The key of this method are to flatten the baseline of the data using high pass band filter instead of differentiation. This method is made up six steps. First step is to apply image enhancement techniques to enhance the lines imaged by defective detector and improve the quality of an image. Second step is processed by summing the enhanced image in line direction. These summed data have the peaks that represent the defective detectors and the curved baseline characterized by the reflectivity of Earth surface. In order to exactly detect these peaks, third step is to flatten the curved baseline using high pass filtering in the frequency domain. In fourth step, the data with flat baseline is normalized to have zero mean and unity standard deviation. In fifth step, the defective detectors are detected using