Proceedings of the KSRS Conference (대한원격탐사학회:학술대회논문집)
- Volume 1
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- Pages.25-28
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- 2006
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- 1226-9743(pISSN)
A NEW METHOD OF MASKING CLOUD-AFFECTED PIXELS IN OCEAN COLOR IMAGERY BASED ON SPECTRAL SHAPE OF WATER REFLECTANCE
- Fukushima, Hajime (School of High Technology for Human Welfare, Tokai University) ;
- Tamura, Jin (School of High Technology for Human Welfare, Tokai University) ;
- Toratani, Mitsuhiro (School of High Technology for Human Welfare, Tokai University) ;
- Murakami, Hiroshi (Japan Aerospace Exploration Agency)
- Published : 2006.11.02
Abstract
We propose a new method of masking cloud-affected pixels in satellite ocean color imageries such as of GLI. Those pixels, mostly found around cloud pixels or in scattered cloud area, have anomalous features in either in chlorophyll-a estimate or in water reflectance. This artifact is most likely caused by residual error of inter-band registration correction. Our method is to check the pixel-wise 'soundness' of the spectral water reflectance Rw retrieved after the atmospheric correction. First, we define two spectral ratio between water reflectance, IRR1 and IRR2, each defined as RW(B1)/RW (B3) RW (B3) and as RW (B2)/RW(B4) respectively, where