A method for detecting change in coral reef using pan-sharpened satellite images

Hiroshi Hanaizumi; Mizue Akiba; Hiroya Yamano; Tsuneo Matsunaga

doi:10.1117/12.806398

11 December 2008 A method for detecting change in coral reef using pan-sharpened satellite images

Hiroshi Hanaizumi, Mizue Akiba, Hiroya Yamano, Tsuneo Matsunaga

Proceedings Volume 7149, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications II; 71490T (2008) https://doi.org/10.1117/12.806398
Event: SPIE Asia-Pacific Remote Sensing, 2008, Noumea, New Caledonia

Abstract

A method was developed for global monitoring of temporal change of coral reef using pan-sharpened color images with higher accuracy and lower cost. The method consisted of 3 blocks; image co-registration for removing complex discrepancy due to parallax among original color image and panchromatic one, pan-sharpening with preserving color information, and change detection with suppressing noise such as sea waves. The method was successfully applied to an actual FORMOSAT2 multi-temporal data set. After removing the parallax between multi-spectral band images and panchromatic one, the spatial resolution of multi-spectral images was improved from 8 x 8 m² to 2 x 2 m² in the following pan-sharpening block. The pan-sharpening was performed by replacing brightness component of the original multi-spectral pixel with the panchromatic pixel density. In order to normalize the recording gain and offset, the brightness component was estimated by using a linear polynomial model whose coefficients were determined by applying a multiple regression analysis. Linear shapes of density scatter diagram of each spectral band between pansharpened density and original one indicated that the pan-sharpened spectral information was perfectly preserved. The change detection successfully detected some temporal changes with suppressing noise. The method was applicable to other data sets having lower resolution multi-spectral images and panchromatic one covering all spectral bands.

Citation Download Citation

Hiroshi Hanaizumi, Mizue Akiba, Hiroya Yamano, and Tsuneo Matsunaga "A method for detecting change in coral reef using pan-sharpened satellite images", Proc. SPIE 7149, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications II, 71490T (11 December 2008); https://doi.org/10.1117/12.806398

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KEYWORDS

Near infrared

Spatial resolution

Canonical correlation analysis

Earth observing sensors

Image resolution

Satellite imaging

Satellites

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