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Satellite Image Pansharpening Using a Hybrid Approach for Object-Based Image Analysis

Center for Environmental Remote Sensing (CEReS), Chiba University, 1-33 Yayo-icho, Inage, Chiba 263-8522, Japan
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ISPRS Int. J. Geo-Inf. 2012, 1(3), 228-241; https://doi.org/10.3390/ijgi1030228
Received: 3 August 2012 / Revised: 25 September 2012 / Accepted: 9 October 2012 / Published: 16 October 2012
Intensity-Hue-Saturation (IHS), Brovey Transform (BT), and Smoothing-Filter-Based-Intensity Modulation (SFIM) algorithms were used to pansharpen GeoEye-1 imagery. The pansharpened images were then segmented in Berkeley Image Seg using a wide range of segmentation parameters, and the spatial and spectral accuracy of image segments was measured. We found that pansharpening algorithms that preserve more of the spatial information of the higher resolution panchromatic image band (i.e., IHS and BT) led to more spatially-accurate segmentations, while pansharpening algorithms that minimize the distortion of spectral information of the lower resolution multispectral image bands (i.e., SFIM) led to more spectrally-accurate image segments. Based on these findings, we developed a new IHS-SFIM combination approach, specifically for object-based image analysis (OBIA), which combined the better spatial information of IHS and the more accurate spectral information of SFIM to produce image segments with very high spatial and spectral accuracy. View Full-Text
Keywords: pansharpening; image segmentation; object-based image analysis; image segmentation evaluation; GEOBIA; OBIA; GeoEye-1; high resolution imagery pansharpening; image segmentation; object-based image analysis; image segmentation evaluation; GEOBIA; OBIA; GeoEye-1; high resolution imagery
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Johnson, B.A.; Tateishi, R.; Hoan, N.T. Satellite Image Pansharpening Using a Hybrid Approach for Object-Based Image Analysis. ISPRS Int. J. Geo-Inf. 2012, 1, 228-241.

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