Reduction of Spectral Distortion in PAN-sharpening Using Spectral Adjustment and Anisotropic Diffusion

• Journal title : Korean Journal of Remote Sensing
• Volume 31, Issue 6,  2015, pp.571-582
• Publisher : The Korean Society of Remote Sensing
• DOI : 10.7780/kjrs.2015.31.6.7
Title & Authors
Reduction of Spectral Distortion in PAN-sharpening Using Spectral Adjustment and Anisotropic Diffusion
Lee, Sanghoon;

Abstract
This paper proposes a scheme to reduce spectral distortion in PAN-sharpening which produces a MultiSpectral image (MS) with the higher resolution of PANchromatic image (PAN). The spectral distortion results from reconstructing spatial details of PAN image in the MS image. The proposed method employs Spectral Adjustment and Anisotropic Diffusion to make a reduction of the distortion. The spectral adjustment makes the PAN-sharpened image agree with the original MS image, but causes block distortion because the spectral response of a pixel in the lower resolution is assumed to be equal to the average response of the pixels belonging to the corresponding area in the higher resolution at a same wavelength. The block distortion is corrected by the anisotropic diffusion which uses a conduct coefficient estimating from a local computation of PAN image. It results in yielding a PAN-sharpened image with the spatial structure of PAN image. GSA is one of PAN-sharpening techniques which are efficient in computation as well as good in quantitative quality evaluation. This study suggests the GSA as a preliminary PAN-sharpening method. Two data sets were used in the experiment to evaluate the proposed scheme. One is a Dubaisat-2 image of $\small{1024{\times}1024}$ observed at Los Angeles area, USA on February, 2014, the other is an IKONOS of $\small{2048{\times}2048}$ observed at Anyang, Korea on March, 2002. The experimental results show that the proposed scheme yields the PAN-sharpened images which have much less spectral distortion and better quantitative quality evaluation.
Keywords
Language
Korean
Cited by
1.
KOMPSAT-2/3/3A호의 영상융합에 대한 품질평가 프로토콜의 비교분석,정남기;정형섭;오관영;박숭환;이승찬;

대한원격탐사학회지, 2016. vol.32. 5, pp.453-469
1.
Comparison Analysis of Quality Assessment Protocols for Image Fusion of KOMPSAT-2/3/3A, Korean Journal of Remote Sensing, 2016, 32, 5, 453
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