CAJ | 학술논문

IHS（intensity-hue-saturation）变换是影像融合实际生产中使用最多的一种方法，而小波变换是近几年来影像融合中的热门研究方向。但是现有方法存在纹理畸变和光谱畸变的现象，尤其是当地物光谱特性在全色和多光谱中存在较大差异的时候，融合后光谱畸变将会十分突出。为了解决上述问题，在分析现有小波变换方法的基础上提出了一种基于加权小波变换及调制传递函数补偿（MTFC）的多光谱影像融合方法，通过引入多相位小波变换的方式来抑制小波变换产生的纹理畸变，同时通过引入MTFC的方法来恢复影像融合中丢失的纹理信息。文章选用“高分二号”卫星影像来验证算法的有效性，试验结果表明，与现有的融合方法相比，文章中提出的算法能够很好地抑制影像中的光谱畸变，同时保留更多的有效纹理信息。
IHS（intensity-hue-saturation）변환시영상융합실제생산중사용최다적일충방법，이소파변환시근궤년래영상융합중적열문연구방향。단시현유방법존재문리기변화광보기변적현상，우기시당지물광보특성재전색화다광보중존재교대차이적시후，융합후광보기변장회십분돌출。위료해결상술문제，재분석현유소파변환방법적기출상제출료일충기우가권소파변환급조제전체함수보상（MTFC）적다광보영상융합방법，통과인입다상위소파변환적방식래억제소파변환산생적문리기변，동시통과인입MTFC적방법래회복영상융합중주실적문리신식。문장선용“고분이호”위성영상래험증산법적유효성，시험결과표명，여현유적융합방법상비，문장중제출적산법능구흔호지억제영상중적광보기변，동시보류경다적유효문리신식。
AbstractImage fusion is an important tool to fuse high spectral and high spatial information into one image for image interpretation and target recognition in remote sensing application. To date, many image fusion methods have been developed, among which IHS technique is the most widely used, and the wavelet fusion is the most frequently discussed in recent publications due to its obvious advantages. However, the available methods can hardly produce a satisfactory fusion result, in which spectral and spatial distortions often take place, especially when spectral properties of the same surface features are different between natural color images and panchromatic ones. To solve the problem, we propose a new method by introducing a multi-phase approach to restrain spatial distortion caused by the shift variant attribution of wavelet transformation. With suitable rules of fusion, the method uses modulation transfer function compensation (MTFC) to restore details, so that the spectral distortion can be avoided. The performance of the method was evaluated with standard images from GF-2 satellite. It was proven that the method could improve the fusion quality significantly in comparison with conventional fusion methods.