IEEE Trans Image Process - Contrast-enhanced fusion of multi-sensor images using subband-decomposed multiscale retinex.

Tópicos

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Resumo

In this paper, we propose a novel pixel-level multi-sensor image fusion algorithm with simultaneous contrast enhancement. In order to accomplish both image fusion and contrast enhancement simultaneously, we suggest a modified framework of the subband-decomposed multiscale retinex (SDMSR), our previous contrast enhancement algorithm. This framework is based on a fusion strategy that reflects the multiscale characteristics of the SDMSR well. We first apply two complementary intensity transfer functions to source images in order to effectively utilize hidden information in both shadows and highlights in the fusion process. We then decompose retinex outputs into nearly nonoverlapping spectral subbands. The decomposed retinex outputs are then fused subband-by-subband, by using global weighting as well as local weighting to overcome the limitations of the pixel-based fusion approach. After the fusion process, we apply a space-varying subband gain to each fused subband-decomposed retinex output according to the subband characteristic so that the contrast of the fused image can be effectively enhanced. In addition, in order to effectively manage artifacts and noise, we make the degree of enhancement of fused details adjustable by improving a detail adjustment function. From experiments with various multi-sensor image pairs, the results clearly demonstrate that even if source images have poor contrast, the proposed algorithm makes it possible to generate a fused image with highly enhanced contrast while preserving visually salient information contained in the source images.

Resumo Limpo

paper propos novel pixellevel multisensor imag fusion algorithm simultan contrast enhanc order accomplish imag fusion contrast enhanc simultan suggest modifi framework subbanddecompos multiscal retinex sdmsr previous contrast enhanc algorithm framework base fusion strategi reflect multiscal characterist sdmsr well first appli two complementari intens transfer function sourc imag order effect util hidden inform shadow highlight fusion process decompos retinex output near nonoverlap spectral subband decompos retinex output fuse subbandbysubband use global weight well local weight overcom limit pixelbas fusion approach fusion process appli spacevari subband gain fuse subbanddecompos retinex output accord subband characterist contrast fuse imag can effect enhanc addit order effect manag artifact nois make degre enhanc fuse detail adjust improv detail adjust function experi various multisensor imag pair result clear demonstr even sourc imag poor contrast propos algorithm make possibl generat fuse imag high enhanc contrast preserv visual salient inform contain sourc imag

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