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Shengdong Pan

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SPIE Journal Paper | 1 April 2013 Open Access

Adapting iterative retinex computation for high-dynamic-range tone mapping

Shengdong Pan, Xiangjing An, Hangen He

JEI, Vol. 22, Issue 02, 023006, (April 2013) https://doi.org/10.1117/12.10.1117/1.JEI.22.2.023006

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Retinex algorithms have been widely applied in many aspects of image processing. Based on the iterative Retinex algorithm, we propose an edge-preserving illumination estimation method. Inspired by the anisotropic diffusion, an edge-stopping function is introduced in the iterative computation. This modification enables the preservation of abrupt edges when computing the upper envelope of a given image. Based on the illumination-reflectance decomposition, a high-dynamic-range (HDR) radiance map can be easily tone-mapped to be a low-dynamic-range image by compressing the range of the estimated illumination. Artifacts are effectively suppressed using the proposed method. Meanwhile, we also propose a jumping-spiral iteration manner to improve the symmetry of the edge response. Experimental results show that the proposed tone mapping algorithm is very effective in reproducing HDR scenes, and has a better performance compared with some similar operators.

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