Abstract
Images captured under uneven lighting conditions often suffer from low visual quality in dark areas. It is hard to make a good balance between improving detail visibility and suppressing over-enhancement. To cope with this, we propose a method to enhance local contrast in dark regions. Inspired by reinterpreting the Weber contrast, we treat an image as a product of two transfer functions, a luminance mapping and a contrast measure functions, and enhance an image by tuning these two functions based on the characteristics of the human visual system. The two merits of the proposed method include: (1) luminance mapping function is derived from the sensitivity of photoreceptors in retina; (2) contrast measure function is based on a neural model of the retinal receptive fields. Experiments and comparison show the proposed method outperforms the state-of-art.
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The first author is supported in part by China Scholarship Council.
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Pu, T., Wang, S., Wang, P. (2018). A Perceptually Inspired Method for Enhancing Contrast in Uneven Lighting Images. In: Gruca, A., CzachĂłrski, T., Harezlak, K., Kozielski, S., Piotrowska, A. (eds) Man-Machine Interactions 5. ICMMI 2017. Advances in Intelligent Systems and Computing, vol 659. Springer, Cham. https://doi.org/10.1007/978-3-319-67792-7_2
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DOI: https://doi.org/10.1007/978-3-319-67792-7_2
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