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Visibility in Bad Weather from a Single Image Robby T. Tan Imperial College London CVPR. 2008

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Outline Introduce Model Algorithm Result Future work and conclusion

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x is the 2D spatial location. L is the atmospheric light. ρ is the reflectance of an object in the image. β is the atmospheric attenuation coefficient. d is the distance between an object in the image and the observer.

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Define image chromaticity Assume distant (d = ), since e^-βd = 0, light chromaticity Assume no effect of scattering particles e^-βd = 1, object chromaticity

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By utilizing the light chromaticity (α) we can transform the color of the atmospheric light of the input image into white color Color vectors

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Maximizing contrast

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Airlight Smoothness Constraint Data term Smooth term

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Algorithm

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Future work and conclusion

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