Visibility in Bad Weather from a Single Image

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# Visibility in Bad Weather from a Single Image - PowerPoint PPT Presentation

Visibility in Bad Weather from a Single Image. Robby T. Tan Imperial College London CVPR. 2008. Outline. Introduce Model Algorithm Result Future work and conclusion. x is the 2D spatial location. L∞ is the atmospheric light. ρ is the reflectance of an object in the image .

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### Visibility in Bad Weather from a Single Image

Robby T. Tan

Imperial College London

CVPR. 2008

Outline
• Introduce
• Model
• Algorithm
• Result
• Future work and conclusion

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.

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

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

• Color vectors：
AirlightSmoothness Constraint
• Data term
• Smooth term