Visibility Detection Algorithm of Single Fog Image Based on the Ratio of Wavelength Residual Energy

Different visibilities and different wavelength attenuations can cause color deviation problem in some dehazing algorithms. A visibility detection algorithm based on a single fog image is proposed. First, the visibility range of the image is preliminarily determined according to the transmissivity; then, the normalized differences between the residual energy ratios of different wavelengths of RGB channels are calculated, and the pixels with large gray deviation of a single channel are filtered to improve the calculation accuracy; finally, the image visibility detection value is calculated. The experimental results show that the proposed algorithm not only effectively reflects the fog image visibility but is also well suited for evaluating the effectiveness of the image defogging algorithms and the restoration degree of the defogging color difference.

Automated summary

The algorithm proposes a visibility detection method based on a single fog image, determining visibility range and calculating normalized differences between residual energy ratios of different wavelengths to improve accuracy. It effectively reflects fog image visibility and is suitable for evaluating the effectiveness of defogging algorithms and color restoration degree.