TITLE:
Image Dehazing with Hybrid λ2-λ0 Penalty Mode
AUTHORS:
Yuxuan Zhou, Dongjiang Ji, Chunyu Xu
KEYWORDS:
Atmospheric Scattering Model, Guided Filter with 2 Norm, 0 Gradient Minimization, Single Image Dehazing, Transmission Map, Ridge Regression
JOURNAL NAME:
Journal of Computer and Communications,
Vol.12 No.10,
October
25,
2024
ABSTRACT: Due to the presence of turbid media, such as microdust and water vapor in the environment, outdoor pictures taken under hazy weather circumstances are typically degraded. To enhance the quality of such images, this work proposes a new hybrid λ2-λ0 penalty model for image dehazing. This model performs a weighted fusion of two distinct transmission maps, generated by imposing λ2 and λ0 norm penalties on the approximate regression coefficients of the transmission map. This approach effectively balances the sparsity and smoothness associated with the λ0 and λ2 norms, thereby optimizing the transmittance map. Specifically, when the λ2 norm is penalized in the model, an updated guided image is obtained after implementing λ0 penalty. The resulting optimization problem is effectively solved using the least square method and the alternating direction algorithm. The dehazing framework combines the advantages of λ2 and λ0 norms, enhancing sparse and smoothness, resulting in higher quality images with clearer details and preserved edges.