Since P M diffusion

Shock filter

coherence enhancing diffusion and their fusing models in existence can not enhance road surface images well

a new model fused by the 3 basic PDE models is proposed. First the relationship between the diffusion strength of coherence enhancing diffusion and the degree of consistency of local directional structure is analyzed

and on the assumption that images are without noise

3 weight functions depending on the local gradients and the degree of consistency of local directional structure are designed

and the 3 basic PDE models are fused together by the 3 weight functions. Then according to the characteristics of road