关键词: 双边滤波器, 自适应, 分数阶微分, 纹理细节增强

Abstract: Similar weight of bilateral filtering is only controlled by [σr], so the texture detail in smooth area or complex environment cannot be reserved well. Therefore, a developed bilateral filtering algorithm with adaptive fractional order differentiation is proposed. The amplitude-frequency nonlinear model is established through analyzing texture characters and computing frequency gradients/amplitude change based on bilateral filter algorithm, which automatically chooses fractional order v to create mask operator using fractional order differentiation. Experimental results show that the proposed algorithm has better performance in noise filtering while maintaining/enhancing texture details robustly.

Key words: bilateral filtering, adaptive, fractional order differentiation, texture detail enhancement