一种改进的双边滤波图像去噪算法.pdf

Computer Engineering and Applications 1 * 1,2 3 1 , , , 1 1,2 3 1 SI Shao-hui , HU Fu-yuan , ZHANG Wei , Wu Hong-jie 1. , 215011 2., 215011 3., 100000 1. College of electronic and information engineering, Suzhou University of Science and technology, Suzhou 215011, China 2. Modern enterprise information application support software engineering technology RD center of Jiangsu Province, Suzhou 215011, China 3. China highway engineering consulting group Co., Ltd., Beijing, 100000, China SI Shao-hui, HU Fu-yuan, ZHANG Wei, WU Hong-jie. Improved bilateral filtering algorithm. Computer Engineering and Applications Abstract Similar weight of bilateral filtering is only controlled by σ, so the texture detail in smooth area or r 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 σ r v doi 10