A color image vector median filtering algorithm based on noise estimation and double weighted spatial distance and magnitude value
Yin Fu-liang · Journal of Optoelectronics·laser · 2011
In order to protect color and details while filtering the impulsive noises in color image,a new filtering algorithm is proposed based on noise estimation and double weighted spatial distance and magnitude value.A two-level estimation scheme is adopted for noise estimation,where the first level estimation is based on maximum and minimum pixel gray levels,and the second level uses the weighted directional operator.For noise restoration,the non-noisy pixels remain unchanged;the noisy pixels are restored by the double weighted vector median filtering algorithm.Experimental results show that the proposed algorithm can filter the noises effectively and protecting the image color and the details well for low to medium density impulsive noises in color image.