融合梯度信息的改进中值滤波算法研究

Research on improved median filtering algorithm fused with gradient information

针对中值滤波在去除噪声时会破坏图像细线特征、边缘模糊的问题,根据待处理图像边缘特征选择合适形状和大小的滤波窗口,对图像进行滤波处理。提出一种融合边缘梯度信息的改进中值滤波算法,算法可以根据边缘梯度信息自适应调节滤波窗口的形状和大小,最大程度上减少边缘模糊,保护细线特征。将算法应用于含有印痕缺陷的弹壳底部图像滤波处理。滤波前后的图像对比有效证明了所提出的算法能够很好地保护缺陷特征。

Aiming at the problem that median filtering will destroy image thin line features and edge blur-ring when denoising,filtering window of the appropriate shape and size is selected ac-cording to the edge features of the image to be processed,and the image is filtered.An im-proved median filtering algorithm which fuses edge gradient information is proposed.The algorithm can adaptively adjust the shape and size of the filtering window according to the edge gradient infor-mation to minimize edge blur and protect fine line features.The algorithm is applied to the bot-tom image of the shell with imprinting defect.The comparison of the images before and after filtering effectively proves that the proposed algorithm can well protect the defect features.