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基于旋转不变像素相关性的加权中值滤波器

DOI: 10.11834/jig.20100110

Keywords: 加权中值滤波,旋转不变性,灰度图像除噪,彩色图像除噪,差分进化

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Abstract:

作为一种典型的非线性滤波器,加权中值滤波器可以通过权值系数调整图像的滤波性能。但是在传统加权中值滤波器中,模板内各个像素都对应唯一的权值系数,没有考虑到滤波模板下像素之间的相关性。因此,将权值与模板下两两像素间相关性对应,提出一种新的加权中值滤波模型。同时考虑到图像旋转、翻转情况下滤波的稳定性,进行对称性设计,降低权值模型复杂度,采用差分进化算法对权值进行寻优。对不同滤波器进行权值寻优实验可以看出,基于旋转不变像素相关性的权值模型具有更好的收敛性;灰度图像和彩色图像脉冲噪声的滤波实验结果表明,其在抑制图像

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