图像引导滤波器 gi=pi-ni filtering input p filtering output g 极 gi al;b guide I [6]K.He,J.Sun,and X.Tang.Guided image filtering.In Proc.of ECCV,2010
图像引导滤波器 [6] K. He, J. Sun, and X. Tang. Guided image filtering. In Proc. of ECCV, 2010
图像引导滤波器 9,=p,-n m∑al,+b-p,)P+am n;-noise texture Linear regression input p output q cov(I,p) a= var(I)+& q;al;+b b=p-al guide I
图像引导滤波器
图像引导滤波器 Definition Extend to the entire image In all local windows @,compute cov:(I,p) the linear coefficients ak三 varg (I)+& Compute the average of a,+b in all that covers pixel gi be Px-alk 9aa以+ 03 -aI;+b Window radius r Regularization s
图像引导滤波器
双边滤波器VS引导滤波器 Input Signal Base Layer Detail Layer wnim/w ow-vtw wynww/tNm/v wiNw wwwBM Enhanced Signal reversed gradients Bilateral Filter Guided Filter Fig.4.1-D illustration for detail enhancement.See the text for explanation
双边滤波器 vs 引导滤波器
6.频域图像处理 Frequency domain filtering operation Filter Fourier Inverse function transform Fourier H(u,) transform F(u,v) H(u,v)F(u,v) Pre- Post- processing processing f(x,y)园 g(x,y) Input Enhanced image image
6.频域图像处理