Algorithm 2.
Modified Guided Filter(xI, xG, w, ∊, α, β), go(.) represents performing operation ‘o’ on the arguments
| Input: xI − Input Image to be filtered (xLTO or xTV) |
| xGI − Guidance Image (xLBP) |
| w − Radius of the Window (patch size) |
| ∊, α, β − Regularization Parameters |
| Output xF − Output Image |
| meanxGI = gmean(xGI); meanxI = gmean(xI) |
| corrxGI = gmean(xGI. * xGI); corrxGI−I = gmean(xGI. * xI) |
| varxGI = corrxGI − meanxGI. * meanxGI; covxGI−I = corrxGI−I − meanxGI. * meanxI |
| a = (covxGI−I./(varxGI + ∊))α; b = meanxI − β * a. * meanxGI |
| meanb = gmean(b); meana = gmean(a) |
| xF = meana. * xGI + meanb |