semi2M\cameraman.tif ......\fgradient.p ......\fv.m ......\iteration.m ......\mainG.m ......\mainU.asv ......\mainU.m ......\noise_semi2m_ULa18.mat ......\p1.mat ......\phigradient.m ......\phiv.m ......\psiv.m semi2M