Alexey V. Pasechnik

I1 = Import["C:\\Users\\Alexey Pasechnik\\Documents\\Maxima\\Ticho.jpg"]

ImageDeconvolve[I1, GaussianMatrix[7],
    Method -> {"Hybrid", "Preconditioned" -> False},
    MaxIterations -> 100]

ImageDeconvolve[I1, GaussianMatrix[#],
    Method -> {"Hybrid", "Preconditioned" -> False},
    MaxIterations -> 100] & /@ {1, 2, 3, 4, 5, 6, 7, 8, 9}

ImageDeconvolve[I1, GaussianMatrix[5],
    Method -> {#, "Preconditioned" -> False},
    MaxIterations -> 100] & /@ {"Hybrid", "SteepestDescent","RichardsonLucy"}

ImageDeconvolve[I1, GaussianMatrix[2], 
   Method -> {#, "Preconditioned" -> True}] & /@ {"Hybrid", 
  "SteepestDescent", "RichardsonLucy"}