BUG: Kenichiro Yoshimi contributed fix to AnisotropicHybridDiffusion
Merge pull request #164 from aylward/HybridDiffusionContrastEnhancement

BUG: Kenichiro Yoshimi contributed fix to AnisotropicHybridDiffusion
ENH: Updated test baselines
Merge pull request #165 from aylward/HybridDiffusionContrastEnhancement

ENH: Updated test baselines