Hand Depth Image Denoising and Superresolution via Noise-Aware Dictionaries

Figure 4

The difference between how OMP and NAOMP work on decompositions of residuals with nonzero-mean noise. Left: traditional OMP for zero-mean Gaussian noise. Middle: traditional OMP for nonzero-mean noise. Right: NAOMP for nonzero-mean noise. The -axis: the index of each component of the residual; the -axis: the value of each component of the residual. The residual in this figure is a vector of length sixteen. From top to bottom: a procedure for updating a residual and an atom.