Hand Depth Image Denoising and Superresolution via Noise-Aware Dictionaries

Figure 6

Denoising Gaussian noise from hand depth images captured by Kinect sensor v2. Columns 1–3 are three examples of hand depth images. Row 1 left: noisy depth images of resolutions . Row 1 right: denoised images using bilateral filters [6]. Row 2 left: denoised images using OMP-based K-SVD [19]. Row 2 right: denoised images using NAOMP-based K-SVD. Row 3 left: denoised images using bilateral filters (2)–(4) plus OMP-based K-SVD [19]. Row 3 right: denoised images using the proposed filters (2)–(4) plus NAOMP-based K-SVD. Row 4: amplified comparison details of images of row 3. Row 5: superresolution of denoised images of left subfigure of row three via OMP-based K-SVD. Row 6: superresolution of denoised images of right subfigure of row three via NAOMP-based K-SVD.