[IPOL announce] new article: Implementation of VBM3D and Some Variants

[announcements about the IPOL journal]

A new article is available in IPOL: https://www.ipol.im/pub/art/2021/340/

Thibaud Ehret, and Pablo Arias,
Implementation of VBM3D and Some Variants,
Image Processing On Line, 11 (2021), pp. 374–395.
https://doi.org/10.5201/ipol.2021.340

Abstract
VBM3D is an extension to video of the well-known image denoising 
algorithm BM3D, which takes advantage of the sparse representation of 
stacks of similar patches in a transform domain. The extension is rather 
straightforward: the similar 2D patches are taken from a spatio-temporal 
neighborhood which includes neighboring frames. In spite of its 
simplicity, the algorithm offers a good trade-off between denoising 
performance and computational complexity. In this work we revisit this 
method, providing an open-source C++ implementation reproducing the 
results. A detailed description is given and the choice of parameters is 
thoroughly discussed. Furthermore, we study and compare several 
extensions of the original algorithm: (1) a multiscale implementation, 
(2) the use of 3D patches, (3) the use of optical flow to guide the 
patch search. These extensions yield results which are competitive with 
the most recent state of the art.