In microscopy, Gaussian noise arises from many sources including electronic components such as detectors and sensors. In addition, salt & pepper noise may also show up due to errors in analog to digital conversion. Therefore, image denoising is one of the primary pre-processing operations that a researcher performs before proceeding with extracting information out of these images.
This tutorial explains block matching and 3D filtering (BM3D). The implementation is based on the recent (2019) publication by Ymir Mäkinen et. al.: http://www.cs.tut.fi/~foi/papers/ICIP...
References:
http://www.cs.tut.fi/~foi/papers/ICIP...
Code associated with these tutorials can be downloaded from here: https://github.com/bnsreenu/python_fo...