BM3D is a recent denoising method based on the fact that an image has a locally sparse representation in transform domain. The following source code presents a detailed implementation of BM3D Image Denoising Method.
Piecewise Linear Estimation is a very important denoising algorithm.The following source code focus on its implementation and show its performance by comparing it with several other acclaimed algorithms.
Lens distortion is estimated by the division model using one parameter, which allows to state the problem into the Hough transform scheme by adding a distortion parameter to better extract straight lines from the image. The following source code is about Automatic Lens Distortion Correction Using One-Parameter Division Models.