**Noise2Fast** is a model for single image blind denoising. It is similar to masking based methods -- filling in the pixel gaps -- in that the network is blind to many of the input pixels during training. The method is inspired by Neighbor2Neighbor, where the neural network learns a mapping between adjacent pixels. Noise2Fast is tuned to speed by using a discrete four image training set obtained by a form of downsampling called “checkerboard downsampling.

Ensemble clustering, also called consensus clustering, has
been attracting much attention in recent years, aiming to combine multiple base clustering algorithms into a better and more consensus clustering. Due to its good performance, ensemble clustering plays a vital role in many research areas, such as community detection and bioinformatics.

Ensemble Clustering

Ensemble Learning for Spectral Clustering

Noise2Fast

Noise2Fast: Fast Self-Supervised Single Image Blind Denoising

A **Parametric Rectified Linear Unit**, or **PReLU**, is an activation function that generalizes the traditional rectified unit with a slope for negative values. Formally:

$$f\left(y\_{i}\right) = y\_{i} \text{ if } y\_{i} \ge 0$$
$$f\left(y\_{i}\right) = a\_{i}y\_{i} \text{ if } y\_{i} \leq 0$$

The intuition is that different layers may require different types of nonlinearity. Indeed the authors find in experiments with convolutional neural networks that PReLus for the initial layer have more positive slopes, i.e. closer to linear. Since the filters of the first layers are Gabor-like filters such as edge or texture detectors, this shows a circumstance where positive and negative responses of filters are respected. In contrast the authors find deeper layers have smaller coefficients, suggesting the model becomes more discriminative at later layers (while it wants to retain more information at earlier layers).

Source	Noise2Fast: Fast Self-Supervised Single Image Blind Denoising
Year	2000
Data Source	CC BY-SA - https://paperswithcode.com