Non-local means

Non-Local Means is an image processing technique used to reduce noise while preserving detail. Instead of just considering nearby pixels for smoothing an image, it looks at all pixels and their similarities across the entire image. If two pixels are similar in color or pattern, the algorithm uses their information to enhance clarity in each pixel. This approach helps keep important details intact, making it especially useful for enhancing photographs or medical images, where maintaining fine details is critical while reducing unwanted noise.