Non-local means
Non-local means filter is an algorithm in image processing for image denoising. Unlike other local smoothing filters, non-local means filter averages all observed pixels to recover a single pixel. The weight of each pixel depends on the distance between its intensity grey level vector and that of the target pixel. Non-local means algorithm was published by Antoni Buades,et al. in 2005.
In 2009,Matan Protter and Michael Elad used this method on super resolution and this method is very successful in providing super-resolution on general sequences.
I found when there was illumination change between frames. NLM can't find enough similar patch and its result was degraded significantly. So I am working on this .problem this summer
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