Adaptive Enhancement and Noise Reduction in Very Low Light Level Video
H.Malm, M.Oskarsson,E.Warrant,P.Clarberg,J.Hasselgren, C.Lejdfors
11th International conference on Computer vision, ICCV,pg 1-8,,Oct 2007
This paper presents a method for noise reduction and contrast enhancement of a noisy video taken at very low light level. The noise is first removed by using Adaptive Spatio-Temporal intensity smoothing. After denoising the intensity is adjusted by contrast limited histogram equalization tone mapping method.This method spreads out the intensities more uniformly and widens the dynamic range of the darker areas.