Abstract
The advanced multi scale Retinex (AMSR) algorithm was put forward: after enhanced by multi scale Retinex the image of the truncate interval that it was a range near the mean brightness μ in k multiple standard deviation σ had been elected and stretched. According to the ideas of D. J. Jobson et al. if the production of the brightness multiply with the contrast degree for the stretched image was in the range of [6 000, 10 000], the stretched image has high quality. As the same time, the experiments proved the conclusion: the highest quality image in enhanced images for an underexposure color image was that it selected about k =1 multiple standard deviation range near the mean brightness and stretched after enhanced by multi scale Retinex algorithm.
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