Method for enhancing granularity-controllable low-illuminance image

The invention provides a method for enhancing a granularity-controllable low-illuminance image. The method includes the steps that firstly, an light radiation field of an original low-illuminance image is obtained, then through estimation of the brightness of the original low-illuminance image, an a...

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Bibliographic Details
Main Authors DAI SHENGKUI, SUN WANYUAN, GAO JIANPING
Format Patent
LanguageChinese
English
Published 17.09.2014
Subjects
CALCULATING
COMPUTING
COUNTING
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
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Summary:The invention provides a method for enhancing a granularity-controllable low-illuminance image. The method includes the steps that firstly, an light radiation field of an original low-illuminance image is obtained, then through estimation of the brightness of the original low-illuminance image, an adaptive brightness repair factor omega and basic light intensity A are prepared, and by the utilization of the standard deviation of the light radiation field, two adaptive Gaussian filters are prepared; finally, noise removal and fuzzification are conducted on the light radiation field through the two Gaussian filters and a recovered image is obtained through the adaptive brightness repair factor omega and the basic light intensity A. Due to the fact that an airglow scattering model reflecting the visible light imaging low is adopted, the image recovery effect can meet the human vision characteristic; the Gaussian filters are designed adaptively and the brightness repair factor and the basic light intensity are ca
Bibliography:Application Number: CN20141246543