Abstract
According to the characteristics of the night-vision image, a brightness adjustment method for the night-vision image is developed by the modified Retinex algorithm based on the S curve. Firstly, the color RGB night-vision image is transformed into an uncorrelated color space--- the YUV space. Then the luminance component is enhanced by the modified Retinex algorithm with the S curve. According to experimental results, it could retain the essential sunlight and shade information and make the image fit for the visual observation.
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