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Colorizing single band intensified nightvision images

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Author: Toet, A.
Type:article
Date:2005
Institution: TNO Defensie en Veiligheid
Source:Displays, 26, 15-21
Identifier: 13459
doi: doi:10.1016/j.displa.2004.09.007
Keywords: Vision · Intensified imagery · Colour · false colour · Colour vision · Color transfer · False color · Intensified imagery · Nightvision · Cameras · Color image processing · Global positioning system · Image segmentation · Image sensors · Light · Mathematical transformations · Matrix algebra · Object recognition · Pattern matching · Statistical methods · Color transfer · False color · Intensified imagery · Nightvision · Color vision

Abstract

We present a method to give single band intensified nightvision imagery a natural day-time color appearance. For input, the method requires a true color RGB source image and a grayscale nightvision target image. The source and target image are both transformed into a perceptually decorrelated color space. In this color space a best matching source pixel is deter mined for each pixel of the target image. The matching criterion uses the first order statistics of the luminance distribution in a small window around the source and target pixels. Once a best matching source pixel is found, its chromaticity values are assigned (transferred) to the target pixel while the original luminance value of the target pixel is retained. The only requirement of the method is that the compositions of the source and target scenes resemble each other.