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Transferring color to single band intensified nightvision images

Author: Toet, A.
Type:article
Date:2004
Source:Verly, J.G., Enhanced and Synthetic Vision 2004, 12 April 2004 through 13 April 2004, Orlando, FL, 40-49
series:
Proceedings of SPIE - The International Society for Optical Engineering
Identifier: 13201
doi: doi:10.1117/12.546948
Keywords: Vision · Colour · False colour · Night vision · Intensified imagery · Colour vision · Color transfer · False color · Intensified imagery · Nightvision · Algorithms · Computer graphics · Information analysis · Signal processing · Statistical methods · Color image processing

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 determined 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.