Securing color information of an image by concealing the color palette

  • Authors:
  • M. Chaumont;W. Puech;C. Lahanier

  • Affiliations:
  • Universite de Nimes, F-30021 Nímes, France and Universite Montpellier 2, UMR5506-LIRMM, F-34095 Montpellier, France and CNRS, UMR5506-LIRMM, F-34392 Montpellier, France;Universite Montpellier 2, UMR5506-LIRMM, F-34095 Montpellier, France and CNRS, UMR5506-LIRMM, F-34392 Montpellier, France;C2RMF, UMR 171 CNRS Culture Ministry, Paris, France

  • Venue:
  • Journal of Systems and Software
  • Year:
  • 2013

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Abstract

This paper deals with a method to protect the color information of images by providing free access to the corresponding gray level images. Only with a secret key and the gray level images, it is then possible to view the images in color. The approach is based on a color reordering algorithm after a quantization step. Based on a layer scanning algorithm, the color reordering generates gray level images and makes it possible to embed the color palette into the gray level images using a data hiding algorithm. This work was carried out in the framework of a project aimed at providing limited access to the private digital painting database of the Louvre Museum in Paris, France.