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A DCT-Based Data-Hiding Method to Embed the Color Information in a JPEG Grey Level Image

Marc Chaumont 1 William Puech 1
1 ICAR - Image & Interaction
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : In this paper, we propose an original method to embed the color information of an image in a corresponding compressed grey-level image. The objective of this work is to allow free access to the compressed grey-level image and give color image access only if you own a secret key. This method is made of three major steps which are the color quantization, the ordering and the DCT-based data hiding. The novelty of this paper is to build an indexed image which is, in the same time, a semantically intelligible grey-level image. In order to obtain this particular indexed image, which should be robust to data hiding, we propose an original K color ordering algorithm. Finally, the DCT-based data-hiding method benefits from the used of an hybrid JPEG coder which allows to compress images with a Word Wide Web standard format and in the same time proposes a data-hiding functionality.
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Submitted on : Monday, January 22, 2007 - 2:13:14 PM
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  • HAL Id : lirmm-00125715, version 1

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Marc Chaumont, William Puech. A DCT-Based Data-Hiding Method to Embed the Color Information in a JPEG Grey Level Image. EUSIPCO: European Signal Processing Conference, Nov 2006, Pise, Italy. ⟨lirmm-00125715⟩

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