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Optical Engineering

Hiding a picture in two pictures
Author(s): Ren-Junn Hwang; Chin-Chen Chang
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Paper Abstract

We present a simple and efficient method capable of hiding a picture in two pictures, which we refer to as the picture hiding scheme. The proposed scheme generates two new pictures given two different original pictures and a secret picture. These two different original pictures are arbitrary, and the secret picture presents confidential information. The meanings of three pictures are not related to each other. An image defined as the secret picture can be recognized through the human visual system only when one of these two new pictures superposes on another new picture directly. This superposing process can be accomplished with two slides, therefore, no computation is performed. Anyone who obtains only one of these two new pictures cannot generate any knowledge of the secret picture. This picture hiding scheme can be used to construct a human identification scheme, which is particularly appropriate when delicate computer devices or instruments for identification are expensive. It also can apply to resolve the watermarking problem.

Paper Details

Date Published: 1 March 2001
PDF: 10 pages
Opt. Eng. 40(3) doi: 10.1117/1.1346585
Published in: Optical Engineering Volume 40, Issue 3
Show Author Affiliations
Ren-Junn Hwang, Tamkang Univ. (Taiwan)
Chin-Chen Chang, National Chung Cheng Univ. (Taiwan)


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