Digital watermarking of JPEG images by a holographic technique

Nobukatsu Takai

doi:10.1117/12.523972

19 November 2003 Digital watermarking of JPEG images by a holographic technique

Nobukatsu Takai

Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.523972
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

Abstract

A holographic technique is applied for digital watermarking by a computer. In the study, the digital watermark is hidden in JPEG images in a form of diffuse-type holograms by applying the concept of optical holography. The conditions required for the reconstruction of the digital watermark from such images are investigated experimentally in comparison with those of bitmap images. The quality of reconstructed images is evaluated by the peak values of cross-correlation between the reconstructed watermark image and the original one.

Citation Download Citation

Nobukatsu Takai "Digital watermarking of JPEG images by a holographic technique", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.523972

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