Quantization index modulation-based image watermarking using digital holography

We propose a blind watermarking method where the watermark is a hologram itself. In the proposed approach, the quantized phase of the hologram is embedded into the wavelet-transformed host image using quantization index modulation. In the detection stage, wavelet transform of the watermarked image f...

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Veröffentlicht in:	Journal of the Optical Society of America. A, Optics, image science, and vision Optics, image science, and vision, 2007, Vol.24 (1), p.243-252
Hauptverfasser:	OKMAN, O. Erman, AKAR, Gozde Bozdagi
Format:	Artikel
Sprache:	eng
Schlagworte:	Computer-generated holograms Computers in experimental physics Exact sciences and technology Fundamental areas of phenomenology (including applications) Holography Image forming and processing Image processing Imaging and optical processing Instruments, apparatus, components and techniques common to several branches of physics and astronomy Optics Physics
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container_title	Journal of the Optical Society of America. A, Optics, image science, and vision
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creator	OKMAN, O. Erman AKAR, Gozde Bozdagi
description	We propose a blind watermarking method where the watermark is a hologram itself. In the proposed approach, the quantized phase of the hologram is embedded into the wavelet-transformed host image using quantization index modulation. In the detection stage, wavelet transform of the watermarked image followed by a minimum distance decoder is used. The proposed method is blind since it requires only information about the quantizers and the parameters of the hologram recording process. The robustness of the proposed technique is tested against several attacks such as filtering, compression, occlusion, and cropping. Moreover, we discuss the effect of quantization of the hologram on the reconstruction quality.
doi_str_mv	10.1364/JOSAA.24.000243
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Erman</creatorcontrib><creatorcontrib>AKAR, Gozde Bozdagi</creatorcontrib><title>Quantization index modulation-based image watermarking using digital holography</title><title>Journal of the Optical Society of America. A, Optics, image science, and vision</title><addtitle>J Opt Soc Am A Opt Image Sci Vis</addtitle><description>We propose a blind watermarking method where the watermark is a hologram itself. In the proposed approach, the quantized phase of the hologram is embedded into the wavelet-transformed host image using quantization index modulation. In the detection stage, wavelet transform of the watermarked image followed by a minimum distance decoder is used. The proposed method is blind since it requires only information about the quantizers and the parameters of the hologram recording process. The robustness of the proposed technique is tested against several attacks such as filtering, compression, occlusion, and cropping. 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subjects	Computer-generated holograms Computers in experimental physics Exact sciences and technology Fundamental areas of phenomenology (including applications) Holography Image forming and processing Image processing Imaging and optical processing Instruments, apparatus, components and techniques common to several branches of physics and astronomy Optics Physics
title	Quantization index modulation-based image watermarking using digital holography
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