Digital Fresnel hologram watermarking

Nishchal, Naveen K.; Pitkäaho, Tomi; Naughton, Thomas J.

doi:10.1109/wio.2010.5582496

Cited by 12 publications

(6 citation statements)

References 10 publications

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“…The fractional order parameter in FrFT offers extra security against attacks. The ciphertext is embedded into a conventional host image [14] or a Fresnel hologram [15]. Multiple watermarks can be encrypted by DRPE with different keys in FrFT domain and then multiplexed by superposition [16].…”

Section: Optical Watermarking With Double Random Phase Encoding (Drpe)mentioning

confidence: 99%

Review on optical image hiding and watermarking techniques

Jiao

Zhou

et al. 2019

Optics & Laser Technology

139

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Information security is a critical issue in modern society and image watermarking can effectively prevent unauthorized information access. Optical image watermarking techniques generally have advantages of parallel high-speed processing and multi-dimensional capabilities compared with digital approaches. This paper provides a comprehensive review on the research works related to optical image hiding and watermarking techniques conducted in the past decade.The past research works are focused on two major aspects, various optical systems for image hiding and the methods for embedding optical system output into a host image. A summary of the state-of-the-art works is made from these two perspectives.

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Section: Optical Watermarking With Double Random Phase Encoding (Drpe)mentioning

confidence: 99%

Review on optical image hiding and watermarking techniques

Jiao

Zhou

et al. 2019

Optics & Laser Technology

139

View full text Add to dashboard Cite

show abstract

“…However, an example may be given of an interesting algorithm [42] which uses phase drift modulation, obtaining high robustness against different types of attacks, including transmissions through UKF data channels. Relatively smallest is the amount of articles on watermarking texts [20,39,54] and 3D objects [40].…”

Section: Introductionmentioning

confidence: 99%

Parallel blind digital image watermarking in spatial and frequency domains

Lenarczyk

Piotrowski

2013

Telecommun Syst

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The protection of copyrights of digital images authors is one of the most important tasks set before watermarking. What is especially important is to ensure the high robustness of a watermarked images against attacks, preventing the reading of additional information about the author. In addition, the used processing of the original image must be absolutely invisible. The presented algorithm embeds information in a parallel way-independently of the luminance and chrominance matrices in the spatial and frequency domains. The main factor motivating the use of a parallel watermark embedding via the proposed way was the mutual complementing of robustness, offered by processing in spatial and frequency domains. Additional information is recovered in a 2D cepstrum domain and in coefficients of the cosine transform. The article shows a description of a mathematical model, tests of invisibility, effectiveness and the robustness of the method were carried out. The robustness of the algorithm was shown against the following attacks: JPEG and JPEG2000 lossy compression, noise, median filtering, Low-Pass and High-Pass filtering, desynchronization, simple and inverse D/A conversion, majority cropping, photomontage and affine transforms-rotation, scaling, shearing, translation.

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“…Our method belongs to the latter category. Although techniques for hiding images in gray holograms have been developed in the past (such as [20][21][22]), embedding additional information requires modifying the original intensities of certain pixels to different values within a dynamic range. As such, these methods are not applicable to a binary hologram as the intensity of each pixel in the latter can only be either black or white.…”

Section: Introductionmentioning

confidence: 99%

Intensity image-embedded binary holograms

2012

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Past research has demonstrated that, by downsampling the source object scene in multiple directions, a binary Fresnel hologram can be generated to preserve favorable quality on the reconstructed image. In this paper, we will show that a binary hologram generated with such an approach is also insensitive to noise contamination. On this basis, we propose a method to embed an intensity image into the binary hologram. To prevent the embedded information from being tampered or retrieved with unauthorized means, scrambling is applied to relocate each pixel to a unique position in the binary hologram according to a random assignment that is only known with the availability of a descrambling key. Experimental results demonstrate that our proposed method is capable of embedding an intensity image that is one quarter the size of the binary hologram without causing observable degradation on the reconstructed image. In addition, the embedded image can be retrieved with acceptable quality even if the binary hologram is damaged and contaminated with noise.

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Digital Fresnel hologram watermarking

Cited by 12 publications

References 10 publications

Review on optical image hiding and watermarking techniques

Review on optical image hiding and watermarking techniques

Parallel blind digital image watermarking in spatial and frequency domains

Intensity image-embedded binary holograms

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