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Digital holography-based steganography
Optics Letters, 2010A steganographic method offering a high hiding capacity is presented in which the techniques of digital holography are used to distribute information from a small secret image across the larger pixel field of a cover image. An iterative algorithm is used to design a phase-only or complex hologram from a padded version of the secret image, quantizing ...
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Multiwavelength Digital Holography
2015Another application of HI is the generation of a fringe pattern corresponding to contours of constant elevation with respect to a reference plane (see Fig. 7.1). Such contour fringes can be used to determine the shape of a 3D object. Holographic contour interferograms can be generated by the two-illumination-point method (discussed in Section 5.2 ...
Georges T. Nehmetallah +2 more
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SPIE Proceedings, 2011
We have created a programming tool which uses image data provided by webcam connected to personal computer and gives user an ability to see the future digital hologram preview on his computer screen, before sending video data to holographic printing companies.
Stanislovas Zacharovas +2 more
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We have created a programming tool which uses image data provided by webcam connected to personal computer and gives user an ability to see the future digital hologram preview on his computer screen, before sending video data to holographic printing companies.
Stanislovas Zacharovas +2 more
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Strain, 2008
Abstract: Terahertz (THz) technology is combined with digital holography for THz imaging. The characteristics of the propagation behaviour of the THz pulse in free space are investigated by using numerical simulations. The algorithm is based on the angular spectrum theory.
Y. Zhang +4 more
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Abstract: Terahertz (THz) technology is combined with digital holography for THz imaging. The characteristics of the propagation behaviour of the THz pulse in free space are investigated by using numerical simulations. The algorithm is based on the angular spectrum theory.
Y. Zhang +4 more
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Digital Holography Configurations
2011Some of the general characteristics of digital holographic images are illustrated using simulated examples. Holographic image location and magnification are dependent on, and therefore can be controlled by, the choice of wavelengths and reference directions and curvatures.
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