Journal
Scientific and technical journal of information technologies, mechanics and optics
UDK778.38:777.6
Issue:2 (72)
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COMPRESSION METHOD FOR DYNAMIC RANGE OF DIGITAL FOURIER HOLOGRAM WHILE EMBEDDING HIDDEN WATERMARKS
Annotation
The method of distortion decrease in image-container with embedded hologram of watermark based on hologram dynamic range changing by logarithmic transform is proposed. The proposed method provides decrease of distortions arising at image watermark restoration in comparison with conventional Fourier hologram method. Linear dependence has been exposed between changing of watermark signal amplitude and intensity average quadratic deviation of digital Fourier hologram.
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