COMPRESSION METHOD FOR DYNAMIC RANGE OF DIGITAL FOURIER HOLOGRAM WHILE EMBEDDING HIDDEN WATERMARKS
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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.