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IEICE TRANSACTIONS on Fundamentals

A Generation Method of Amplitude-Only Images with Low Intensity Ranges

Wannida SAE-TANG, Masaaki FUJIYOSHI, Hitoshi KIYA

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Summary :

In this paper, 1) it is shown that amplitude-only images (AOIs) have quite wide intensity ranges (IRs), and 2) an IR reduction method for AOIs is proposed. An AOI is the inversely transformed amplitude spectra of an image, and it is used in the privacy- and copyright-protected image trading system because of its invisibility. Since an AOI is the coherent summation of cosine waves with the same phase, the IR of the AOI is too large to be stored and/or transmitted. In the proposed method, random signs are applied to discrete Fourier transformed amplitude coefficients to obtained AOIs with significantly lower IRs without distortion while keeping the invisibility of images. With reasonable processing time, high correct watermark extracting rates, inversely quantized AOIs with low mean squared errors, and reconstructed images with high peak signal-to-noise ratios are obtained by a linear quantizer in the proposed method.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E96-A No.6 pp.1323-1330
Publication Date
2013/06/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.E96.A.1323
Type of Manuscript
Special Section PAPER (Special Section on Circuit, System, and Computer Technologies)
Category

Authors

Wannida SAE-TANG
  Tokyo Metropolitan University
Masaaki FUJIYOSHI
  Tokyo Metropolitan University
Hitoshi KIYA
  Tokyo Metropolitan University

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