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

被引：4

作者：

Sae-Tang, Wannida ^{[1
]}

Fujiyoshi, Masaaki ^{[1
]}

Kiya, Hitoshi ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, Grad Sch Syst Design, Hino, Tokyo 1910065, Japan

来源：

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES | 2013年 / E96A卷 / 06期

基金：

日本学术振兴会;

关键词：

random sign; intensity range reduction; quantization; amplitude-only image; copyright protection; REGISTRATION;

D O I：

10.1587/transfun.E96.A.1323

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

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.

引用

页码：1323 / 1330

页数：8

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