半色调图片中的隐藏图像。
Hidden images in halftone pictures.
作者信息
Rosen J, Javidi B
出版信息
Appl Opt. 2001 Jul 10;40(20):3346-53. doi: 10.1364/ao.40.003346.
PMID:18360358
Abstract
A method of concealing an image in a different halftone image is proposed. Continuous-tone levels of the visible images are represented by the area of the halftone dots. However, the hidden image is encoded by the dots' positions inside their cells. Only a spatial correlator with a unique filter function can reveal the hidden image from the halftone picture. The technique and its robustness to noise and distortions are demonstrated.
摘要
提出了一种在不同半色调图像中隐藏图像的方法。可见图像的连续色调水平由半色调点的面积表示。然而，隐藏图像是通过点在其单元格内的位置进行编码的。只有具有独特滤波函数的空间相关器才能从半色调图片中揭示隐藏图像。展示了该技术及其对噪声和失真的鲁棒性。
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