The main problem to research halftone digital watermarking is how to ensures the robust of watermark and the vision of halftone images at the same time.
半色调图像数字水印研讨的主要难点是如何在保证嵌入水印健壮性的前提下绝可能地保证宿主图像的视觉后果。
An overview of already proposed watermarking algorithms for halftone images is given, based on the introduction of three kinds of halftone methods, ordered dithering, error diffusion and pattern.
介绍了有序抖动、误差扩散和模板法三种图像半色调方法，在此基础上，综述了现有的半色调图像水印算法，并对其中的四种方法进行了比较。
A digital watermarking algorithm for halftone (binary) images was proposed.
针对半色调(二值)图像提出一种新的数字水印算法。
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