Abstract: The authors proposed a new pattern encoding method of the visual 2D barcode based on halftone technology and texture features in halftone images. Combining the similarity of halftone texture with the distribution of encoded information in code-image, the authors also defined code-patterns to denote 0 and 1 and carried on pattern replacement to encode with the principle of consistency of local gray level. The experimental results show that the proposed method improves the encoding capacity and visual effect of coded images.

Key words: visual 2D barcode, halftone image, texture, pattern encoding, code-pattern

摘要： 根据半色调技术原理及半色调图像的纹理特征，提出一种新的可视二维条码编码方法——模式编码。结合纹理相似性和编码信息在码图中的分布情况确定表示0和1的编码模式，以局部灰度一致为原则进行模式转换，通过改变码图局部的纹理结构进行编码。新的编码方法在编码容量和图像的视觉效果上都有了较大提高。

关键词: 可视二维条码, 半色调图像, 纹理, 模式编码, 编码模式