摘要
分析最新的数字加网技术,对混合加网的算法进行了改进。首先根据图像阶调变化快慢对待加网图像进行区域分割,对阶调变化平缓的区域采用点聚集态抖动加网,对阶调变化剧烈及细微的层次采用AM/FM半色调方法。利用了调幅、调频加网各自的优势,改善了调幅与调频半色调之间的过渡,实现了在较低分辨率的设备上得出高精度的输出图像。
An improved hybrid halftoning which combined the AM and the FM methods was proposed,First the image was segmented by grads, and then an AM/FM halftoning was adopted in the acute area. The algorithm efficiently improves the transition area between AM and FM halftoning. Besides, the precision of the output image was realized on low precision equipment.
出处
《包装工程》
CAS
CSCD
北大核心
2008年第3期15-17,26,共4页
Packaging Engineering
