摘要
根据人眼的空间均衡特征,通过对图像进行区域分割预处理,采取多行扫描(Multi-lineScan)、标记分享(Mark-sharing)的方法,文章提出了基于多行扫描的像素不扩展视觉密码方案(以下称MSM-VCS)。该方案较好地解决了恢复图像中相邻区域界线模糊及颗粒较大的现象,并提高了分享时的处理效率。实验结果表明,应用本方案分享图像耗费的时间更少,且所得的恢复图像具有更好的视觉效果。
Based on characteristic that the human visual system averages over close pixels' gray levels, through preprocessing of region segmentation and multi-line scan in mark-sharing process, a multi-line scan based pixel unexpanded MSM visual cryptography scheme has been proposed. The scheme has resolved out the problems not only that the boundary between neighboring regions is dim, but also that granularity is much larger, and has increased efficiency. Experimental results demonstrate that the time for sharing is much less, and the recovered image has much better visual effect.
出处
《信息工程大学学报》
2007年第2期156-160,共5页
Journal of Information Engineering University
关键词
视觉密码
秘密分享
像素不扩展
多行扫描
标记分享
visual cryptography
secret sharing
pixel unexpanded
multi-line scan
mark-sharing