利用六边形网格实现半色调抖动技术的研究

针对传统的半色调抖动技术存在水平和竖直方向上的人工痕迹以及网格化轮廓等缺陷，提出了一种新颖的基于六边形网格的抖动矩阵构造方法。首先，将原驱散式Bayer抖动矩阵进行元素重组和离散旋转以构造一个更为合理的抖动矩阵，然后按照新矩阵对图像进行半色调化处理。实验结果表明，该抖动算法不但能够显著消除传统抖动技术所存在的不利因素，而且比其他同类的改进抖动算法具有更强的色调再现能力和细节表现力。

Research of half-toning dithering technique using hexagon grids

With the issue that most traditional dithering techniques may bring horizontal and vertical artifacts and grid contouring effects，a novel method of constructing the dither matrix is proposed.First of all，a more reasonable dither matrix is constructed through element re-composition and discrete rotation based on the primary dispersed-dot Bayer dither matrix.Then，the new matrix is used for half-toning to remove the above disadvantages effectively.Experiment results show that the new dither algorithm has stronger capabilities of tone reproduction and detail representation compared with other congener progressive dither algorithms.