Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei 11529, Taiwan.
IEEE Trans Image Process. 2013 Mar;22(3):1199-208. doi: 10.1109/TIP.2012.2228491. Epub 2012 Nov 20.
In this paper, a new class tiling designed dot diffusion along with the optimized class matrix and diffused matrix are proposed. The result of this method presents a nearly periodic-free halftone when compared to the former schemes. Formerly, the class matrix of the dot diffusion is duplicated and orthogonally tiled to fulfill the entire image for further thresholding and quantized-error diffusion, which accompanies subsequent periodic artifacts. In our observation, this artifact can be solved by manipulating the class tiling with comprising rotation, transpose, and alternatively shifting of the class matrices. As documented in the experimental results, the proposed dot diffusion has been compared with the former halftoning methods with parallelism in terms of image quality, processing efficiency, periodicity, and memory consumption; the proposed dot diffusion exhibits as a very competitive candidate in the printing/display market.
在本文中，提出了一种新的类平铺设计点扩散，以及优化的类矩阵和扩散矩阵。与以前的方案相比，该方法的结果呈现出几乎无周期性的半色调。以前，点扩散的类矩阵被复制并正交平铺以填充整个图像，以便进一步进行阈值处理和量化误差扩散，这伴随着随后的周期性伪影。在我们的观察中，通过旋转、转置和交替移动类矩阵来操作类平铺可以解决这个伪影问题。正如实验结果所记录的，所提出的点扩散与以前的半色调方法在图像质量、处理效率、周期性和内存消耗方面进行了并行比较；所提出的点扩散在打印/显示市场中是一个非常有竞争力的候选者。
