Design of color screen tile vector sets

TLDR: This paper addresses issues on finding optimal color screen sets which produce the minimal visible moiré and homogeneous halftone texture and proposes new features includingHalftone microtexture spectrum analysis, common periodicity, and twist factor to achieve these goals.

Abstract: For electrophotographic printers, periodic clustered screens are preferable due to their homogeneous halftone texture and their robustness to dot gain. In traditional periodic clustered-dot color halftoning, each color plane is independently rendered with a different screen at a different angle. However, depending on the screen angle and screen frequency, the final halftone may have strong visible moire due to the interaction of the periodic structures, associated with the different color planes. This paper addresses issues on finding optimal color screen sets which produce the minimal visible moire and homogeneous halftone texture. To achieve these goals, we propose new features including halftone microtexture spectrum analysis, common periodicity, and twist factor. The halftone microtexture spectrum is shown to predict the visible moire more accurately than the conventional moire-free conditions. Common periodicity and twist factor are used to determine whether the halftone texture is homogeneous. Our results demonstrate significant improvements to clustered-dot screens in minimizing visible moire and having smooth halftone texture.