We present an efficient, purely geometric, algorithmic, and parameter free approach to improve surface quality accuracy in voxel-controlled 3D printing by counteracting quantization artifacts. Such artifacts arise due the discrete voxel sampling of continuous shape used control printer, are characterized low-frequency geometric patterns on surfaces any orientation. They visually disturbing, par...

Slide gate dithering can reduce nozzle clogging and sticking during continuous casting, but also influences transient flow in the mold and meniscus level fluctuations. In this work, a semi-analytical model was first developed and validated to predict nozzle flow rate from slide-gate opening position. A transient CFD model of 3-D turbulent flow was then validated with surface velocity measuremen...

— Itis proved that thefamily of finite index matrix languages coincides with the families of finite index random context languages generated withforbidding sets and with or without X-rules and is included in thefamily of finite index conditional languages. Finally, the Szilard languages associated to finite index matrix grammars are briefly investigated. Résumé. — On montre que lafamille de lan...

The recently proposed dithering techniques could substantially improve measurement quality when fringes are wide, but offer limited improvement when fringes are narrow. This Letter presents a genetic algorithm to optimize the dithering technique for sinusoidal structured pattern representation. We believe both simulation and experimental results show that this proposed algorithm can substantial...

This paper examines the possibilities of improving halftoning techniques using dispersed dots. This corresponds to finding micro-dot distributions that approximate the intensity levels that have to be rendered. A widely used halftoning method is ordered dithering, which uses a threshold matrix to decide if a micro-dot should be set in the output image. A way to generate improved threshold matri...

One-dimensional Dithering