HALFTONING SCREEN GENERATING DEVICE AND A METHOD, A PRINTING CONTROL TERMINAL DEVICE AND A METHOD, AN IMAGE FORMING DEVICE AND A READABLE COMPUTER RECORDING MEDIUM CAPABLE OF INCREASING IMAGE QUALITY OF AN OUTPUT IMAGE

摘要

PURPOSE: A halftoning screen generating device and a method, a printing control terminal device and a method, an image forming device and a readable computer recording medium are provided to output an image which moire and low frequency noise are not generated in a low resolution environment, thereby increasing image quality of an output image.;CONSTITUTION: A dot center arranging unit(320) arranges a dot center in a screen based on screen information. A voronoi calculating unit(330) calculates a voronoi value about each dot in the screen which the dot center is arranged. A filter calculating unit(340) calculates a filter value about each dot in the screen which the dot center is arranged. A dot value setting unit(350) set a dot value in the screen based on the voronoi value and the filter value. The screen information includes the number of the dot center and a constant determining a screen size, a frequency and a dot growth shape.;COPYRIGHT KIPO 2013;[Reference numerals] (310) Input unit; (320) Dot center arranging unit; (331) Area dividing unit; (333) Triangle dividing unit; (335) Output unit; (340) Filter calculating unit; (350) Dot value setting unit; (360) Control unit