A new digital screening method based on prefabricated functions

In order to improve the quality and efficiency of printing, a new digital screening method based on the concept of prefabricated functions is proposed in this paper. Nine functions corresponding to different screening schemes are established in advance according to the direction relations of pixels. Then one of the screening scheme could be called to complete the screening operations on the basis of the gradient values of pixel to be screened and the around eight pixels. The simulation results show that compared with the traditional digital screening methods, the prefabricated functions algorithm can effectively improve the performance and execution speed.