A Halftoning Method Using Circular Cell

Abstract

A halftoning method using circular cell is the method which generates finely dispersed dots. However, there were problems that the optical density is unstable and the granular noise increases in the case that this method is applied to an electrophotography, because the size of the dot is fixed in 1 pixel. These problems were solved by controlling the size of the dot according to the average value and contrast of the input value of the cell. We obtained excellent printed result using this modified method in comparison with AM screen method.