Stochastic Moiré II

In color AM halftoning, moiré is the low frequency spatial artifact generated by the interference of superimposed primary color dot screens that adds an artificial texture to the printed image and renders the image visually unpleasing. When these overlapping dot screens that form FM halftones, this interference pattern follows a random spatial distribution resulting in "stochastic" moiré. In this paper, we show that stochastic moiré is at its most visible when two overlapping dither patterns have the same relative spacing between dots. We will also show the measured stochastic moiré visibility for several traditional error-diffusion algorithms.