@article{Steinberg1992_0,<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Abstract = {An analytical approach is proposed to explain the appearance of unwanted low-frequency artifacts in halftoned images when using random dithering. The research is based on a theorem that relates the correlation of the input (continuous) gray-level signal to the correlation of the (halftone) binary output signal. This second-order statistical analysis alludes to the claim that the introduction of low-frequency artifacts is inevitable, being an intrinsic property of the dithering process rather than of individual images or masks. In addition, high-frequency information in the continuous image is attenuated more than low-frequency information. This effect is enhanced for mean gray levels farther from mid-gray.},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Author = {Eran Steinberg and Robert J.  Rolleston and Roger L.  Easton},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Journal = {Journal of Electronic Imaging},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Keywords = {artifacts},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Month = {},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Number = {},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pages = {396--404},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Title = {Analysis of random dithering patterns using second-order statistics},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Url = {},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Volume = {1},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Year = {1992}}