The purpose of this research is to study quantitatively edge enhancement effects of different digital halftone algorithms, especially on Error diffusion and Linear Pixel Shuffling algorithms. It has been known that by changing the amount of error and the spread of error when processing original images, different edge enhancement effects are observed. In many cases sometimes an unsymmetrical edge enhancement phenomenon occurs at the junction of different gray levels. A new metric for describing edge enhancement effects is introduced. This metric is shown to be consistent and reliable. In order to describe the unsymmetrical edge enhancement phenomenon in some cases, a new unsymmetrical metric is introduced. Both of these metrics are expected to provide useful quantitative measurements of edge enhancement effects in various different halftone algorithms.
Imaging Science (BS)
Department, Program, or Center
Chester F. Carlson Center for Imaging Science (COS)
Gunawan, Sunadi, "Analysis of the edge effect of error propagation in digital halftones" (2001). Thesis. Rochester Institute of Technology. Accessed from
RIT – Main Campus