Abstract

Electronic halftoning techniques are used to convert graytone pictures into binary representations. With the processing possibilities active procedures—so-called error correction and distribution methods—were introduced. The sequential execution which these methods permit allows the local error between graytone and binary picture to be incorporated into the decision process of the states of the next unprocessed pixels. This process may be regarded as a feedback system where the error can be distributed with different weights and signs. With the choice of the possible parameters, the stability of the feedback system is influenced. The dependence of the binary picture on these parameters is described and illustrated by experimental results.

© 1986 Optical Society of America