Restoration of error-diffused images using projection onto convex sets


Unal G. , CETIN A.

IEEE TRANSACTIONS ON IMAGE PROCESSING, cilt.10, ss.1836-1841, 2001 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 10 Konu: 12
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1109/83.974568
  • Dergi Adı: IEEE TRANSACTIONS ON IMAGE PROCESSING
  • Sayfa Sayıları: ss.1836-1841

Özet

In this paper, a novel inverse halftoning method is proposed to restore a continuous tone image from a given half-tone image. A set theoretic formulation is used where three sets are defined using the prior information about the problem. A new space-domain projection is introduced assuming the halftoning is performed using error diffusion, and the error diffusion litter kernel is known. The space-domain, frequency-domain, and space-scale domain projections are used alternately to obtain a feasible solution for the inverse halftoning problem which does not have a unique solution.