Abstract
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 filter 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1836-1841 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Image Processing |
| Volume | 10 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 2001 |
| Externally published | Yes |
Funding
Manuscript received November 10, 1999; revised September 1, 2001. This work was supported in part by NATO under Grant CRG-971117 and was carried out at Bilkent University, Ankara, Turkey. The associate editor coordinating the review of this manuscript and approving it for publication was Prof. Timothy J. Schulz.
| Funders | Funder number |
|---|---|
| North Atlantic Treaty Organization | CRG-971117 |
Keywords
- Error diffusion
- Inverse error diffusion
- Inverse halftoning
- Projection onto convex sets (POCS)
- Restoration