Halftone to continuous-tone conversion of error-diffusion codedimages |
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Authors: | Hein S. Zakhor A. |
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Affiliation: | Semicond. Div., Siemens AG, Munich. |
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Abstract: | Considers the problem of reconstructing a continuous-tone (contone) image from its halftoned version, where the halftoning process is done by error diffusion. The authors present an iterative nonlinear decoding algorithm for halftone-to-contone conversion and show simulation results that compare the performance of the algorithm to that of conventional linear low-pass filtering. They find that the new technique results in subjectively superior reconstruction. As there is a natural relationship between error diffusion and SigmaDelta modulation, the reconstruction algorithm can also be applied to the decoding problem for SigmaDelta modulators. |
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