An adaptive inverse halftoning algorithm

  • Authors:

  • Li-Ming Chen;Hsueh-Ming Hang

  • Affiliations:

  • Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu;-

  • Venue:
  • IEEE Transactions on Image Processing
  • Year:
  • 1997

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Abstract

A class of inverse halftoning algorithms that recovers grayscale (continuous-tone) images from halftone images is proposed. The basic structure is an optimized linear filter. Then, a properly designed adaptive postprocessor is employed to enhance the recovered image quality. Finally, a multistage space-varying algorithm is developed that uses the basic linear filter structure as before but with spatially adaptive parameters