An adaptive inverse halftoning algorithm.
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.
Chen
L M
LM
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu.
Hang
H M
HM