Title :
An adaptive inverse halftoning algorithm
Author :
Chen, Li-Ming ; Hang, Hsueh-Ming
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
8/1/1997 12:00:00 AM
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
Keywords :
adaptive filters; adaptive signal processing; filtering theory; image enhancement; inverse problems; adaptive inverse halftoning algorithm; adaptive postprocessor; continuous-tone images; grayscale image recovery; halftone images; multistage space-varying algorithm; optimized linear filter; recovered image quality enhancement; spatially adaptive parameters; Algorithm design and analysis; Finite impulse response filter; Gray-scale; Image quality; Image reconstruction; Iterative algorithms; Nonlinear filters; PSNR; Pixel; Signal processing algorithms;
Journal_Title :
Image Processing, IEEE Transactions on
