A Fast Inverse Halftoning Algorithm using LUT Approach for Grey-level Images

Halftone images are often difficult to be processed without causing severe degradation contrary to grayscale images. This gives the purpose to improve many techniques to reconstruct from their corresponding halftones the continuous images that permits a wide range of operations during transmission or processing. The demand for fast image reproduction increases every day and much effort and research has been made on finding new methods and models for different tasks in the printing field. Since quality and speed are generally conflicting, it seems advantageous to come up with intermediate techniques providing better images in less time. The main work here emphasizes on the algorithm given in M. Mese and P.P. Vaidyanathan (2000), with new considerations in order to speed it up.