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Look-up-table based halftoning algorithm

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2 Author(s)
Pingshan Li ; Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA ; J. P. Allebach

Screening is a low complexity halftoning algorithm that has been widely used in many applications. However, screen design requires that the stacking property be obeyed. This constraint limits the texture quality at each gray level. We present a look-up-table based halftoning algorithm for which the stacking constraint is not necessarily satisfied; but the binary patterns for individual levels are still correlated. The binary patterns are designed level by level using the direct binary search method. The algorithm improves halftone image quality compared with screening

Published in:

IEEE Transactions on Image Processing  (Volume:9 ,  Issue: 9 )