Advances in digital image processing for document reproduction
- 164 Downloads
The properties of conventional, ordered dot-pattern generation techniques for bi-level halftone representation are examined and compared with the properties of error-diffusion-based, disordered dot-pattern-generation algorithms. The various processing steps necessary for adaptation of the disordered halftone pattern-generation technique to digital image hardcopy reproduction with non-ideal computer-output printing devices are described. It includes procedures for spatial distribution of thresholding errors, suppression of dot-density artifacts and compensation for dot overlap. These procedures represent the core of a Multiple-Error Correction Computation Algorithm called MECCA, the objective of which is to linearize the non-ideal printing process in order to minimize the loss or shift of tonal gradations. Finally, the performance of MECCA is compared with a conventional digital screening technique, and the various reproduction-quality versus computational-complexity trade-offs are discussed.
KeywordsSpatial Frequency Error Diffusion Error Filter Screening Resolution Printing Device
Unable to display preview. Download preview PDF.
- P. Stucki, ‘Statistical Measurements for Television Picture Classification and Some Experiments in Video Signal Encoding', DIC Thesis, Imperial College of Science and Technology, London, July 1968.Google Scholar
- J. O. Limb, ‘Design of Dither Waveforms for Quantized Visual Signals', Bell Syst. Tech. J., Vol. 48, No. 7, 1969.Google Scholar
- B. E. Bayer, ‘An Optimum Method for Two-Level Rendition of Continuous-Tone Pictures', International Conference on Communications, Conference Record, CAT. No. 73 CHO 744-3CSCB, June 1973.Google Scholar
- P. Stucki, ‘Comparison and Optimization of Computer-Generated Digital Halftone Pictures', SID Digest of Technical Papers, Vol. VI, 1975.Google Scholar
- G. C. Higgins and K. Stultz, ‘Visual Acuity as Measured with Various Orientations of a Parallel-Line Test Object', J. Opt. Soc. Am., Vol. 38, No. 9, 1948.Google Scholar
- P. Stucki, ‘Image Processing for Document Reproduction’ in Advances in Digital Image Processing, P. Stucki, Ed., Plenum Press, NY, 1979.Google Scholar
- K. Y. Wong and P. Stucki, ‘Adaptive Switching of Dispersed and Clustered Dot Patterns for Bi-Level Halftone Rendition', SID Digest of Technical Papers, Vol. VIII, 1977.Google Scholar
- R. Floyd, ‘An Adaptive Algorithm for Spatial Gray-Scale', SID Digest of Technical Papers, Vol. VI, 1975.Google Scholar
- J. F. Jarvis, C. N. Judice and W. H. Ninke, ‘A Survey of Techniques for the Display of Continuous-Tone Pictures on Bilevel Displays', Computer Graphics and Image Processing, Vol. 5, No. 1, 1976.Google Scholar
- F. W. Campbell, ‘The Human Eye as an Optical Filter', Proc. IEEE, Vol. 56, No. 6, 1968.Google Scholar
- F. R. Clapper and J. A. C. Yule, ‘The Effect of Multiple Internal Reflections on the Densities of Half-Tone Prints on Paper', J. Opt. Soc. Am., Vol. 43, No. 7, 1953.Google Scholar