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Inkjet printer model-based halftoning.

Je-Ho Lee1, Jan P Allebach

  • 1School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907-1285, USA. je-ho.lee@hp.com

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|May 13, 2005
PubMed
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This study introduces model-based halftoning for inkjet (IJ) printers, improving print quality by reducing dot errors. New methods for direct binary search and tone-dependent error diffusion effectively suppress artifacts in IJ printing.

Area of Science:

  • Image processing
  • Computer vision
  • Print technology

Background:

  • Inkjet (IJ) printer halftone quality is often degraded by random dot-placement errors.
  • Existing research on model-based halftoning primarily focuses on electrophotographic printers, with limited work on IJ printers.
  • Addressing these limitations is crucial for enhancing digital print fidelity.

Purpose of the Study:

  • To propose and evaluate model-based halftoning techniques for inkjet printers.
  • To develop novel approaches for iterative least-squares halftoning and tone-dependent error diffusion (TDED) tailored for IJ printing.
  • To mitigate artifacts caused by random dot placement in inkjet halftones.

Main Methods:

  • Implemented direct binary search (DBS) using a stochastic model based on measured IJ halftone dot statistics.

Related Experiment Videos

  • Developed tone-dependent error diffusion (TDED) by training weights and thresholds to replicate the spectral characteristics of model-based DBS.
  • Utilized a metric ensuring correct radial spectral profiles and angular symmetry for TDED training.

    • Main Results:

    • Both IJ model-based DBS and IJ model-based TDED demonstrated significant effectiveness in suppressing IJ printer-induced artifacts.
    • Simulated and real printer experiments confirmed the superior performance of the proposed model-based methods.
    • The developed techniques successfully reduced common halftone quality issues in inkjet prints.

    Conclusions:

    • Model-based halftoning approaches, specifically DBS and TDED, offer substantial improvements for inkjet printing.
    • The proposed methods effectively address the challenge of random dot-placement errors in IJ halftones.
    • This research provides valuable techniques for enhancing the quality and fidelity of inkjet halftone prints.