Halftoning Method and Reproduction of Color Gamut in Digital Image Output

Abstract:

Image halftoning is the core technique of digital image output, which determines the quality of the color and tonal gradation reproduction. In this paper, the existing halftoning techniques were analyzed and evaluated, such as FM halftoning and AM halftoning, etc. And a new halftoning mode, frequency conversion amplitude modulation (FCAM), was proposed. This method is still based on AM halftoning, but it uses the different screen frequency for halftoning image of the different color version, so as to avoid moiré fringes on the smaller superposition angle. The use of new halftoning model can achieve halftoning image output which is more than 4 colors (such as 6 colors or 7 colors) without visual moirè pattern when overprinting. By the new technique, high-fidelity printing is achieved, and the color gamut of the output image is expanded, and we can get more vivid realistic effect of image transmission. We tested color gamut expansion of 6 colors and 7 colors high-fidelity printing, and obtained the expected conclusion by quantitative analysis.

• Periodical: Applied Mechanics and Materials (Volume 421)
• Pages: 138-143
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.421.138
• Online since: September 2013
• Authors: Guang Xue Chen, Qi Feng Chen, Jing Lei Tai, Jiang Wen Liu
• Keywords:

  Found Keywords

  Digital Image

  , Color Gamut, Halftoning, Moiré, Reproduction

References

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