Model-based deduction of CMYK surface coverages from visible and infrared spectral measurements of halftone prints

Bugnon, Thomas; Brichon, Mathieu; Hersch, Roger D.

doi:10.1117/12.704063

Cited by 11 publications

(11 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After measurement of the reflection spectra of all representative two-by-two patterns, any halftone print can by tiled into representative two-by-two patterns and the reflectance of specific areas can be predicted thanks to Eqs. (20) or (21), where the n-value is generally similar for single ink or multiple ink halftones. This n-value can therefore be learned from a set of single ink halftones, printed on paper and on different solid colorants, for example the halftones shown in Figure 3, rows C and F.…”

Section: Figure 7 (A) Representative Two-by-two Square Patterns G0 Tmentioning

confidence: 99%

“…(20) or (21) may vary. Since the representative two-by-two square patterns already incorporate the optical dot gain induced by its 4 neighboring pixels, these optimal n-values are generally smaller than the ones used for predicting the reflectance of the same halftones with the YuleNielsen modified spectral Neugebauer model presented in Section 3.…”

Section: Figure 7 (A) Representative Two-by-two Square Patterns G0 Tmentioning

confidence: 99%

“…between 730 nm and 850 nm. Classical CMY dye-based inks do not absorb light in this range, whereas pigment-based black inks generally absorb light in the near infrared wavelength range [20].…”

Section: Four-ink Halftonesmentioning

confidence: 99%

“…Since the "microscopic" reflectance of each two-by-two labeled unit square is known, the "macroscopic" reflectance of a larger tile can be computed, for example a tile covering the area of a halftone. The reflectance of an image area formed by an assembly of two-by-two unit square reflectances may be calculated with the Yule-Nielsen modified spectral Neugebauer model (YNSN), according to Equation (20), where i m is the number of occurrences of representative two-by-two pattern G m in the considered area and R m () is its corresponding measured spectral reflectance:…”

Section: Figure 7 (A) Representative Two-by-two Square Patterns G0 Tmentioning

confidence: 99%

See 3 more Smart Citations

Review of spectral reflectance models for halftone prints: Principles, Calibration, and prediction accuracy

Hébert

Hersch

2014

Color Research & Application

View full text Add to dashboard Cite

show abstract

Section: Figure 7 (A) Representative Two-by-two Square Patterns G0 Tmentioning

confidence: 99%

Section: Figure 7 (A) Representative Two-by-two Square Patterns G0 Tmentioning

confidence: 99%

Section: Four-ink Halftonesmentioning

confidence: 99%

Section: Figure 7 (A) Representative Two-by-two Square Patterns G0 Tmentioning

confidence: 99%

See 2 more Smart Citations

Review of spectral reflectance models for halftone prints: Principles, Calibration, and prediction accuracy

Hébert

Hersch

2014

Color Research & Application

View full text Add to dashboard Cite

show abstract

“…The spectral measurements span the visible wavelength range ͑380-730 nm͒, and in order to avoid the ambiguity between chromatic black and pure black 15 are extended to cover the near infrared (NIR) wavelength range ͑730-850 nm͒. The NIR wavelength range enables distinguishing the light absorbing pigment-based black ink and the cmy inks which are dye-based and do not absorb light in the NIR wavelength range.…”

Section: The Ink Spreading Equationsmentioning

confidence: 99%

Deducing Ink Spreading Curves from Reflection Spectra Acquired Within Printed Color Images

Hersch¹,

Brichon²,

Bugnon³

et al. 2009

jist

View full text Add to dashboard Cite

Abstract. The Yule-Nielsen modified spectral Neugebauer model (YNSN) enhanced for accounting for ink spreading in the different INTRODUCTIONThe goal of a color reproduction system is to be able to reproduce input colors as accurately as possible. This is not a trivial task since the human visual system is very sensitive to small color differences. In printing systems, there are many factors influencing the range of printable colors: the inks, the substrate (paper, plastic, glass, etc.), the illumination conditions, and the halftones. Spectral reflection prediction models are helpful in studying the influence of these factors and in creating printer characterization profiles for the purpose of color management.

show abstract

Base Models for Color Halftone Reproduction

Hersch

Hébert

2015

Handbook of Digital Imaging

View full text Add to dashboard Cite

One of the main challenges for the characterization of printing systems consists, for a given substrate, in establishing the relationship between surface coverages of the selected set of inks and the spectral reflectances of the printed ink halftones. Knowledge of the spectral reflectances of print halftones enables deducing their colors. Models enabling the prediction of spectral reflectances as a function of surface coverages of the inks are helpful in characterizing printers and in creating printer profiles. The presented base models for color halftone reproduction are either surface models such as the Yule-Nielsen modified spectral Neugebauer model or physically inspired models accounting for the interaction of light, inks and substrate such as the Clapper-Yule model. As a complement to reflectance prediction models, we introduce ink spreading models that account for the interaction between superposed ink halftones and the substrate. They help understanding and modeling the dot gain phenomena present in most printing systems. Finally, we compare the prediction accuracies of the different models for different printing technologies, paper types and screen frequencies.

show abstract

Model-based deduction of CMYK surface coverages from visible and infrared spectral measurements of halftone prints

Cited by 11 publications

References 11 publications

Review of spectral reflectance models for halftone prints: Principles, Calibration, and prediction accuracy

Review of spectral reflectance models for halftone prints: Principles, Calibration, and prediction accuracy

Deducing Ink Spreading Curves from Reflection Spectra Acquired Within Printed Color Images

Base Models for Color Halftone Reproduction

Contact Info

Product

Resources

About