Dr. Doron Shaked Profile

Dr. Doron Shaked

Sr. Research Scientist at Hewlett-Packard Labs

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Publications (16)

Proceedings Article | 25 January 2012 Paper

Psychophysical evaluation of banding visibility in the presence of print content

Jia Zhang, Hila Nachlieli, Doron Shaked, Smadar Shiffman, Jan Allebach

Proceedings Volume 8293, 82930S (2012) https://doi.org/10.1117/12.911937

KEYWORDS: Visibility, Printing, Human-machine interfaces, Image quality, Visualization, Image resolution, Prototyping, LCDs, Computer simulations, Image processing

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Proceedings Article | 25 January 2012 Paper

Masking mediated print defect visibility predictor

Xiaochen Jing, Hila Nachlieli, Doron Shaked, Smadar Shiffman, Jan Allebach

Proceedings Volume 8293, 82930R (2012) https://doi.org/10.1117/12.911912

KEYWORDS: Visibility, Digital imaging, Image quality, Printing, Process modeling, Visual process modeling, Image processing, Image segmentation, Quantization, Visual system

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Proceedings Article | 25 January 2012 Paper

Measuring the modulation transfer function of image capture devices: what do the numbers really mean?

Xujie Zhang, Tamar Kashti, Dror Kella, Tal Frank, Doron Shaked, Robert Ulichney, Mani Fischer, Jan Allebach

Proceedings Volume 8293, 829307 (2012) https://doi.org/10.1117/12.912989

KEYWORDS: Modulation transfer functions, Modulation, Contrast transfer function, Scanners, Direct methods, Imaging systems, Cameras, Point spread functions, Reflectivity, Convolution

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Proceedings Article | 25 January 2012 Paper

The lattice-based screen set: a square N-color all-orders Moire-free screen set

Yung-Yao Chen, Mani Fischer, Tamar Kashti, Doron Shaked, Jan Allebach

Proceedings Volume 8292, 82920Y (2012) https://doi.org/10.1117/12.912297

KEYWORDS: Halftones, Printing, Color printing, Amplitude modulation, Frequency modulation, Superposition, Modulation, Spatial resolution, Binary data, Fermium

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Periodic clustered-dot screens are widely used for electrophotographic printers due to their print stability. However, moir´e is a ubiquitous problem that arises in color printing due to the beating together of the clustered-dot, periodic halftone patterns that are used to represent different colorants. This beating or interference phenomenon introduces spurious low frequency (large period) patterns in the printed output that are very objectionable to the viewer. The traditional solution in the graphic arts and printing industry is to rotate identical square screens to angles that are maximally separated from each other. For example, the classic three-color screen set rotates three identical square screens to the angles 15°, 45°, and 75°, respectively. However, the effectiveness of this approach is limited when printing with more than four colorants, i.e. N-color printing, where N >4. Moreover, accurately achieving the angles that have maximum angular separation requires a very high resolution plate writer, as is used in commercial offset printing. In this paper, we propose a systematic way to design color screen sets for periodic, clustered-dot screens that offers more explicit control of the moir´e properties of the resulting screens when used in color printing. We find a general concept for moir´e-free screen design that is called lattice-based screen design. The basic concept behind our approach is the creation of the screen set on a 2-dimensional lattice in the frequency domain and then picking each fundamental frequency vector of the individual colorant planes in the created spectral lattice according to the desired properties. The halftone geometry of a screen set is the set of angles and frequencies in units of lines per inch (LPI) of each screen plane. The lattice-based screen design offers more flexibility in designing N-color screen sets with different halftone geometries, and all of them are guaranteed to be all-orders moir´e-free. For example, by creating a square lattice in the frequency domain, square N-color moir´e-free screen sets that consist of N rotated square screens can be achieved. The proposed approach maintains the advantage of square clustered-dot screen design and is based on low addressability of digital printing. We also propose several symmetry measures, and use them to compare the proposed 4-color square screen set and the screen sets based on a previous moir´e-free N-color non-orthogonal approach. The proposed screen set is shown to have better symmetry properties.

Proceedings Article | 25 January 2012 Paper

Color-dependent banding characterization and simulation on natural document images

Sirui Hu, Hila Nachlieli, Doron Shaked, Smadar Shiffman, Jan Allebach

Proceedings Volume 8292, 82920W (2012) https://doi.org/10.1117/12.912901

KEYWORDS: Prototyping, CMYK color model, RGB color model, Printing, Signal processing, Curium, Principal component analysis, Modulation, Calibration, Scanners

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Proceedings Article | 25 January 2012 Paper

Modeling large-area influence in digital halftoning for electrophotographic printers

Yanling Ju, Dhruv Saxena, Tamar Kashti, Dror Kella, Doron Shaked, Mani Fischer, Robert Ulichney, Jan Allebach

Proceedings Volume 8292, 82920X (2012) https://doi.org/10.1117/12.912769

KEYWORDS: Printing, Halftones, Stochastic processes, Binary data, Analytical research, Electrophotography, Light scattering, Image resolution, Scanners, Statistical analysis

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Proceedings Article | 19 January 2010 Paper

Electro-photographic-model-based halftoning

Puneet Goyal, Madhur Gupta, Doron Shaked, Carl Staelin, Mani Fischer, Omri Shacham, Rodolfo Jodra, Jan Allebach

Proceedings Volume 7528, 752810 (2010) https://doi.org/10.1117/12.843968

KEYWORDS: Printing, Halftones, Stochastic processes, Binary data, Image filtering, Liquids, Digital imaging, Algorithm development, Image processing, Visual process modeling

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Proceedings Article | 28 January 2008 Paper

Laser print quality: practically continuous addressability

M. Fischer, D. Shaked, G. Amir, C. Breen, D. Kella

Proceedings Volume 6807, 680713 (2008) https://doi.org/10.1117/12.766351

KEYWORDS: Resolution enhancement technologies, Nonimpact printing, Printing, Image resolution, Visualization, Binary data, Modulation, Liquids, Image processing, Photography

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Proceedings Article | 29 January 2007 Paper

Interpolation for nonlinear Retinex-type algorithms

D. Shaked

Proceedings Volume 6493, 649312 (2007) https://doi.org/10.1117/12.704776

KEYWORDS: Nonlinear filtering, Filtering (signal processing), Linear filtering, Image resolution, Image filtering, Image analysis, Statistical analysis, Nonlinear optics, Image processing, Signal processing

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Proceedings Article | 16 January 2006 Paper

Frequency domain design of cluster dot screens

Mani Fischer, Doron Shaked

Proceedings Volume 6058, 60580U (2006) https://doi.org/10.1117/12.641903

KEYWORDS: Visualization, Printing, Halftones, Photography, Astatine, Convolution, Solids, Inspection, Image processing, Digital image processing

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Proceedings Article | 18 December 2003 Paper

G/M dither or color dither from monochrome dither matrices

Doron Shaked, Zachi Baharav, Qian Lin

Proceedings Volume 5293, (2003) https://doi.org/10.1117/12.526907

KEYWORDS: Halftones, RGB color model, Matrices, Stochastic processes, Solids, Visual system, Quality measurement, Color image processing, Diffusion, Visualization

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Proceedings Article | 30 May 2002 Paper

Variational famework for Retinex

Ron Kimmel, Michael Elad, Doron Shaked, Renato Keshet, Irwin Sobel

Proceedings Volume 4662, (2002) https://doi.org/10.1117/12.469539

KEYWORDS: Reflectivity, Reconstruction algorithms, RGB color model, Image processing, Convolution, Image resolution, Visual system, Linear filtering, Computer programming, Image analysis

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Proceedings Article | 21 December 1999 Paper

Dithering in color simplexes

Doron Shaked, Zachi Baharav, Nur Arad

Proceedings Volume 3963, (1999) https://doi.org/10.1117/12.373420

KEYWORDS: RGB color model, Halftones, Solids, Color printing, Visual system, Computing systems, Silicon, Visualization, Diffusion, Graphic arts

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Proceedings Article | 9 April 1999 Paper

Watermarking of dither halftoned images

Zachi Baharav, Doron Shaked

Proceedings Volume 3657, (1999) https://doi.org/10.1117/12.344681

KEYWORDS: Digital watermarking, Matrices, Printing, Image processing, Halftones, Statistical analysis, Visualization, Image quality, Security printing, Binary data

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Proceedings Article | 22 December 1998 Paper

Color diffusion: error diffusion for color halftones

Doron Shaked, Nur Arad, Andrew Fitzhugh, Irwin Sobel

Proceedings Volume 3648, (1998) https://doi.org/10.1117/12.334589

KEYWORDS: Halftones, Diffusion, RGB color model, Solids, Visualization, Visual system, Quantization, Color difference, Human vision and color perception, Binary data

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Proceedings Article | 4 January 1995 Paper

Skeletonization via distance maps and level sets

Ron Kimmel, Doron Shaked, Nahum Kiryati, Alfred Bruckstein

Proceedings Volume 2356, (1995) https://doi.org/10.1117/12.198602

KEYWORDS: Image segmentation, Vision geometry, Shape analysis, Wave propagation, Wavefronts, Binary data, Electrical engineering, Visual process modeling, Distance measurement, Computer science

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Showing 5 of 16 publications

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