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Kruse, Björn
Publications (10 of 26) Show all publications
Gooran, S. & Kruse, B. (2015). High-speed first- and second-order frequency modulated halftoning. Journal of Electronic Imaging (JEI), 24(2)
Open this publication in new window or tab >>High-speed first- and second-order frequency modulated halftoning
2015 (English)In: Journal of Electronic Imaging (JEI), ISSN 1017-9909, E-ISSN 1560-229X, Vol. 24, no 2Article in journal (Refereed) Published
Abstract [en]

Halftoning is a crucial part of image reproduction in print. First-order FM halftones, in which the single dots are stochastically distributed, is widely used in printing technologies, such as inkjet, that are able to stably print isolated dispersed dots. Printers, such as laser printers, that utilize electrophotographic technology are not able to stably print the isolated dots and therefore use clustered-dot halftones. Periodic clustered-dot, i.e. AM, halftones are commonly used in this type of printers but they suffer from undesired periodic interference pattern called moiré. An alternative solution is to use second-order FM halftones in which the clustered dots are stochastically distributed. The iterative halftoning techniques, that usually result in well-formed halftones, are operating on the whole input image and require extensive computations and thereby are very slow when the input image is large. In this paper, we introduce a method to generate image independent threshold matrices for first and second-order FM halftoning. The first-order threshold matrix generates well-formed halftone patterns and the second-order FM threshold matrix can be adjusted to produce clustered-dots of different size, shape and alignment. Using predetermined and image independent threshold matrices makes the proposed halftoning method a point-by-point process and thereby very fast.

Place, publisher, year, edition, pages
Society of Photo-optical Instrumentation Engineers (SPIE), 2015
National Category
Media Engineering
Identifiers
urn:nbn:se:liu:diva-115791 (URN)10.1117/1.JEI.24.2.023016 (DOI)000354873600016 ()
Available from: 2015-03-19 Created: 2015-03-19 Last updated: 2017-12-04
Qu, Y. Y., Nyström, D. & Kruse, B. (2011). A New Approach to Estimate the 3-D Surface of Paper. In: Proceedings of the 63rd Technical Association of the GraphicArts, (TAGA), Pittsburgh, USA: . Paper presented at 63rd Annual Technical TAGA Conference, March 6–9, Pittsburgh, USA (pp. 321-339).
Open this publication in new window or tab >>A New Approach to Estimate the 3-D Surface of Paper
2011 (English)In: Proceedings of the 63rd Technical Association of the GraphicArts, (TAGA), Pittsburgh, USA, 2011, p. 321-339Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

This paper describes a method for 3-D surface estimation based on reflection measurements in different orientationsof the light source and the paper. To facilitate the estimation, surface facets that probably support specular reflection weremarked and isolated, so as to enable the application of sample Lambertian reflectance model over those non-specular reflectionpoints. A computer controlled imaging device was used to capture images in a large number of orientations. The image capturewas performed using several different exposures in order to present larger dynamic irradiance range. Images together with theircounterpoints under antithetical illuminations were used to deal with the possible situation that light failed illumination arrivalson some points locate behind bulges.Iteration using difference approximation as well as enforcing integrability algorithm wereused to calculate the surface height based on Shaping from Shading algorithm.

Keywords
Paper, Surface, 3D, Shape, Gloss
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-76846 (URN)978-1-935185-03-1 (ISBN)
Conference
63rd Annual Technical TAGA Conference, March 6–9, Pittsburgh, USA
Available from: 2012-06-13 Created: 2012-04-20 Last updated: 2013-09-17Bibliographically approved
Kruse, B. (2010). The Characterization of Gloss from detailed Semi Goniometric Measurements. In: Alexandra Pekarovicova, TAGA (Ed.), Proc. TAGA (Technical Association of the Graphic Arts): . Paper presented at TAGA (Technical Association of the Graphic Arts), March 2010, San Diego, California, USA (pp. 1-7). Sewickley, PA, USA: Technical Association of the Graphic Arts
Open this publication in new window or tab >>The Characterization of Gloss from detailed Semi Goniometric Measurements
2010 (English)In: Proc. TAGA (Technical Association of the Graphic Arts) / [ed] Alexandra Pekarovicova, TAGA, Sewickley, PA, USA: Technical Association of the Graphic Arts , 2010, p. 1-7Conference paper, Published paper (Other academic)
Abstract [en]

Gloss has a profound impact on the quality of printed matter. The manufacturing of the substrate and the printing process result in varying amount of gloss from the print. A glossy print with a smooth surface give a high degree of reflection in a relatively narrow specular sector. This contributes to the observed density range and is usually regarded as beneficial from a qualitative perspective. On surfaces that are less smooth, such as newsprint, the print quality is very dependent on the way gloss is angularly distributed. From the measurements it is clearly seen that gloss can be observed at different scales. The fibers themselves as well as the filler and surface material reflect with different characteristics.

This paper is based on 360 degree angular measurements with a geometry of 60 degree illumination and zero degree detector. The specimen is placed in the instrument on a moving stage. Mechanically moving the specimen relative to the light source and digitally restoring the geometry create an impression of a moving light-source. In this paper we will focus on the gloss measured on a very detailed level (micrometers) as points of high reflection.

Place, publisher, year, edition, pages
Sewickley, PA, USA: Technical Association of the Graphic Arts, 2010
Series
TAGA Proceedings, ISSN 0082-2299
Keywords
Gloss, Surface Properties, Print Quality, Reproduction
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:liu:diva-62965 (URN)
Conference
TAGA (Technical Association of the Graphic Arts), March 2010, San Diego, California, USA
Available from: 2010-12-08 Created: 2010-12-08 Last updated: 2013-10-30Bibliographically approved
Kruse, B. (2008). Simulation Experiments in Turbid Media - The Effect of In-homogeneous Layers. In: TAGA 2008 proceedings: . Paper presented at TAGA, 60th annual technical conference, San Francisco, California, USA, March 16-19, 2008 (pp. 10-26). Sewickley PA, USA: TAGA - Technical Association of the Graphic Arts
Open this publication in new window or tab >>Simulation Experiments in Turbid Media - The Effect of In-homogeneous Layers
2008 (English)In: TAGA 2008 proceedings, Sewickley PA, USA: TAGA - Technical Association of the Graphic Arts , 2008, p. 10-26Conference paper, Published paper (Other academic)
Abstract [en]

The optical property of the substrate governs the reproduction characteristics and quality of printed paper. Paper is a very complex substrate that is designed for different application areas. In the simplest case it is a one-layer structure of fibers. In more complex structures the substrate may be build from several layers with different properties. In both situations it is vital to be able to control the manufacturing in order to achieve the desired product. This paper deals with simulation of differently composed structures that is difficult to accomplish in complex cases that goes beyond the Kubelka-Munk original theory. The paper describes qualitative results concerning the reproduction due to inhomogeneities in the layers themselves and the layer structures. More specifically we will study two simple structures, a one-layer substrate with inclusions ( for example recycled paper) and a two-layer substrate in which the coating layer thickness varies. In the second example the optical properties for the coating layer are supposed to be different from the base. The qualitative results show the degradations that can be expected due to inhomogeneities. The simulations will also allow for computation of the tone value increase in the simulated instances.

Place, publisher, year, edition, pages
Sewickley PA, USA: TAGA - Technical Association of the Graphic Arts, 2008
Series
TAGA Proceedings, ISSN 0082-2299
Keywords
Turbid Media, Optical Properties
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-44679 (URN)77272 (Local ID)978-1-935185-00-0 (ISBN)77272 (Archive number)77272 (OAI)
Conference
TAGA, 60th annual technical conference, San Francisco, California, USA, March 16-19, 2008
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-11-05
Nyström, D., Kruse, B. & Yang, L. (2007). A Micro-scale study of optical dot gain in color halftone. In: N. Enlund & M. Lovrecek (Ed.), Advances in Printing and Media Technology, Vol. 34: iarigai. Paper presented at The 34:th International Research Conference of iarigai, Grenoble, 2007 (pp. 171-179). Zagreb: Acta Graphic Publishers
Open this publication in new window or tab >>A Micro-scale study of optical dot gain in color halftone
2007 (English)In: Advances in Printing and Media Technology, Vol. 34: iarigai / [ed] N. Enlund & M. Lovrecek, Zagreb: Acta Graphic Publishers , 2007, p. 171-179Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Zagreb: Acta Graphic Publishers, 2007
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-42656 (URN)67700 (Local ID)978-953-7292-04-1 (ISBN)67700 (Archive number)67700 (OAI)
Conference
The 34:th International Research Conference of iarigai, Grenoble, 2007
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2012-05-23
Nyström, D. & Kruse, B. (2007). Colorimetric Device Characterization for Accurate Color Image Acquisition. In: N. Enlund (Ed.), Advances in Printing and Media Technology, Vol. 36: iarigai. Paper presented at The 33:rd International Research Conference of iarigai, Leipzig, 2006 (pp. 349-360). Zagreb: Acta Graphic Publishers
Open this publication in new window or tab >>Colorimetric Device Characterization for Accurate Color Image Acquisition
2007 (English)In: Advances in Printing and Media Technology, Vol. 36: iarigai / [ed] N. Enlund, Zagreb: Acta Graphic Publishers , 2007, p. 349-360Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Zagreb: Acta Graphic Publishers, 2007
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-40822 (URN)54234 (Local ID)978-953-7292-03-4 (ISBN)54234 (Archive number)54234 (OAI)
Conference
The 33:rd International Research Conference of iarigai, Leipzig, 2006
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2012-05-23
Yang, L., Fogden, A., Pauler, N., Saevborg, O. & Kruse, B. (2006). Studying ink penetration with microscopic and spectroscopic techniques. Journal of Imaging Science and Technology, 50(4), 327-332
Open this publication in new window or tab >>Studying ink penetration with microscopic and spectroscopic techniques
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2006 (English)In: Journal of Imaging Science and Technology, ISSN 1062-3701, E-ISSN 1943-3522, Vol. 50, no 4, p. 327-332Article in journal (Refereed) Published
Abstract [en]

Distribution of ink jet ink in paper substrates and the consequences of ink penetration for printing color reproduction have been studied by combining microscopic image processing with spectroscopic analysis. The study focused on the effects of the composition of uncoated paper, for five laboratory papers plus two commercial products, all consisting of similar pulps but with different combinations of additives. In particular, it was observed that hydrophobizing internal size agents significantly reduced ink penetration, while their effect on paper optical properties was negligible. This observation thus made it possible to study experimentally the pure effects of ink penetration. Pairwise comparisons of prints on such laboratory papers with identical optical properties revealed remarkable impacts of ink penetration on optical density, causing color saturation reduction and color shift. These experimental observations confirmed the theoretical predictions.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-53490 (URN)10.2352/J.ImagingSci.Technol.(2006)50:4(327) (DOI)
Available from: 2010-01-25 Created: 2010-01-25 Last updated: 2017-12-12
Johansson, L. & Kruse, B. (2005). A Colour Separation Strategy for Reproduction of Printed Dynamic Images on Paper Substrate. In: iarigai Research Conference,2005 (pp. 191). Zagreb: Iarigai
Open this publication in new window or tab >>A Colour Separation Strategy for Reproduction of Printed Dynamic Images on Paper Substrate
2005 (English)In: iarigai Research Conference,2005, Zagreb: Iarigai , 2005, p. 191-Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Zagreb: Iarigai, 2005
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-32273 (URN)18161 (Local ID)18161 (Archive number)18161 (OAI)
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2010-12-02
Gooran, S. & Kruse, B. (2005). A novel bi-level halftoning technique based on multi-level halftoning. In: Proceedings of the Beijing Internaltional Conference on Imaging 2005,2005 (pp. 122). New York, US: Science Press
Open this publication in new window or tab >>A novel bi-level halftoning technique based on multi-level halftoning
2005 (English)In: Proceedings of the Beijing Internaltional Conference on Imaging 2005,2005, New York, US: Science Press , 2005, p. 122-Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
New York, US: Science Press, 2005
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-28749 (URN)13924 (Local ID)13924 (Archive number)13924 (OAI)
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2010-12-02
Yang, L., Fogden, A., Pauler, N., Sävborg, Ö. & Kruse, B. (2005). A novel method for studying ink penetration of a print. Nordic Pulp & Paper Research Journal, 20(4), 423-429
Open this publication in new window or tab >>A novel method for studying ink penetration of a print
Show others...
2005 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 20, no 4, p. 423-429Article in journal (Refereed) Published
Abstract [en]

A method combining microscopy with image analysis for studying ink penetration of ink-jet prints has been proposed. Prints on paper substrates of various material compositions have been microtomed, imaged with optical microscopy, and analyzed with image processing. The penetration depth and distribution of the ink-jet dye in the paper, which depend on the material compositions of the substrates and printed ink volumes, are then obtained by means of statistical analysis. The study focuses on uncoated fine papers, including five types of hand-sheets and two commercial papers. It is observed that ink penetration can be significantly reduced by adding internal sizing (hydrophobizing) chemicals in the hand-sheet making, while it is relatively less affected by addition of filler and fluorescent whitening agent (FWA). Ink volume obviously influences the depth of its penetration, with depth increasing linearly for higher ink volumes but displaying a disproportionately shallow penetration for smaller applied volumes.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-32272 (URN)18160 (Local ID)18160 (Archive number)18160 (OAI)
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2017-12-13
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