Results 151 to 160 of about 404 (182)
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Robust estimation of print mottle
Proceedings of SPIE, 2008Mottle is a common defect in printing. Mottle evaluation is crucial in image quality assessment and system diagnosis. In this paper, we present a new automatic mottle estimation method which improves the existing technologies in two aspects. First, a modified mottle noise frequency range is proposed, which further separates the banding and streak ...
Wencheng Wu, Edul N Dalal
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On the analysis of wavelet-based approaches for print mottle artifacts
Proceedings of SPIE, 2014Print mottle is one of several attributes described in ISO/IEC DTS 24790, a draft technical specification for the measurement of image quality for monochrome printed output. It defines mottle as aperiodic fluctuations of lightness less than about 0.4 cycles per millimeter, a definition inherited from the latest official standard on printed image ...
Ahmed H Eid, Brian E Cooper
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Characterization of mottle and low-frequency print defects
Proceedings of SPIE, 2008In this paper, we propose new techniques for detecting and quantifying print defects. In our previous work, we introduced a scanner-based print quality system to characterize directional print defects, such as banding, jitter, and streaking. We extend our previous print quality work two ways.
Ahmed H Eid
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The influence of heat treatment on print mottle of screen printed textile knitted fabrics
Applied Thermal Engineering, 2015Printed fabric is widely used, and it is exposed to various influences. One unavoidable impact is heat treatment during subsequent maintenance e ironing. Hence, many printed textile materials are exposed to different temperatures. Textile can be printed with conventional (screen) and digital (Inkjet) print technologies.
Mladen Stancic +2 more
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Impact of non-uniform water absorption on water-interference print mottle in offset printing
Nordic Pulp and Paper Research Journal, 2018AbstractPrint mottle is a serious and yet common print defect in offset printing. An imbalance between the feed of fountain solution and the ability of the paper substrate to absorb and transport this water away from the surface can cause moisture/water interference problems.
Göran Strom
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The Influence of Mean Reflectance on Perceived Print Mottle
Journal of Imaging Science and Technology, 2003Carl-Magnus Fahlcrantz +2 more
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Comparison of print mottle and surface topography testing methods
Nordic Pulp and Paper Research Journal, 2013Miroslava Kasajová, Juraj Gigac
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Automatic Multi-resolution Spatio-Frequency Analysis for Print Mottle Evaluation
Color and Imaging Conference, 2009Siddharth Khullar +5 more
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On estimation of perceived mottling prior to printing
SPIE Proceedings, 2008Print mottle is one of the most significant defects in modern offset printing influencing overall print quality. Mottling can be defined as undesired unevenness in perceived print density. Previous research in the field considered designing and improving perception models for evaluating print mottle.
Albert Sadovnikov +2 more
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Comparative study of different methods for the assessment of print mottle
Color Research & Application, 2015AbstractPrint mottle is a print defect that occurs more or less on prints and has a negative influence on the evenness in print. Several methods to assess print mottle have been proposed. In this article, we analyzed three methods for print mottle evaluation: Histogram Mottle Macro, Gray level co‐occurrence matrix (GLCM) and M‐score.
Ivana Jurič +3 more
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