Results 271 to 280 of about 2,206,810 (325)
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A fast parallel algorithm to color a graph with Δ colors
Journal of Algorithms, 1988Summary: An NC algorithm for the \(\Delta\) vertex coloring problem is given. The polynomial algorithm implied by Brooks' theorem seems to be highly sequential. To exploit the power of parallel processing we introduce a novel partition of the graph which may find applications elsewhere.
Mauricio Karchmer, Joseph Naor
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Journal of the Textile Institute, 2011 This study examines the effect of the particle size of fluorocarbon-based water-oil-soil-repellent finishing agents on color fastness and colorimetric properties by experimental analyses. Therefore, two finishing agents with different particle sizes were
Nihat ÇELİK, Halil İbrahim İçoğlu
exaly +2 more sources
Journal of Natural Fibers, 2017 Eleven natural pigments were selected for the production of environment-friendly cotton prints. Physicochemical properties pH, conductivity, viscosity of the printing pastes were measured in order to evaluate their stability and suitability for printing.
Nikolaos Nikolaidis
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A Fast Algorithm for Color Image Segmentation
First International Conference on Innovative Computing, Information and Control - Volume I (ICICIC'06), 2006Based on K-means and a two-layer pyramid structure, a fast algorithm is proposed for color image segmentation. The algorithm employs two strategies. Firstly, a two-layer structure of a color image is established. Then, an improved K-means with integer based lookup table implementation is applied to each layer.
Liju Dong +5 more
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Fast and adaptive color-to-grayscale conversion
ACM SIGGRAPH 2006 Sketches on - SIGGRAPH '06, 2006Methods and systems, including computer program products, for determining a plurality of color clusters based on a plurality of pixels associated with a color image, the clusters being fewer than the pixels. A grayscale value for each one of a plurality of points in a color space is determined.
Mark A. Ruzon +3 more
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cFAST: A fast color feature detector
2015 International Conference on Image Processing Theory, Tools and Applications (IPTA), 2015By extending the basic idea of FAST it is possible to create a detector that can operate directly on a RGB color image and on it detect a higher number of features. The higher number of points and the simplification of the metric put us in the position to impose an additional condition on the keypoints.
C. Robert Pech, Jens Vial, Andreas Zell
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Fast color image restoration with multisensors
International Journal of Imaging Systems and Technology, 2002AbstractIn this article, we consider restoring a single‐color image from two degraded frames of the same scene by a RGB sensor and a luminance sensor. The RGB‐to‐YIQ transformation, the classical Tikhonov regularization and the Neumann boundary condition are used in the restoration process.
Michael K. Ng 0001, Nirmal K. Bose
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Fast implementation of color constancy algorithms
SPIE Proceedings, 2009Color constancy is a feature of the human color perception system which ensures that the perceived color of objects remains relatively constant under varying illumination conditions, and therefore closer to the physical reflectance. This perceptual effect, discovered by Helmholtz, was formalized by Land and McCann in 1971, who formulated the Retinex
Jean-Michel Morel +2 more
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A fast parallel coloring of planar graphs with five colors
Information Processing Letters, 1987Abstract We have shown that coloring a planar graph with five colors is in complexity class NC. The crux of the algorithm is our ability to find a large set of independent vertices and change the colors of their neighbors so that each independent vertex can color itself. This improves the result of [2] which colors a planar graph with eight colors. A
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Journal of Natural Fibers, 2020
Natural dyestuffs are evaluated as innovative natural sources to color the fabric and give antibacterial properties in the textile industry. In this study, methanol extracts of Helichrysum arenarium subsp.
Mustafa Cuce +4 more
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Natural dyestuffs are evaluated as innovative natural sources to color the fabric and give antibacterial properties in the textile industry. In this study, methanol extracts of Helichrysum arenarium subsp.
Mustafa Cuce +4 more
semanticscholar +1 more source