نتایج جستجو برای: cielab

تعداد نتایج: 717  

1996
János Schanda

CIE colorimetry was standardised 65 years ago to describe colorimetric properties of signal lights. The first real application of CIE colorimetry occurred, however, in the textile and coating industries to describe colour matches between sample and reference. Thus also the experiments conducted to achieve a uniform colour scale diagram were performed by using material samples usually illuminate...

2017

Color is one of the most effective visual variabks since it can be combined with other mappings and encode ilifonnation without using any adtational space on the display. An important exampk when expnssing additional visutJJ dimensions is dinly neetkd is the analysis of high-dimensionJJl dtlta. The property of perceptual linearity is tksirabk in this applicatio1t, because the user intu:itively ...

2011
Mark S. Drew Hamid Reza Vaezi Joze

Correlated colour temperature (CCT) provides a simple and useful descriptor for a given spectral power distribution as well as an approximation of the full spectrum of the measured illuminant. But typically the CCT is calculated on the basis of distance in the chromaticity plane. Here we suggest that, while familiar, this metric is not the most effective for actually generating a useful spectra...

Journal: :The journal of contemporary dental practice 2013
Osman Tolga Harorli Çagatay Barutcigil Yusuf Ziya Bayindir Funda Bayindir

AIMS Tooth colored dental restorative materials should maintain their chromatic properties throughout their service period. The aim of this study was to examine the possible color changes of flowable resin composite filling materials following water storage. The effect of additional light curing on color stability of restorative materials was also investigated. MATERIALS AND METHODS Six brand...

Journal: :Applied optics 2010
Luis J Herrera Rosa Pulgar Janiley Santana Juan C Cardona Alberto Guillén Ignacio Rojas María del Mar Pérez

Tooth bleaching is becoming increasingly popular among patients and dentists since it is a relatively noninvasive approach for whitening and lightening teeth. Instruments and visual assessment with respect to commercial shade guides are currently used to evaluate tooth color. However, the association between these procedures is imprecise and the degree of color change after tooth bleaching is k...

2014

Abstract—The objectives of this research are to produce prototype coconut oil based solvent offset printing inks and to analyze a basic quality of printing work derived from coconut oil based solvent offset printing inks, by mean of bringing coconut oil for producing varnish and bringing such varnish to produce black offset printing inks. Then, analysis of qualities i.e. CIELAB value, density v...

2015
Haoxue LIU Min HUANG Guihua CUI M. Ronnier LUO Manuel MELGOSA

A psychophysical experiment has been conducted to test the threshold of color difference in displayed images under different viewing conditions. Four ISO SCID 400 images N2, N3, N5 and N7 were used as test images, whose colors were altered in lightness, chroma and hue attributes systematically to form the test image pairs with the original ones. The average color difference in all image pairs r...

Journal: :Journal of neuroscience methods 2013
Nicolas Rothen Anil K Seth Christoph Witzel Jamie Ward

The most commonly used method for formally assessing grapheme-colour synaesthesia (i.e., experiencing colours in response to letter and/or number stimuli) involves selecting colours from a large colour palette on several occasions and measuring consistency of the colours selected. However, the ability to diagnose synaesthesia using this method depends on several factors that have not been direc...

Journal: :Lasers in surgery and medicine 2005
Chang-Seok Kim Moon Ki Kim Byungjo Jung Bernard Choi Wim Verkruysse Myung-Yung Jeong J Stuart Nelson

BACKGROUND AND OBJECTIVE A cross-polarized diffuse reflectance (CDR) color imaging system was developed for quantitative evaluation of port wine stain (PWS) response to laser therapy. To obtain calibrated Commission International de l'Eclairage (CIE) color space images from RGB (red, green, and blue) images, it was necessary to derive an optimized conversion matrix specific to our imaging syste...

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