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Colour management of a low-cost four-colour ink-jet printing system on textiles / Yuqian Zhang in COLORATION TECHNOLOGY, Vol. 125, N° 1 (2009)
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Titre : Colour management of a low-cost four-colour ink-jet printing system on textiles Type de document : texte imprimé Auteurs : Yuqian Zhang, Auteur ; Vien Cheung, Auteur ; Stephen Westland, Auteur ; Katherine J. Beverley, Auteur Année de publication : 2009 Article en page(s) : p. 29-35 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : A low-cost four-colour (RBYK) dye-based ink-jet printing system for textiles was introduced in this study, in which red and blue inks were employed instead of the magenta and cyan inks used in half-tone printing. The basis of a colour-management system for this device was developed by determining the mapping between XYZ tristimulus values of output colours and the digital RBYK values using polynomial transforms. A second-order equation was found to give the best performance with an average characterisation error of under 7 CIELAB units. DOI : 10.1111/j.1478-4408.2008.00172.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2008.00172.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4822
in COLORATION TECHNOLOGY > Vol. 125, N° 1 (2009) . - p. 29-35[article]Réservation
Réserver ce documentA custom ink-jet printing system using a novel pretreatment method / Yuqian Zhang in COLORATION TECHNOLOGY, Vol. 125, N° 6 (2009)
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Titre : A custom ink-jet printing system using a novel pretreatment method Type de document : texte imprimé Auteurs : Yuqian Zhang, Auteur ; Stephen Westland, Auteur ; Vien Cheung, Auteur ; Stephen M. Burkinshaw, Auteur ; Richard S. Blackburn, Auteur Année de publication : 2010 Article en page(s) : p. 357-364 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : A low-cost and environmental-friendly direct dye-based ink-jet printing system was developed. A novel ink-jet pretreatment method was employed, in which the cationic fixing agent, Matexil FC-ER, was applied as the colourless fixing ink and applied only on image areas of the fabric by ink-jet printer. It was found that this new pretreatment method could more effectively enhance the colour strength and improve the wash fastness (greyscale ≥ 3) when compared with traditional exhaust application. The cross-staining of non-image areas of fabric was also apparently decreased using this new method. The light fastness of ink-jet pretreated samples was slightly reduced as the presence of Matexil FC-ER made dyes more sensitive to light. DOI : 10.1111/j.1478-4408.2009.00218.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2009.00218.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7626
in COLORATION TECHNOLOGY > Vol. 125, N° 6 (2009) . - p. 357-364[article]Réservation
Réserver ce documentDifferent transformation methods between CIELAB coordinates and Munsell hue / Forough Mahyar in COLORATION TECHNOLOGY, Vol. 126, N° 1 (2010)
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Titre : Different transformation methods between CIELAB coordinates and Munsell hue Type de document : texte imprimé Auteurs : Forough Mahyar, Auteur ; Stephen Westland, Auteur ; Vien Cheung, Auteur Année de publication : 2010 Article en page(s) : p. 31-36 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : This research aims to convert CIE L*C*abhab coordinates into corresponding Munsell hues. Different transformation methods for colour mapping from CIELAB colour space to Munsell hues are proposed. Polynomial equations that predict Munsell hue from CIELAB hab suffer from poor performance as there is no direct one-to-one mapping. Polynomial methods that predict Munsell hue from all three L*C*abhab values also show limited performance. However, a distance-weighted look-up-table model based upon the CIEDE2000 colour-difference equation is able to predict Munsell hue to an accuracy of 1 unit of root mean square error. All transformation methods in this paper were developed using CIE illuminant C and the 2° standard observer conditions and were based on 2729 Munsell renotation colour samples. DOI : 10.1111/j.1478-4408.2010.00224.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00224.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8415
in COLORATION TECHNOLOGY > Vol. 126, N° 1 (2010) . - p. 31-36[article]Réservation
Réserver ce documentMethods for designing characterisation targets for digital cameras / Yi-Fan Chou in COLORATION TECHNOLOGY, Vol. 129, N° 3 (06/2013)
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Titre : Methods for designing characterisation targets for digital cameras Type de document : texte imprimé Auteurs : Yi-Fan Chou, Auteur ; Ming Ronnier Luo, Auteur ; Changjun Li, Auteur ; Vien Cheung, Auteur ; San-Liang Lee, Auteur Année de publication : 2013 Article en page(s) : p. 203-213 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Appareils photographiques numériques
Calcul
Caractérisation
vision des couleursIndex. décimale : 778.6 Photographie en couleur Résumé : Characterisation targets usually include a set of physical coloured samples. A characterisation model can be derived between the colorimetric values (tristimulus values) and camera responses (RGB values) taken from an imaging device such as a digital camera capturing the colours in the target. The performance of such a model is highly dependent upon the number of colours and the colour region in the characterisation target. An ideal characterisation target should provide accurate model prediction without requiring too many samples. In this paper, a computational method is presented for colour selections to train a camera characterisation model based on a fourth-order polynomial model including 35 terms. Compared with other available methods, the newly developed method performed better. It is proposed that this method be applied to generate generic targets in terms of colorimetric values. These targets should work reasonably well for a wide range of materials. Note de contenu : - CAMERA CHARACTERISATION MODEL
- COLOUR SELECTIONS FOR THE TRAINING TARGET : Hardeberg method - MAXMINC method - The colour difference iteration (CDI) method
- DATA COLLECTION : Munsell book of color - Professional colour communicator - GretagMacbeth ColorChecker DC - Nikon D80 digital camera - GretagMacbeth COLOR-EYE 7000A spectrophotometer
- COMPARISON OF COLOUR SELECTION METHODS
- COLOUR SELECTION GUIDELINE FOR CHARACTERISING DIGITAL CAMERAS
- DEVELOPMENT OF GENERIC CHARACTERISATION TARGETS BASED ON COLORIMETRIC VALUES : Approach 1 : averaged CDI - Approach 2 : grid CDIDOI : 10.1111/cote.12022 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12022/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18494
in COLORATION TECHNOLOGY > Vol. 129, N° 3 (06/2013) . - p. 203-213[article]Réservation
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