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Primerjava vrednotenja barvnih razlik lesnih premazov s kolorimetrom in z vizualnim zaznavanjem : diplomski projekt
ID Demšar, Boris (Author), ID Petrič, Marko (Mentor) More about this mentor... This link opens in a new window, ID Pavlič, Matjaž (Comentor), ID Kitek Kuzman, Manja (Reviewer)

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Abstract
Ugotavljali smo razlike med občutljivostjo vizualnega zaznavanja barvnih razlik in numeričnega vrednotenja, na barvno različnih vzorcih. Pripravili smo 12 različnih parov površinskih sistemov- en vzorec od vsakega para smo shranili, drugega pa obsevali z UV svetlobo, da bi povečali razliko med barvama obeh vzorcev v paru. Vzorci so se med seboj razlikovali po vrsti in namembnosti podlage, premaznem sistemu, teksturi podlage ter dimenziji. Po vsakem obsevanju z UV svetlobo smo med seboj primerjali barvi vzorcev posameznega para. Anketirali smo vedno isti letnik študentov- ti so na anketnih lističih označili, kolikšna je barvna razlika, če je le-ta opazna. Po vsakem obsevanju pa smo barvo izmerili tudi s kolorimetrom, ter nato izračunali barvne razlike. Večinoma so anketiranci zaznali razliko barve le v primerih, ko je numerično vrednotena razlika barve %E* imela vrednosti v območju med 0,5 in 1,0. V nekaterih primerih so anketiranci spremembo barve komaj zaznali šele pri vrednostih %E* nad 3,0. To kaže, da sta zmožnost čutnega zaznavanja barvnih razlik in s kolorimetrom izmerjenih vrednosti %E* med seboj le šibko povezani, saj na čutno zaznavo barvne razlike vplivajo različne lastnosti površine, kot sta npr. sijaj in tekstura

Language:Slovenian
Keywords:lesni premazi, UV obsevanje, barvna razlika, vizualno zaznavanje, numerično vrednotenje
Work type:Diploma project paper
Typology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Place of publishing:Ljubljana
Publisher:[B. Demšar]
Year:2015
Number of pages:VIII, 39 f.
PID:20.500.12556/RUL-117700 This link opens in a new window
UDC:674.07
COBISS.SI-ID:2457225 This link opens in a new window
Publication date in RUL:22.07.2020
Views:8005
Downloads:99
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Secondary language

Language:English
Title:Comparison of evaluation colour differences of wood coatings with colorimeter and visual perception
Abstract:
We evaluated distinctions between visual perception of colour differences and numerically determined colour differences in terms of the CIELAB %E* values.12 pairs of different surface system samples were prepared; a sample of each pair was kept in a dark, dry place and the other one exposed to UV light to increase the difference between colours of both samples in a pair. The samples varied in texture, dimensions, coating, substrate type and application purpose. A class of students evaluated colour differences after every exposure to UV light. The colours of all the samples were measured also with a colorimeter. In general, the respondents noticed the colour difference at the values of %E* between 0.5 and 1.0. However, in some cases, the respondents only hardly noticed the colour difference at the %E* values even above 3.0. This indicates that the ability of visual perception of a colour difference and the %E* value determined with a colorimeter, are only weakly related. This is probably because the visual perception of difference between colours is influenced by various surface properties like ,for instance, gloss and texture

Keywords:wood coatings, UV light, colour difference, visual perception, numerical determination

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