A colour assessment methodology for oak wood
Identifieur interne : 000032 ( PascalFrancis/Checkpoint ); précédent : 000031; suivant : 000033A colour assessment methodology for oak wood
Auteurs : Nele Defoirdt [Belgique] ; Inge Wuijtens [Belgique] ; Lieven De Boever [Belgique] ; Hugo Coppens [Belgique] ; Jan Van Den Bulcke [Belgique] ; Joris Van Acker [Belgique]Source :
- Annals of forest science : (Print) [ 1286-4560 ] ; 2012.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Context Customers have limited tolerances for colour differences between oak wood elements in parquetry or furniture, whereas manufacturers are in need of an objective method to communicate possible differences in their products. • Aims This study is aimed at grading oak wood boards in objectively defined colour classes in correspondence with the visual assessment by an expert panel. • Methods First, the most suitable spectrophotometer for measurements approximating the perception of the human eye was selected. Then, three colour grading algorithms were evaluated: one based on the smallest distance towards the centre of the colour subspaces, the second using a classification tree and the last implementing the CIEDE2000 colour difference formula to determine tolerance ellipsoids. • Results Statistical analysis using a classification tree and CIEDE2000 tolerance ellipsoids classified the specimens in good accordance with visual assessment, with a 6 and 5 % misclassification, respectively. • Conclusions The colour grading methodology can be adapted to particular grading purposes and is proposed as a basis for development of an inline colour grading system to be added to commonly used defect detection scanners.
Affiliations:
- Belgique
- Province de Flandre-Orientale, Vienne (Autriche)
- Gand, Vienne (Autriche)
- Université de Gand
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type="abstract" xml:lang="en">Context Customers have limited tolerances for colour differences between oak wood elements in parquetry or furniture, whereas manufacturers are in need of an objective method to communicate possible differences in their products. • Aims This study is aimed at grading oak wood boards in objectively defined colour classes in correspondence with the visual assessment by an expert panel. • Methods First, the most suitable spectrophotometer for measurements approximating the perception of the human eye was selected. Then, three colour grading algorithms were evaluated: one based on the smallest distance towards the centre of the colour subspaces, the second using a classification tree and the last implementing the CIEDE2000 colour difference formula to determine tolerance ellipsoids. • Results Statistical analysis using a classification tree and CIEDE2000 tolerance ellipsoids classified the specimens in good accordance with visual assessment, with a 6 and 5 % misclassification, respectively. • Conclusions The colour grading methodology can be adapted to particular grading purposes and is proposed as a basis for development of an inline colour grading system to be added to commonly used defect detection scanners.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>1286-4560</s0></fA01><fA03 i2="1"><s0>Ann. for. sci. : (Print)</s0></fA03><fA05><s2>69</s2></fA05><fA06><s2>8</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>A colour assessment methodology for oak wood</s1></fA08><fA11 i1="01" i2="1"><s1>DEFOIRDT (Nele)</s1></fA11><fA11 i1="02" i2="1"><s1>WUIJTENS (Inge)</s1></fA11><fA11 i1="03" i2="1"><s1>DE BOEVER (Lieven)</s1></fA11><fA11 i1="04" i2="1"><s1>COPPENS (Hugo)</s1></fA11><fA11 i1="05" i2="1"><s1>VAN DEN BULCKE (Jan)</s1></fA11><fA11 i1="06" i2="1"><s1>VAN ACKER (Joris)</s1></fA11><fA14 i1="01"><s1>Laboratory of Wood Technology, Department of Forest and Water Management, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653</s1><s2>9000 Ghent</s2><s3>BEL</s3><sZ>1 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></fA14><fA14 i1="02"><s1>CTIB-TCHN (The Belgian Institute for Wood Technology), Allée Hof ter Vleest 3</s1><s2>1070 Brussels</s2><s3>BEL</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA20><s1>939-946</s1></fA20><fA21><s1>2012</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>959</s2><s5>354000509013300090</s5></fA43><fA44><s0>0000</s0><s1>© 2014 INIST-CNRS. 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Then, three colour grading algorithms were evaluated: one based on the smallest distance towards the centre of the colour subspaces, the second using a classification tree and the last implementing the CIEDE2000 colour difference formula to determine tolerance ellipsoids. • Results Statistical analysis using a classification tree and CIEDE2000 tolerance ellipsoids classified the specimens in good accordance with visual assessment, with a 6 and 5 % misclassification, respectively. • Conclusions The colour grading methodology can be adapted to particular grading purposes and is proposed as a basis for development of an inline colour grading system to be added to commonly used defect detection scanners.</s0></fC01><fC02 i1="01" i2="X"><s0>002A33</s0></fC02><fC03 i1="01" i2="X" l="FRE"><s0>Couleur</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="ENG"><s0>Color</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="SPA"><s0>Color</s0><s5>01</s5></fC03><fC03 i1="02" i2="X" l="FRE"><s0>Bois feuillu</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="ENG"><s0>Hardwood</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="SPA"><s0>Madera de frondosas</s0><s5>02</s5></fC03><fC03 i1="03" i2="X" l="FRE"><s0>Colorimétrie</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="ENG"><s0>Colorimetry</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="SPA"><s0>Colorimetría</s0><s5>03</s5></fC03><fC03 i1="04" i2="X" l="FRE"><s0>Foresterie</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="ENG"><s0>Forestry</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="SPA"><s0>Ciencias forestales</s0><s5>04</s5></fC03><fC03 i1="05" i2="X" l="FRE"><s0>Quercus</s0><s2>NS</s2><s5>10</s5></fC03><fC03 i1="05" i2="X" l="ENG"><s0>Quercus</s0><s2>NS</s2><s5>10</s5></fC03><fC03 i1="05" i2="X" l="SPA"><s0>Quercus</s0><s2>NS</s2><s5>10</s5></fC03><fC07 i1="01" i2="X" l="FRE"><s0>Fagaceae</s0><s2>NS</s2></fC07><fC07 i1="01" i2="X" l="ENG"><s0>Fagaceae</s0><s2>NS</s2></fC07><fC07 i1="01" i2="X" l="SPA"><s0>Fagaceae</s0><s2>NS</s2></fC07><fC07 i1="02" i2="X" l="FRE"><s0>Dicotyledones</s0><s2>NS</s2></fC07><fC07 i1="02" i2="X" l="ENG"><s0>Dicotyledones</s0><s2>NS</s2></fC07><fC07 i1="02" i2="X" l="SPA"><s0>Dicotyledones</s0><s2>NS</s2></fC07><fC07 i1="03" i2="X" l="FRE"><s0>Angiospermae</s0><s2>NS</s2></fC07><fC07 i1="03" i2="X" l="ENG"><s0>Angiospermae</s0><s2>NS</s2></fC07><fC07 i1="03" i2="X" l="SPA"><s0>Angiospermae</s0><s2>NS</s2></fC07><fC07 i1="04" i2="X" l="FRE"><s0>Spermatophyta</s0><s2>NS</s2></fC07><fC07 i1="04" i2="X" l="ENG"><s0>Spermatophyta</s0><s2>NS</s2></fC07><fC07 i1="04" i2="X" l="SPA"><s0>Spermatophyta</s0><s2>NS</s2></fC07><fC07 i1="05" i2="X" l="FRE"><s0>Plante ligneuse</s0><s5>31</s5></fC07><fC07 i1="05" i2="X" l="ENG"><s0>Woody plant</s0><s5>31</s5></fC07><fC07 i1="05" i2="X" l="SPA"><s0>Planta leñosa</s0><s5>31</s5></fC07><fN21><s1>111</s1></fN21><fN44 i1="01"><s1>OTO</s1></fN44><fN82><s1>OTO</s1></fN82></pA></standard></inist><affiliations><list><country><li>Belgique</li></country><region><li>Province de Flandre-Orientale</li><li>Vienne (Autriche)</li></region><settlement><li>Gand</li><li>Vienne (Autriche)</li></settlement><orgName><li>Université de Gand</li></orgName></list><tree><country name="Belgique"><region name="Province de Flandre-Orientale"><name sortKey="Defoirdt, Nele" sort="Defoirdt, Nele" uniqKey="Defoirdt N" first="Nele" last="Defoirdt">Nele Defoirdt</name></region><name sortKey="Coppens, Hugo" sort="Coppens, Hugo" uniqKey="Coppens H" first="Hugo" last="Coppens">Hugo Coppens</name><name sortKey="De Boever, Lieven" sort="De Boever, Lieven" uniqKey="De Boever L" first="Lieven" last="De Boever">Lieven De Boever</name><name sortKey="Van Acker, Joris" sort="Van Acker, Joris" uniqKey="Van Acker J" first="Joris" last="Van Acker">Joris Van Acker</name><name sortKey="Van Den Bulcke, Jan" sort="Van Den Bulcke, Jan" uniqKey="Van Den Bulcke J" first="Jan" last="Van Den Bulcke">Jan Van Den Bulcke</name><name sortKey="Wuijtens, Inge" sort="Wuijtens, Inge" uniqKey="Wuijtens I" first="Inge" last="Wuijtens">Inge Wuijtens</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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