Quality grading of cork planks with classification models based on defect characterisation
A quality grading system for cork planks is presented using a classification model based on data obtained from the image analysis of transverse and tangential sections of cork planks and taking into account different types of defects. Three types of defects may be distinguished in cork by their geometrical parameters pores (lenticular channels), physiological anomalies (nail, clay and "bofe") and pathogenic anomalies (insect galleries of Coroebus undatus (F.) and Crematogaster scutellaris O1). A discriminant analysis was used to construct the classification model the variable with the highest discriminant power was the total porosity in the transverse section, and the other variables were transformations of the specific width in the tangential section and the aspect ratio in the transverse section. The model classified two thirds of the samples in accordance with the manual classification currently used in the industry and all cases of disagreement referred to changes between contiguous quality classes. © Springer-Verlag 2000.
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dig-inia-es-10261-2918792023-02-20T07:23:14Z Quality grading of cork planks with classification models based on defect characterisation González-Adrados, J. R. Lopes, F. Pereira, H. A quality grading system for cork planks is presented using a classification model based on data obtained from the image analysis of transverse and tangential sections of cork planks and taking into account different types of defects. Three types of defects may be distinguished in cork by their geometrical parameters pores (lenticular channels), physiological anomalies (nail, clay and "bofe") and pathogenic anomalies (insect galleries of Coroebus undatus (F.) and Crematogaster scutellaris O1). A discriminant analysis was used to construct the classification model the variable with the highest discriminant power was the total porosity in the transverse section, and the other variables were transformations of the specific width in the tangential section and the aspect ratio in the transverse section. The model classified two thirds of the samples in accordance with the manual classification currently used in the industry and all cases of disagreement referred to changes between contiguous quality classes. © Springer-Verlag 2000. 2023-02-20T07:23:14Z 2023-02-20T07:23:14Z 2000 artículo Holz als Roh-und Werkstoff 58: 39-45 (2000) 0018-3768 http://hdl.handle.net/20.500.12792/1855 http://hdl.handle.net/10261/291879 10.1007/s001070050383 1436-736X en none Springer |
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A quality grading system for cork planks is presented using a classification model based on data obtained from the image analysis of transverse and tangential sections of cork planks and taking into account different types of defects. Three types of defects may be distinguished in cork by their geometrical parameters pores (lenticular channels), physiological anomalies (nail, clay and "bofe") and pathogenic anomalies (insect galleries of Coroebus undatus (F.) and Crematogaster scutellaris O1). A discriminant analysis was used to construct the classification model the variable with the highest discriminant power was the total porosity in the transverse section, and the other variables were transformations of the specific width in the tangential section and the aspect ratio in the transverse section. The model classified two thirds of the samples in accordance with the manual classification currently used in the industry and all cases of disagreement referred to changes between contiguous quality classes. © Springer-Verlag 2000. |
| format |
artículo |
| author |
González-Adrados, J. R. Lopes, F. Pereira, H. |
| spellingShingle |
González-Adrados, J. R. Lopes, F. Pereira, H. Quality grading of cork planks with classification models based on defect characterisation |
| author_facet |
González-Adrados, J. R. Lopes, F. Pereira, H. |
| author_sort |
González-Adrados, J. R. |
| title |
Quality grading of cork planks with classification models based on defect characterisation |
| title_short |
Quality grading of cork planks with classification models based on defect characterisation |
| title_full |
Quality grading of cork planks with classification models based on defect characterisation |
| title_fullStr |
Quality grading of cork planks with classification models based on defect characterisation |
| title_full_unstemmed |
Quality grading of cork planks with classification models based on defect characterisation |
| title_sort |
quality grading of cork planks with classification models based on defect characterisation |
| publisher |
Springer |
| publishDate |
2000 |
| url |
http://hdl.handle.net/20.500.12792/1855 http://hdl.handle.net/10261/291879 |
| work_keys_str_mv |
AT gonzalezadradosjr qualitygradingofcorkplankswithclassificationmodelsbasedondefectcharacterisation AT lopesf qualitygradingofcorkplankswithclassificationmodelsbasedondefectcharacterisation AT pereirah qualitygradingofcorkplankswithclassificationmodelsbasedondefectcharacterisation |
| _version_ |
1767603267819274240 |