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-20.500.12792-18552020-12-15T09:47:52Z 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. 2020-10-22T12:16:48Z 2020-10-22T12:16:48Z 2000 journal article http://hdl.handle.net/20.500.12792/1855 10.1007/s001070050383 eng Attribution-NonCommercial-ShareAlike 4.0 International http://creativecommons.org/licenses/by-nc-sa/4.0/ open access |
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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 |
journal article |
| 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 |
| publishDate |
2000 |
| url |
http://hdl.handle.net/20.500.12792/1855 |
| work_keys_str_mv |
AT gonzalezadradosjr qualitygradingofcorkplankswithclassificationmodelsbasedondefectcharacterisation AT lopesf qualitygradingofcorkplankswithclassificationmodelsbasedondefectcharacterisation AT pereirah qualitygradingofcorkplankswithclassificationmodelsbasedondefectcharacterisation |
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1758004890321289216 |