Table 3.
Classification results, correct classification (%). Classification of heartwood content from pine chips, bark content from birch chips and pine chips from birch chips and birch bark. MC range 0–60%. Test groups and correct classification using decision tree (DT), support vector machine (SVM) and K-nearest neighbor (KNN). N = number of samples. Birch/pine classification included three classes: birch, pine and birch bark.
| Material Test |
DT (%) | SVM (%) | KNN (%) | N |
|---|---|---|---|---|
| Pine100 | 73 | 85 | 90 | 41 |
| Pine75 | 69 | 85 | 89 | 80 |
| Birch100 | 89 | 93 | 93 | 53 |
| Birch 75 | 74 | 83 | 75 | 101 |
| Birch/pine100 | 65 | 78 | 69 | 80 |
| Birch/pine 75 | 71 | 84 | 86 | 152 |