Table 2.
Comparison of studies (Documents).
| Authors | Year | Dataset | Range (Acquisition) | Methods (Processing) | Accuracy |
|---|---|---|---|---|---|
| Silva et al. | 2014 | Own dataset | NIR | PCA, MCR-ALS (Obliterating) | 42% |
| PCA, MCR-ALS (Adding) | 82% | ||||
| MCR-ALS, PLS-DA (Crossing) | 85% | ||||
| Pereira et al. | 2016 | Own dataset | MIR | PP PCA |
97.5% 87.5% |
| NIR | PP PCA |
83.3% 76.7% |
|||
| Combination | 90% | ||||
| Khan et al. | 2015 | UWA Writing Ink Hyperspectral Image Database | JSBS | JSPCA (Blue ink) | 86.7% |
| JSPCA (Black ink) | 89% | ||||
| VIS | JSPCA (Blue ink) | 75.4% | |||
| JSPCA (Black ink) | 74.7% | ||||
| Khan et al. (2) | 2018 | UWA Writing Ink Hyperspectral Image Database | VIS | CNN (Blue ink) | 98.2% |
| CNN (Black ink) | 88% | ||||
| Luo et al. | 2015 | UWA Writing Ink Hyperspectral Image Database | VIS | Own Algorithm (Blue ink) | 89.0% |
| Own Algorithm (Black ink) | 82.3% | ||||
| A. R. Martins et al. | 2019 | Own dataset | VNIR | UA, MCR-ALS | 63% |