Research Article
A Comparative Study of Contemporary Color Tongue Image Extraction Methods Based on HSI
Table 1
Recognition rates of 4 kinds of tongue image extraction methods.
| Method | Light red tongue | Light white tongue | Red tongue | Deep red tongue | Purple tongue | Tongue with thick white coating | Tongue with thick yellow coating |
| Geodesic active contour | 94.53% | 89.16% | 71.81% | 56.98% | 66.81% | 83.58% | 61.23% | Method based on mathematical morphology and HSI | 95.34% | 95.71% | 88.01% | 96.48% | 82.99% | 67.88% | 5.61% | Method based on sequential algorithm and HSI | 92.28% | 93.15% | 96.07% | 90.23% | 92.45% | 95.60% | 72.18% | Our method with fusion of color and space information | 93.20% | 95.66% | 95.14% | 91.43% | 92.02% | 93.01% | 83.89% |
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