Table 9 Complete ligatures (per number of characters) with respective recognition rates
From: Segmentation-free optical character recognition for printed Urdu text
Characters in ligature | Total ligatures | Correctly recognized | Recognition rate |
|---|---|---|---|
Isolated characters | 2705 | 2657 | 98.22% |
Two character ligatures | 2391 | 2287 | 95.65% |
Three character ligatures | 733 | 483 | 65.89% |
Four character ligatures | 106 | 49 | 46.22% |
Five character ligatures | 31 | 14 | 45.16% |
Six character ligatures | 2 | 0 | 0.00% |
Seven character ligatures | 1 | 0 | 0.00% |
Punctuations | 218 | 218 | 100% |
Total true ligatures | 6187 | 5708 | 92.26% |