Research Article
Multimodal Indexing of Multilingual News Video
Table 4
Results for keyword spotting in ticker text with constrained keyword list.
| | | | Keywords found | | Story id | No. of distinct ticker texts | Total instances of keywords present | On raw frame | On localized text region | After image super-resolution | After dictionary-based correction |
| | | | | | | |
| | English Channels | | | | | | | | E001 | 5 | 36 | 15 | 17 | 22 | 27 | | E002 | 4 | 23 | 6 | 7 | 14 | 18 | | E003 | 4 | 23 | 9 | 10 | 13 | 16 | | E004 | 6 | 35 | 17 | 19 | 24 | 28 | | E005 | 4 | 31 | 10 | 13 | 17 | 22 | | E006 | 7 | 39 | 19 | 21 | 25 | 31 | | E007 | 4 | 18 | 7 | 8 | 11 | 16 | | E008 | 1 | 1 | 1 | 1 | 1 | 1 | | E009 | 5 | 16 | 7 | 7 | 9 | 12 | | Subtotal—English | 40 | 222 | 91 | 103 | 136 | 171 |
| | Retrieval performance—English (%) | 40.99 | 46.40 | 61.26 | 77.03 |
| | Bangla Channels | | | | | | | | B001 | 3 | 6 | 0 | 0 | 2 | 4 | | B002 | 3 | 6 | 1 | 1 | 2 | 4 | | B003 | 5 | 7 | 3 | 3 | 5 | 6 | | B004 | 3 | 4 | 1 | 1 | 2 | 3 | | B005 | 5 | 11 | 4 | 4 | 5 | 7 | | Subtotal—Bangla | 19 | 34 | 9 | 9 | 16 | 24 |
| | Retrieval performance—Bangla (%) | 26.47 | 26.47 | 47.06 | 70.59 |
| | Overall retrieval performance (%) | 39.06 | 43.75 | 59.38 | 76.17 |
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