| 发明名称 |
Systems and methods for processing digital image data |
| 摘要 |
<p>A digital filter 10 is matched to a reference gray-level profile obtained by averaging the gray-level profiles measured across a plurality of vertical character strokes on one or more vehicle licence plates. Digital image data is supplied to the filter row-by-row and the filter response is used by a processor 12 to determine the polarity of the vehicle licence plate.</p> |
| 申请公布号 |
GB2343045(B) |
申请公布日期 |
2003.03.05 |
| 申请号 |
GB19980023076 |
申请日期 |
1998.10.21 |
| 申请人 |
* RACAL RESEARCH LIMITED;* RACAL MESSENGER LIMITED;* MESSENGER VEHICLE IDENTIFICATION SYSTEMS LIMITED |
发明人 |
CHARLES IAN * ATTWOOD |
| 分类号 |
G06K9/38;(IPC1-7):G06K9/36 |
主分类号 |
G06K9/38 |
| 代理机构 |
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代理人 |
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