Fig. 1 Information on a placard
Fig. 2 Different placards of the same class
Fig. 3 ROI extraction process
Fig. 4 ROI extraction
Fig. 5 Type I error in RoI extraction
Fig. 6 Placard recognition process
Fig. 7 Placard recognition
Fig. 8 Number template
Fig. 9 Placard recognition result
Table. 1 Placard recognition process
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