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Proceedings Paper

Recognition of degraded characters on license plates
Author(s): Kenji Kurosawa; Kenro Kuroki; Naoki Saitoh
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Paper Abstract

We have studied a multi-frame image processing method for recognition of degraded car license plate images. In actual situations, various distortions such as geometric distortions or various blurs are imposed on recorded images. Therefore in order to apply the multi-frame image processing method to moving objects, it is necessary to correct geometric distortions. When images are blurred with out-of- focusing or motion blur, it is necessary to remove or suppress such distortions. In this report, we examined the geometric distortion correction and deblurring for multi- frame image processing and confirmed the effectiveness of the method. The example for real videotaped images is also shown in this report. As a result, it is recognized that the multi-frame image processing method is effective for recognizing characters on moving car license plates.

Paper Details

Date Published: 4 February 1999
PDF: 6 pages
Proc. SPIE 3576, Investigation and Forensic Science Technologies, (4 February 1999); doi: 10.1117/12.334535
Show Author Affiliations
Kenji Kurosawa, National Research Institute of Police Science (Japan)
Kenro Kuroki, National Research Institute of Police Science (Japan)
Naoki Saitoh, National Research Institute of Police Science (Japan)

Published in SPIE Proceedings Vol. 3576:
Investigation and Forensic Science Technologies
Kathleen Higgins, Editor(s)

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