4 February 1999 Recognition of degraded characters on license plates
Author Affiliations +
Proceedings Volume 3576, Investigation and Forensic Science Technologies; (1999) https://doi.org/10.1117/12.334535
Event: Enabling Technologies for Law Enforcement and Security, 1998, Boston, MA, United States
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.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kenji Kurosawa, Kenro Kuroki, Naoki Saitoh, "Recognition of degraded characters on license plates", Proc. SPIE 3576, Investigation and Forensic Science Technologies, (4 February 1999); doi: 10.1117/12.334535; https://doi.org/10.1117/12.334535

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