This manual method is labor intensive and has the possibility of incorrect image reading or keying of the information. The major problem with automatic LPR extraction is its level of accuracy. There is not necessarily a problem with the technology itself, but rather a combination of factors inherent in the way license plates are designed, issued and used. To improve the overall results, some vendors have provided the capture of multiple images with LPR run on several images. If the LPR determines the same plate information over multiple images, the confidence level of the data is improved and manual review may not be required.
Any discrepancy is placed into a manual review queue or treated as a lost revenue transaction.
For a list of LPR vendors, click here . LPR Economics LPR and ETC vendors are aware of the concerns and issues of VES and the associated costs to review images. A rough set of benchmarks is that in a manual review system, each image reviewer can process approximately 100 images per hour. This includes the entering of the plate information into data fields associated with the image. How It Works 1.