License Plate Recognition (LPR) Systems are a surveillance method that use optical character recognition (OCR) on video images to read license plates on motor vehicles. LPR camera systems can be mounted on police cars or in fixed locations. Typically, the cameras are outfitted with software that searches for the presence of a license plate. Once one is detected, the image is captured and then OCR extracts the letters and numbers on the license plate. The extracted data can then be stored, linked to other applications, or compared to information in databases. LPR systems are comparable to face recognition systems, which are computer-based security systems that can automatically detect and identify human faces.