The Image Comparison and License Plate Recognition Functions in the Intelligent Parking Lot System A

When the vehicle passes through the entrance and exit of the parking lot, there will be a license plate recognition camera monitoring and shooting. This is that the license plate recognition camera is collecting the image information of the vehicle for image comparison, because the intelligent parking lot system has the functions of image comparison and license plate recognition, but there are some differences between the two. Let's talk about the difference between image comparison and license plate recognition. The image comparison function principle in the parking lot system is composed of the camera at the entrance and exit of the parking lot and the system software. Generally, the camera has no special requirements. It only needs to capture the environment map when the vehicle enters and exits, and provide the management personnel with a simple comparison to see if it is consistent. The only difference is that the owner changes the card or car. If you need to ask the situation, manually note the information, You can get in and out. The license plate recognition is an upgraded version of the image comparison function of the parking lot, which is more powerful. The license plate recognition system consists of image capture, image preprocessing, license plate location, character segmentation and character recognition. The technical requirements are high. The high-definition network recognition camera is adopted. The image recognition rate is the key. The on-site environment and light intensity should be considered. The license plate recognition surveillance camera adopts high-speed DSP embedded intelligent hardware and embedded recognition software to complete complex computer image processing technologies such as video acquisition, image preprocessing, license plate detection, license plate segmentation, character recognition, tracking and comparison, image compression and data transmission. The system has fast recognition speed and high reliability, The equipment can carry out license plate recognition for the two input videos respectively. However, license plate recognition has very high requirements for the on-site environment of the parking lot. It is inevitable that there will be insufficient light. The fill light can well ensure that the license plate recognition camera has enough light and can successfully capture the license plate. At present, intelligent parking lot license plate recognition system is more and more favored by car owners and parking lot operators. Its powerful function can enable vehicles to pass quickly, avoid road congestion in peak hours and queue up users; Take the license plate number as the access certificate to improve the safety of vehicle parking and solve the charging loopholes; Save card management and avoid the problem that users forget to bring their cards.