The vehicle information may be stored in the vehicle information base in the form of image, i.e., a vehicle image is stored in the vehicle information base. Correspondingly, when determining whether the extracted vehicle information is consistent with the standard vehicle information in the vehicle information base, it may be realized by directly matching the vehicle image to the standard vehicle image in the vehicle information base, i.e., directly matching the images. However, this manner of matching is low in speed and poor in precision.

The vehicle information may also be stored in the vehicle information base in the form of character, i.e., the vehicle information stored in the vehicle information base is text information. Correspondingly, when determining whether the extracted vehicle information is consistent with the standard vehicle information in the vehicle information base, the image obtainer 1 first extracts the vehicle information according to the vehicle image, i.e., obtains and records the vehicle information in the form of text and then sends the vehicle information to the second identifier 3 so that the second identifier 3 matches the vehicle information within the vehicle information base, i.e., directly matches the characters. Directly matching the characters can realize fast and precise matching.

When the vehicle information of the current vehicle is extracted, the vehicle information of the vehicle may also be stored in the vehicle information base for future use.

The vehicle information base may be set up in a cloud server, and the apparatus for identifying license plate tampering may retrieve vehicle information of the same license plate number with the current vehicle from the cloud server to make comparison or matching.