License plate recognition method, system and device and medium

Abstract

The invention discloses a license plate recognition method and system, computer equipment and a medium. The method comprises the following steps: extracting a first feature map of a license plate image; carrying out dimension expansion and adaptive position calculation based on the first feature map to obtain a second feature map and a slitting position; slitting the second feature map by using the slitting position to obtain a first sub-feature map and / or a second sub-feature map; and obtaining license plate characters according to the first sub-feature map and / or the second sub-feature map. According to the scheme provided by the invention, the feature map is directly extracted from the license plate image, and then the segmentation position is obtained based on the feature map, so that different types of license plates can be segmented and spliced by adopting the adaptive segmentation position, and the license plate character recognition accuracy is improved. In addition, the scheme provided by the invention does not need to classify and identify license plates, namely, does not need to distinguish single-layer and double-layer license plates, thereby further improving the calculation efficiency.

Images