Novel and fast algorithms of license plate locations and extractions

For the limitation of current license plate location algorithms, present an algorithm of the license plate location based on image energy and its practical formulas. Introduce the algorithm of extraction and methods to verify region of license plate. It takes full advantage of characteristics of the license plate, such as complicated textures, sharp-cut contrast and so on. It also has the advantages to avoid the difficulty to choose a threshold and the influence of colors changes due to light. A large number of experiments demonstrate that the algorithm is of higher accuracy and of fast speed.