This work is a pattern recognition application using digital images processing and neural networks, applied to the automatic recognition of car plates. There is a wide range of problems to be solved, which go from the segmentation of the useful section of the image, to the use of neural networks to carry out a correct identification. The purpose of this work is not only to achieve the implementation of a specific tool to classify car plates, but also to compare the solutions provided by applying digital images processing and neural networks.