Reading Recognition of Digital Display Instrument Based on BP Neutral Network

To recognize digital display instrumentpsilas reading, a BP neutral network is designed, an improved BP algorithm and 15-feature extraction method is proposed. The image of instrument plate is obtained by an digital camera and transmitted to PC firstly, then an image preprocessing is carried through. The image preprocessing includes gray processing, binarization, grads sharp, vertical tilt correction, noise point removal, character segmentation, character unitary adjustment, character contraction and feature extraction. Character features are extracted by 15-feature extraction method. Finally recognize the reading by the BP neutral network. The experiment result proves that the system can scan and recognize lots of instruments, the recognition is of high veracity and great efficienc.