Verification code identification method and system based on deep learning technology

The invention discloses a verification code identification method and system based on a deep learning technology, and relates to the field of picture identification. The method comprises the following steps: preprocessing a verification code picture, standardizing the verification code picture through preprocessing, constructing a bag-of-word model, representing a verification code label value by using an ONEHOT code, constructing a recognition model, and extracting a feature vector according to the standardized verification code picture through a network extraction layer of the recognition model; processing the feature vectors through a linear classification network of a recognition model to obtain classification vectors, performing classification prediction according to the classification vectors through the recognition model, taking an index of a position with a maximum classification score as an index of a verification code, recovering a value of the verification code through a bag-of-words model, optimiz