Signature fingerprint identification method

A signature fingerprint identification method comprises the following steps: 1) registration of a signature fingerprint and a rolling fingerprint and manufacturing of a weak label: registering the rolling fingerprint with the signature fingerprint, and extracting a direction field and minutia points of the rolling fingerprint by using a traditional algorithm to serve as the weak label of the signature fingerprint; 2) training a multi-task full convolutional neural network based on signature fingerprint image enhancement of a weak label and minutiae extraction, taking the weak label of the signature fingerprint as a training label, and obtaining a full convolutional neural network model which simultaneously generates a signature fingerprint enhancement image and minutiae; and 3) performing multi-score strategy fusion based on the minutiae template and the texture template, performing minutiae coding and texture coding on the generated signature fingerprint enhanced graph and the minutiae, performing comparison