The application discloses a signature
handwriting identification method based on a multi-
modal data joint pre-training mode, collects handwritten electronic text sequence data, positive writing signatures of different signers and corresponding imitated signature sequence data; converts the obtained handwritten electronic text and positive imitated sequence data into corresponding image data representations and carries out data pre-
processing; trains a multi-
modal data joint classification model by using text sequence data and text image data, obtains a text sequence pre-training
encoder and a text image pre-training
encoder; carries out fine-tuning training on signature sequence data or signature image data with authenticity labels based on the text sequence pre-training
encoder or the text image pre-training encoder to obtain corresponding signature
sequence feature extractors or signature image feature extractors; extracts feature vectors according to corresponding signature feature extractors according to the
modal of a to-be-detected sample, and compares the feature vectors with reserved sample features to determine authenticity. The application is widely used in places where signatures need to be identified.