Method for retrieving footprint images

US11809485B2 · kind B2 · utility

Assignees

• SUZHOU UNIVERSITY OF SCIENCE AND TECHNOLOGY · CN
• KUNSHAN PUBLIC SECURITY BUREAU · CN

Inventors

• Xuefeng Xi · 安丰镇, CN
• Yang Chen · Tangxia, CN
• Cheng Zeng · Newmarket, CA
• Qian Zhang · Cypress, US
• Cheng Cheng · 安丰镇, CN
• Baochuan Fu · 安丰镇, CN
• Zhiming Cui · 安丰镇, CN

Key dates

• Filing date: Nov 25, 2020
• Grant date: Nov 7, 2023
• Expiry date: Aug 26, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02D10/00
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A method for retrieving footprint images is provided, comprising: pre-training models; cleaning footprint data and conducting expansion pre-processing by using the pre-trained models, dividing the footprint data into multiple data sets; adjusting full connection layers and classification layers of the models; training the models again by using the data sets through the parameters of the pre-trained models; saving the models trained twice, removing the classification layer, executing a feature extraction for images in an image library and a retrieval library to form a feature index library; connecting the features extracted by three models to form fused features, establishing a fused feature vector index library; extracting the features of the images in the image library to be retrieved in advance, and establishing a feature vector library; calculating distances in the retrieval library and the image library when a single footprint image is inputted, thereby outputting the image with the highest similarity.