Pedestrian re-identification method based on local high-frequency features and hybrid metric learning

Abstract

The invention discloses a pedestrian re-identification method based on local high-frequency features and hybrid metric learning. A local frequency feature representation method is adopted, a color andtexture feature set of a target image is extracted under illumination and visual angle change conditions, a sliding window is adopted to describe local details and extract image features, the maximumvalue of features appearing locally at high frequency is taken as a feature value, and multi-scale feature descriptor cascading is obtained. After subspace dimension reduction, weight coefficients ofa metric learning matrix and a hybrid metric learning matrix thereof are obtained according to the posterior probability of sample occurrence, and finally a similarity degree as a basis for pedestrian re-identification is obtained. According to the invention, the pedestrian appearance features can be used to identify images related to the given pedestrian in a multi-camera monitoring scene, and the method has good application values in the fields of intelligent monitoring, intelligent security, criminal investigation, pedestrian retrieval, pedestrian tracking, behavior analysis and the like.

Description

technical field [0001] The invention belongs to the technical field of information technology and computer vision, and in particular relates to a pedestrian re-identification method based on local high-frequency features and mixed metric learning. Background technique [0002] The problem of using pedestrian appearance features to identify images related to a given pedestrian in a multi-camera surveillance scene is called person re-identification. Through the automatic analysis, detection, identification and tracking of multi-camera surveillance data, it can match pedestrian targets captured by different cameras at different times and locations. In recent years, the problem of pedestrian re-identification has been a research hotspot in video surveillance technology, widely used in intelligent surveillance, intelligent security, criminal investigation, pedestrian retrieval, pedestrian tracking, and behavior analysis. The in-depth research on it has greatly promoted computer v...

AI Technical Summary

Problems solved by technology

Therefore, it is very difficult to completely rely on feature description to solve the problem of pedestrian target re-identification

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