# Visual Place Recognition Based on Dynamic Difference and Dual-Path Feature Enhancement

## TL;DR

This paper introduces a new method for visual place recognition that improves performance in changing environments and reduces noise interference.

## Contribution

The novel DD–DPFE method uses dynamic difference and dual-path feature enhancement to improve visual place recognition robustness.

## Key findings

- The proposed DD–DPFE method significantly improves visual place recognition in varying environments.
- The method enhances discriminative power and anti-jamming ability, especially in night scenes.
- Global and local feature branches work synergistically to handle appearance changes and noise.

## Abstract

Aiming at the problem of appearance drift and susceptibility to noise interference in visual place recognition (VPR), we propose DD–DPFE: a Dynamic Difference and Dual-Path Feature Enhancement method. Embedding differential attention mechanisms in the DINOv2 model to mitigate the effects of process interference and adding serial-parallel adapters allows efficient model parameter migration and task adaptation. Our method constructs a two-way feature enhancement module with global–local branching synergy. The global branch employs a dynamic fusion mechanism with a multi-layer Transformer encoder to strengthen the structured spatial representation to cope with appearance changes, while the local branch suppresses the over-response of redundant noise through an adaptive weighting mechanism and fuses the contextual information from the multi-scale feature aggregation module to enhance the robustness of the scene. The experimental results show that the model architecture proposed in this paper is an obvious improvement in different environmental tests. This is most obvious in the simulation test of a night scene, verifying that the proposed method can effectively enhance the discriminative power of the system and its anti-jamming ability in complex scenes.