GRM: Gradient Rectification Module for Visual Place Retrieval
Boshu Lei,Wenjie Ding,Limeng Qiao,Xi Qiu,Boshu Lei,Wenjie Ding,Limeng Qiao,Xi Qiu
Visual place retrieval aims to search images in the database that depict similar places as the query image. However, global descriptors encoded by the network usually fall into a low dimensional principal space, which is harmful to the retrieval performance. We first analyze the cause of this phenomenon, pointing out that it is due to degraded distribution of the gradients of descriptors. Then, we...
