There are codes of our TIP paper "Group-Group Loss Based Global-Regional Feature Learning for Vehicle Re-Identification". A pytorch implementation of proposed GGL is provided in MyLoss.py. If you find this help, please kindly cite our paper:
@artical{tip-ggl-liu,
Author = {Liu, Xiaobin and Zhang, Shiliang and Wang, Xiaoyu and Tian, Qi},<br>
Booktitle = {IEEE Transactions on Image Processing},
Title = {Group-Group Loss Based Global-Regional Feature Learning for Vehicle Re-Identification},
Year = {2019}
}