关于性能提升

[92ypli]

你好，请教下，就是加入local分支训练后，相对于只用triplet loss训练原始Resnet50性能只提升一个点吗？

[huanghoujing]

我的实验结果是这样的，如果有更好的实验结果，欢迎告知哈。

[ZHHJemotion]

@huanghoujing Hi houjing! But when I trained the model with local branch(local loss and local_dist_own_hard_sample=True) on three datasets, it showed no ~1 point improvement, even worse! I am not clear why? Could you please show me the parameters you set? Thanks a lot!

[huanghoujing]

@ZHHJemotion Do you mean GL + TWGD 87.05% vs GL + LL + TWGALD 88.18% in the Train on Market1501 sheet of AlignedReID-Scores.xlsx? If you refer to this, then it is simply:

python script/experiment/train.py \
-d '(0,)' \
-r 1 \
--dataset market1501 \
--ids_per_batch 32 \
--ims_per_id 4 \
--normalize_feature false \
-gm 0.3 \
-glw 1 \
-llw 0 \
-idlw 0 \
--base_lr 2e-4 \
--lr_decay_type exp \
--exp_decay_at_epoch 151 \
--total_epochs 300

vs.

python script/experiment/train.py \
-d '(0,)' \
-r 1 \
--dataset market1501 \
--ids_per_batch 32 \
--ims_per_id 4 \
--normalize_feature false \
--local_dist_own_hard_sample true \
-gm 0.3 \
-glw 1 \
-llw 1 \
-idlw 0 \
--base_lr 2e-4 \
--lr_decay_type exp \
--exp_decay_at_epoch 151 \
--total_epochs 300

[ZHHJemotion]

@huanghoujing Yes. It is that! And I have the last one question: for with mutual learning, would it improve ~1 points with local distance than without local distance? is "~1 point improvement" also suitable for CUHK03 and Duke? But my experiemnt on CUHK03 and Duke didn't get ~1 point improvement, adding local distance shows similar with that without local distance. Thanks!

[huanghoujing]

@ZHHJemotion In my provided scores, when mutual loss is used, with and without local distance make no much difference.

[ghost]

For better performance ,I found another implementation:

Alignedreid＋+: Dynamically Matching Local Information for Person Re-Identification. Code

[Ken5YX]

Hi houjing! Why does ldm_loss work only if the local_dist_own_hard_sample is true? The paper mentioned they trained the network with both global and local loss, and only use global features in the inference stage.

[vincentman]

GL + LL + TWGALD: python script/experiment/train.py
-d '(0,)'
-r 1
--dataset market1501
--ids_per_batch 32
--ims_per_id 4
--normalize_feature false
--local_dist_own_hard_sample true
-gm 0.3
-glw 1
-llw 1
-idlw 0
--base_lr 2e-4
--lr_decay_type exp
--exp_decay_at_epoch 151
--total_epochs 300

Hi @huanghoujing , If I want to train with both global and local distance loss, how do I set glw and llw? According to above script parametres, what does "glw=1 and llw=1" mean? Why does it not make "glw+llw=1"? For example, glw=0.5 and llw=0.5.