Only have positive pairs?

[Meimeiainaonao]

Thanks for your sharing!

May I have a question about NCELoss? I cannot find how to choose the negative samples in your code. I only found how to choose the positive pairs in your ''random_double_sampling'' and how to calculate the NCELoss by using the positive pairs. So May I know where is the part I need?

Thanks for your help.

[dailenson]

Hi~ Thanks for your attention. As mentioned in our paper, our GlyphNCE independently samples positive pairs within a character, and samples negative samples from other characters, as illustrated in Figure 3. In our code implementation, we use the in-batch contrastive loss where the negative samples are all characters in one batch except for the anchor sample. More implementation details can be seen in SupConLoss.

[Meimeiainaonao]

Wow, Thanks for your answer! I got it!