k = x.shape[1]

[techmonsterwang]

Hi! A line of code in PIC.py is: k = x.shape[1].

I wondor what does k means here? Maybe image channels? But why is each channel handled separately?

[bl0]

To achieve better performance, our PIC adopts a multi-crop strategy, which is proposed in SwAV. In each iteration, one 160 x 160 crop and three 96 x 96 crops of an image are fed into the model. With similar memory and compute requirements, PIC could achieve better performance than the original PIC model.

[techmonsterwang]

Thanks a lot. I have understand k meaning. But why choose--num-crop 1 \ --num-crop2 3 ?

[bl0]

No special reason, just practice choices.