What is the meaning of writing this line of code? can you tell me behind the reason?i can't understand why to use torch.sum()

[qq542871902]

sample_features = feature_encoder(Variable(samples)) # 25x6455
sample_features = sample_features.view(CLASS_NUM,SAMPLE_NUM_PER_CLASS,FEATURE_DIM,5,5) sample_features = torch.sum(sample_features,1).squeeze(1)

[huangkainwpu24]

5-shot means they are 5 images as the same way, and use torch.sum() makes the same way pictures feature becoming one(five before, a little like average)，so 5(way)5(shot)641919(feature) becomes 5(way)6419*19(feature)

[526222883]

5-shot means they are 5 images as the same way, and use torch.sum() makes the same way pictures feature becoming one(five before, a little like average)，so 5(way)_5(shot)_64_19_19(feature) becomes 5(way)_64_19*19(feature)

what's the meaning of 64 and 19*19 ?thank you!