What is fgsm function in corruptions.py file?

[mirzaim]

In the documentation of ImageNet-C Corruption Functions, There are 19 functions. But in the implementation, there is another function called fgsm that has a weird implementation. Anyone could explain it to me what is it?

Thanks.

[kkaiwwana]

fgsm stands for Fast-Gradient-Sign-Method, which is an optimization/updating method for white-box attack. It generates adversarail patterns based on gradient values (specifically, its sign, i.e. positive or negtive).

Hope you find it helpful if you still need it.