Is it a case that you have only 100 images of crack? Or is it you have 100 images with crack and without crack? For a similar problem microscratch or scratch, it is quite common to get only handful of defective wafers but plenty of wafers are available without that defect class.
AtmarAtma t1_j5unz1i wrote
Reply to Classify dataset with only 100 images? by Murii_
Is it a case that you have only 100 images of crack? Or is it you have 100 images with crack and without crack? For a similar problem microscratch or scratch, it is quite common to get only handful of defective wafers but plenty of wafers are available without that defect class.