I am unable to understand/(I want to understand better) some stuff from lesson1.ipynb notebook please help me in this.
- Why is sz parameter assigned value 224 ?
- I know tfms means transforms but what is exactly is happening in this line (tfms=tfms_from_model(arch, sz)), why is parameter arch passed ?
3)learn = ConvLearner.pretrained(arch, data, precompute=True), since precompute=True are we using precomputed weights trained on Imagenet data?, If yes then what is learn.fit() method doing ?.
These questions may be basic but please help me.