Dogs
https://www.pytorchtutorial.com/pytorch-c-api-4-cat-dog-classifier-2/
Flowers classifier
https://www.pytorchtutorial.com/flower-species-classifier/
https://zhuanlan.zhihu.com/p/79807661
Looking directly at the second option - starting from the source code level
https://blog.csdn.net/weixin_39965127/article/details/102686314