How can you have 1000 images in each folder AND have 10 000 images in each class, and 8 images for valid and 250 in test for each class. I dont understand this
The one image to one class means that each image corresponds to one class. An image can be an image of a cat or an image of a dog.
For multi-label classification problems, an image can be a cat image and a dog image. That’s the stuff your link talk about