You are the best one.

Thanks for your free releases. I also have some confusions about download data.

1. Due to the length of google drive, I cannot see the over number of images. I have downloaded 12,397 images from the link. Is it right? 

2. Can your privide more details about how to remove  invalid images? (Not important, but I'm interested in it.) 

By the way, are there any papers I can cite?