Dataset files directories

[sunshantong]

Hi, thank you for sharing this code.

When I download the dataset files and store them under data/. I find that they are arranged very differently from the code. For example, should IKEA_backgrounds be data/camera/test? Do I still need to download COCO train2017 and annotation? It would be more friendly if you could provide the same dataset files directories as in the code.

Thank you in advance.