1. Caltech-101 dataset.
http://www.vision.caltech.edu/Image_Datasets/Caltech101
2. Caltech-256 dataset.
http://www.vision.caltech.edu/Image_Datasets/Caltech256
3. Imagenet dataset.
http://www.image-net.org/
4. Labelme dataset.
http://cvcl.mit.edu/database.html
5. The Oxford Buildings dataset.
http://www.robots.ox.ac.uk/~vgg/data/oxbuildings