MNIST

As described here, this is the standard digit classification benchmark. The archive containing the training, validation and test file can be downloaded from here. The archive contains 3 files, each of them having 785 columns (28x28 grayscale pixel values followed by the label, 0 to 9):

1. mnist_train.txt: 50,000 examples
2. mnist_valid.txt: 10,000 examples
3. mnist_test.txt: 10,000 examples

mnist_test.txt contains the same examples as the official test file.

Flick-10,50,500

Image classification dataset:

• Description with samples
• Script to scrape the data
• Links to downloadable versions (Torch and non-Torch)