All images are 1024x1024 JPEG images stored with a low compression quality.  Because there are over 40K images, the file size would be very large if lossless PNG files were used.  You will likely need to decrease the image size before feeding into a neural network.  The zip down load contains the JPEG images with names such as mc-1.jpg.  There are also three CSV files

* train.csv - Labeled training data.
* test.csv - The file you should score and submit.
* sample.csv - A sample submission file.

The label for this training set is a true (1)/false (0) value that indicates if the image is fake.