This folder contains the data to be used in the training/testing process. There are two things to mention:

1. Every folder here contains three folders inside, which are BI, HR and LR, repectively. BI is the input for VDSR, LR is the input for EDSR/RCAN, and HR are the ground 
truth.

2. Training set and test set are together in one folder. We put training set first and then test set (ordered by name). During the training process, we set a 
paramenter to indicate the start point of test set (9 for self training and 198 for pooled training).