Prepare (MNIST Data)
python gen_pairwise_imglist.py
/home/water/caffe/build/tools/convert_imageset ./ train.txt train_lmdb –gray
/home/water/caffe/build/tools/convert_imageset ./ train_p.txt train_p_lmdb –gray
/home/water/caffe/build/tools/convert_imageset ./ val.txt val_lmdb –gray
/home/water/caffe/build/tools/convert_imageset ./ val_p.txt val_p_lmdb –gray