Created by: lidanqing-intel

Improve the script. Read from tar file directly without extracting to folders.

Resnet50 and mobilenet accuracy on generated full dataset:

Resnet50: Avg top1 INT8 accuracy: 0.7652 Avg top1 FP32 accuracy: 0.7663

Mobilenet: Avg top1 INT8 accuracy: 0.7035 Avg top1 FP32 accuracy: 0.7078

The checksum changed because the order of the data now is the same with the contents order in tar file, not the order of image filenames.