- Memory compression by snappy (lua-csnappy) - Use RGB-wise Weighted MSE(R*0.299, G*0.587, B*0.114) instead of MSE - Aggressive cropping for edge region and some change.
- add ukbench model (models/ukbench) - ukbench model was trained by Recognition Benchmark Images (http://www.vis.uky.edu/~stewe/ukbench/) usage: $ th waifu2x.lua -m scale -model_dir models/ukbench -i input.jpg -o output.png