I did run following ones as the installation guide.

git clone https://github.com/lengstrom/fast-style-transfer.git
cd fast-style-transfer

pyenv local 2.7.9

pip2.7 install --upgrade pip
pip2.7 install virtualenv
python2.7 -m virtualenv dev
source dev/bin/activate

cat << 'EOT' > requirements.txt
tensorflow==0.11.0
Pillow==3.4.2
scipy==0.18.1
numpy==1.11.2
EOT

sudo apt

I'm trying to understand the code but unable to understand your loss calculation function can you please explain what are you doing because it doesn't seem you are doing anything in linear kernel you have commented it out in mmd_loss.py