To run the patch extraction art, VLFeat is used. As of 2015, MATLAB versions do not support Xcode7 per default. To fix this, follow the instructions under http://www.mathworks.com/matlabcentral/answers/246507-why-can-t-mex-find-a-supported-compiler-in-matlab-r2015b-after-i-upgraded-to-xcode-7
The branch fine-grained contained the work of @nicodri on implementing the paper https://www.robots.ox.ac.uk/~vgg/rg/papers/berg__cvpr2013__poof.pdf in Matlab.