MATLAB にはないみたいです。ただ、検索の過程でこちらが見つかりました。
"Matlab source code available for the real-time densely extracted HOG, HOF, and MBG descriptors as described in our IJMIR journal article. Download the code and run demo.m. Please note that the Matlab Computer Vision toolbox is required. For the best experience, please use Matlab 2013b or later (otherwise the optical flow may be needlessly slow)."
との記載があり、Computer Vision System Toolbox が必要みたいです。