HOW to combine either of SURF features and HOG features or Gabor and HOG?

Hello all,

I am working on Low resolution Face recognition with Occlusion handling. My question is in two folds:

Question 1. Which of the combination of feature extraction will work well on low resolution images with occlusion: Gabor and Histogram of Oriented Gradients (HOG), or SURF and HOG features when applied to other techniques to match the features.

Question 2. I want a code to combine either of these features for better results.

Thanks