libvlfeat-doc 0.9.20+dfsg0-1 (armhf binary) in ubuntu xenial

 VLFeat implements popular computer vision algorithms including SIFT, MSER,
 k-means, hierarchical k-means, agglomerative information bottleneck, and quick
 shift. It is written in C for efficiency and compatibility, with interfaces in
 GNU octave for ease of use, and detailed documentation throughout
 .
 Documentation