This is a list of other notable MATLAB functions included in VLFeat
vl_imsmooth smoothes an image by a Gaussian kernel
  (simple but very useful as it is generally much faster than MATLAB's
  general purpose smoothing functions).vl_plotframe plots a variety of feature frame types (such as oriented ellipses).vl_binsum performs binned summations, useful as a
  building block for the fast computation of
  histograms. vl_whistc computes weighed histograms.vl_imarray and vl_imarraysc arrange and visualize multiple
images in a gridvl_imsc scales the image range;vl_tightsubplot is similar to built-in
subplot, but produces narrower margins.vl_cf makes a copy of a figure.vl_rodr and vl_irodr compute the Rodrigues' formula and
  its inversevl_override overrides members of a structure with members of
  another structure.vl_imwbackward warps an image by the inverse mapping method
  (generally much faster than MATLAB general purpose warping
  functions).vl_waffine computes the affine warp of a set of
  points. vl_tps, vl_tpsu, vl_wtps
  compute the thin-plate spline warp of a set of points. vl_witps
  computes the inverse thin plate warp of a set of point (by
  numerically inverting the transformation). They may be used in
  combination with vl_imwbackward.vl_xyz2lab,
  vl_xyz2luv, vl_xyz2rgb, vl_rgb2xyz
  convert color spaces.vl_rcos, vl_gaussian, vl_dgaussian,
vl_ddgaussian
compute some useful special functions.