title: How to resize/scale an image in Octave?
body: <p>Is there a built-in command to resize/scale a monochrome image (represented by an array of floats for instance) in Octave ?</p>
  
  <p>If not, what would be a fast implementation for a basic algorithm with some amount of interpolation (bilinear let's say) ?
  I actually only need to downsample my image (scale it down), which may simplify the problem.</p>