Friday, March 17, 2006

Bilinear Gaussian Lanczos? Downsampling!

Not easy to choose a downsampling algorithm. Some links:
  • mplayer: advises bilinear for quality and describes artifacts for each algo
  • a blogger: advises lanczos. This links shows pictures produced by each algo.
  • digital image interpolation: seems to have a preference for bicubic, what photoshop uses.
  • videohelp: tested various algorithms and think Bicubic spline is the best.
People don't seem to agree. If you want to check the theory:

1 comment :

  1. i have this problem too. also wikipedia describes Lanczos as being good for upsampling. it says nothing about downsampling..

    so what you chose anyways?