On 27 January 2015 at 06:03, Benjamin Gilbert <bgilbert at cs.cmu.edu> wrote: >> If so, do you know how does libjpeg do image downsampling? Gaussian >> pyramid? For 8x shrink, libjpeg does a simple 8x8 box filter in Y. I don't know what it does for x4 and x2, but I would expect they would also be box filters. John