2 ms·
That’s a shortcut if you only ever have to downsample by powers of two and you don’t mind worse image quality, since your down-sampled picture won’t use any dat
by jacobolus 9y ago
That’s a shortcut if you only ever have to downsample by powers of two and you don’t mind worse image quality, since your down-sampled picture won’t use any data from across block boundaries.
- mark-r 9y agoYou can use it in a multi-step process. Use JPEG blocks to get slightly above the target size, then Lanczos to finish it off.