Re: Gaussian blur kernels
Jon Watte <[email protected]>
| Newsgroups | gmane.games.devel.algorithms |
|---|---|
| Message-ID | <[email protected]> |
Fabian Giesen wrote: > versions of both the signal and the filter. But the details don't > matter, since we don't have to write it in terms of convolutions here! > > That was the whole point of my previous mail. There's no point computing > the 5x5 Gaussian convolution at full res only to throw away 3 out of > Oh, yeah, of course. I mis-understood your meaning, because the point was too obvious :-) So, yes, the down-sampling operation is, at the end, a single pass (assuming you do a 2D Gaussian in a single pass), and it samples some number of samples from the source, per output pixel. I guess even considering the "filter THEN discard" implementation is just too alien for those of us who have been actually implementing these things for so long that the details blend with memories of college beer bashes in the distant past... Sincerely, jw -- Revenge is the most pointless and damaging of human desires. ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ GDAlgorithms-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/gdalgorithms-list Archives: http://sourceforge.net/mailarchive/forum.php?forum_name=gdalgorithms-list