On 7/17/20, Steinar H. Gunderson <steinar+ffm...@gunderson.no> wrote: > On Fri, Jul 17, 2020 at 02:24:44PM +0200, Paul B Mahol wrote: >>> Do you have any benchmarks on this? Or image samples? It looks like you >>> are >>> transforming to polar coordinates, doing a box blur and then transforming >>> back... how does this compare speed- and quality-wise to the more common >>> recursive scale+blend approach (which needs no trig)? >> Can you provide more info about such algorithm? > > There are some pointers in this thread: > > https://www.pouet.net/topic.php?which=4964&page=1#c184918 > > I guess this is the oldest description that I know of: > > > http://web.archive.org/web/20040905085427/http://www.themirror.nl/~plek/hypnoglow.txt > > For a more IIR-like approach, there's this: > > > https://web.archive.org/web/20010606232509/http://www.demo-scene.dk:80/tutorials/radialblur.html > > Note that the latter is so old that it predates widespread MMX :-) >
I already encountered last one. But crucial info is missing. How one build vectors? And what about circular blur? > /* Steinar */ > -- > Homepage: https://www.sesse.net/ > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
