Use an expression node with r > value ? 0 : 1 where value is the upper threshold. Use that matte and keymix in a heavily blurred or translated frame within the hot pixel matte.
On Tue, Jul 23, 2013 at 1:43 PM, Ron Ganbar <ron...@gmail.com> wrote: > Define hot. > Do you mean NaNs and INFs? > > > > Ron Ganbar > email: ron...@gmail.com > tel: +44 (0)7968 007 309 [UK] > +972 (0)54 255 9765 [Israel] > url: http://ronganbar.wordpress.com/ > > > On Tue, Jul 23, 2013 at 8:41 PM, David Yu <dave...@gmail.com> wrote: > >> Hi. Anyone know a script or expression to remove hot pixel noise from >> images or 3d renders? >> >> I tried some crude 3x3 matrix tricks to enhance the pixels and tried to >> "pull" the pixels out and subtract from the main image. Then i used the >> result as a mask for a median filter set at 1. >> >> Looking at the RGB channels, the hot pixel is the same value on all 3 >> channels while the neighbour pixels are different per channel. I'm hoping >> for a more elegant way to detect hot pixel using an expression. >> >> Dave >> >> _______________________________________________ >> Nuke-users mailing list >> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> > > > _______________________________________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > -- John Mangia 908.616.1796 j...@johnmangia.com
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