Not NaNs. the hot pixel have RGB values do isnan does not work
On Wed, Jul 24, 2013 at 5:28 AM, Frank Rueter <[email protected]> wrote: > and if it's NaNs or infs you need to isolate, you are after you can use > "isnan()" and "isinf()" in the Epxresison node to get a mask > > > On 24/07/13 09:04, Frank Rueter wrote: > > I'd use this technique to generate the mask for the bad pixels, but > instead of blurring heavily, I would stencil out the original frame with > the mask, then blur it just enough for a subsequent unpremult to fill the > gap. > > > On 24/07/13 05:47, John Mangia wrote: > > 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 <[email protected]> wrote: > >> Define hot. >> Do you mean NaNs and INFs? >> >> >> >> Ron Ganbar >> email: [email protected] >> 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 <[email protected]> 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 >>> [email protected], http://forums.thefoundry.co.uk/ >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>> >> >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> > > > > -- > John Mangia > > 908.616.1796 > [email protected] > > _______________________________________________ > Nuke-users mailing [email protected], > http://forums.thefoundry.co.uk/http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > > > _______________________________________________ > Nuke-users mailing [email protected], > http://forums.thefoundry.co.uk/http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >
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