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 <ron...@gmail.com
<mailto:ron...@gmail.com>> wrote:
Define hot.
Do you mean NaNs and INFs?
Ron Ganbar
email: ron...@gmail.com <mailto: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
<mailto: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
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