Firefly removal tool

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Firefly removal tool

Postby kivig » Sat Jul 03, 2010 7:31 pm

kivig Sat Jul 03, 2010 7:31 pm
Hi,
most of noise removal soft is aimed at digital cameras, and has it's own specific.
After a few tries to get rid of fireflies the way i want (not touching rest of image, no blurring) I didn't succeeded. Yet it's quite a simple task.
So I made a small tool that does that for me and decided to share it.
Hope someone will find it useful.

This is first, not tested upload.
The tool is for Windows only for now.

http://www.visnevskis.com/defly/
Last edited by kivig on Fri Jul 30, 2010 8:08 pm, edited 2 times in total.
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Re: Hot pixel removal

Postby kivig » Sun Jul 04, 2010 12:39 am

kivig Sun Jul 04, 2010 12:39 am
Just posted instructions and here's some sample:

Before:
Image
After:
Image
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Re: Hot pixel removal

Postby Zay » Sun Jul 04, 2010 1:07 pm

Zay Sun Jul 04, 2010 1:07 pm
That's great news. I will try it out. Thanks!
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Re: Hot pixel removal

Postby livuxman » Sun Jul 04, 2010 8:16 pm

livuxman Sun Jul 04, 2010 8:16 pm
I tried the program and works very well.
In fact, although the program is for windows, I've used it with Linux (via wine).
Adjusting the two parameters you can get hotpixels removed from the scene without affecting the rest. In my case, once found these values, I used to all the frames with excellent results.
I am using it in my animation (which is still in the process of render)

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Re: Hot pixel removal tool

Postby DayVids » Wed Jul 07, 2010 2:24 am

DayVids Wed Jul 07, 2010 2:24 am
I am very happy to have this tool ( THANK YOU :) )

I did want to note that it appeared to introduce some aliasing in a test image I was trying out regarding how it would do with glass.
Attachments
defly_comparison.PNG
Comparing Raw and Defly-Proc'd image, note aliasing on edges of glass top and bottom.
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Re: Hot pixel removal tool

Postby kubo » Wed Jul 07, 2010 10:45 am

kubo Wed Jul 07, 2010 10:45 am
hey, great tool, just does what it says, and it does it great!
Thanks
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Re: Hot pixel removal tool

Postby rman1974 » Thu Jul 08, 2010 10:11 am

rman1974 Thu Jul 08, 2010 10:11 am
Wow! Great job, man! It works fine, but sometimes it leaves some adjacent hot pixels (see animated gif - open it in new window). I'm not complaining - it's useful tool anyway :)
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qqqqq.gif
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Re: Hot pixel removal tool

Postby kivig » Fri Jul 09, 2010 3:01 pm

kivig Fri Jul 09, 2010 3:01 pm
Thanks!

DayVids wrote:I am very happy to have this tool ( THANK YOU :) )

I did want to note that it appeared to introduce some aliasing in a test image I was trying out regarding how it would do with glass.

Adding preserve detail a bit might help.
Otherwise if you have hot pixels in different "Layers" - for example - Separate white pixels could be considered as one and more dense but not white (noise like) fireflies as second, removing each layer in different pass (processing two times) might produce cleaner result (or worse depending on situation and settings).
For example - for bright "layer" you can use low "remove" setting, and high "preserve" setting for another.

Hope this helps, because my working machine is out of reach for almost a month.

rman1974 wrote:Wow! Great job, man! It works fine, but sometimes it leaves some adjacent hot pixels (see animated gif - open it in new window). I'm not complaining - it's useful tool anyway :)

You can run filtering a second time. Though adjacent pixels are a problem because it's difficult to separate them from needed details. Otherwise lowering "preserve" setting might work.
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Re: Hot pixel removal tool

Postby kivig » Sun Jul 18, 2010 8:33 pm

kivig Sun Jul 18, 2010 8:33 pm
By request, posted the working principle on bottom of page. Hope this helps someone.

http://www.visnevskis.com/defly/
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Re: Firefly removal tool

Postby ROUBAL » Sat Jul 31, 2010 11:57 am

ROUBAL Sat Jul 31, 2010 11:57 am
Thank you very much for this tool. It works better than all softs I tried before to do that ! ;)
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