Fixing chroma bleeding

[dragon_warrior]

Hi there, anyone can give me an idea of how to remove this annoying artifact?

http://i.imgur.com/sIoFo.png

(This is the next frame, which is problem-free :http://i.imgur.com/akox7.png)

Thank you very much.:thanks:

[Guest]

What is your source and how did you process it?

[dragon_warrior]

What is your source and how did you process it?

Source is a telecined footage, the screenshots tell how it looks after being gone through tfm(pp=0) and with black bars fully cropped:)

[Guest]

Post a link to an unprocessed source sample containing the problem area.

Is this from a commercial bluray or what?

[dragon_warrior]

Nah it's from a DVD.
Here's a 15-second sample http://www.multiupload.com/O0JOB6G551

[dragon_warrior]

Sorry for bumping this thread but I really need an advice on how to get rid of it. Some full-size screenshots showing how bad the image is

http://thumbnails37.imagebam.com/15257/332cc7152560880.jpg (http://www.imagebam.com/image/332cc7152560880) http://thumbnails52.imagebam.com/15257/cd45d8152560990.jpg (http://www.imagebam.com/image/cd45d8152560990) http://thumbnails41.imagebam.com/15257/8d9aaf152561052.jpg (http://www.imagebam.com/image/8d9aaf152561052) http://thumbnails35.imagebam.com/15257/bcab07152561194.jpg (http://www.imagebam.com/image/bcab07152561194) http://thumbnails36.imagebam.com/15257/e1326b152561313.jpg (http://www.imagebam.com/image/e1326b152561313) http://thumbnails22.imagebam.com/15257/86248e152561470.jpg (http://www.imagebam.com/image/86248e152561470) http://thumbnails20.imagebam.com/15257/68af91152561556.jpg (http://www.imagebam.com/image/68af91152561556) http://thumbnails24.imagebam.com/15257/a78688152561601.jpg (http://www.imagebam.com/image/a78688152561601)

TIA!

[Mounir]

With camcorder color denoise (http://acobw.narod.ru/file/ccd.zip)
What you think ?
http://img12.imageshack.us/img12/5545/ccdr.jpg

script:

ImageSource("C:\chroma-%04d.png", 0, 4, 29.970, use_DevIL = true)
ConverttoRGB32(matrix="rec601",interlaced=false)
Crop(50, 12, -462, -88)
spline36resize(width*2,height*2)
input=last
LoadVirtualDubPlugin("C:\Program Files\VirtualDub-1.9.8\plugins\Camcorder_Color_Denoise_sse2.vdf","CCD",1)
CCD(30,1) # from 0 to 100 # Default =30
StackHorizontal(input, last)

[dragon_warrior]

Thanks for the fast reply. The script does a significant job in reducing the artifact but not able to remove it completely :(
This is how a 'clean' image is supposed to look: http://i.imgur.com/akox7.png

[jmac698]

Is the face turning to the right, that is towards the hair? How many pixels is the chroma bleed? Did you try a chroma shift?

[dragon_warrior]

Is the face turning to the right, that is towards the hair? How many pixels is the chroma bleed? Did you try a chroma shift?

This is supposed to be kind of chroma bleeding, cause I've tried mergechroma many times but couldn't shift back the chroma completely.

[Didée]

It seems to me that this is mostly a problem of temporal chroma denoising. If you look e.g. at the region of eyebrow/forehead - when there is motion, and you have a spot where the flesh area beneath the eyebrow is desaturated, this is because the same spot of flesh is a spot of eyebrow in neighbor frame. The blackish eyebrow is without actual color, and this grey-color has been averaged into the problematic spot.

Since this a problem of temporal averaging, there is no true way to repair. I've tried to manage something with awarpsharp color warping, but found that the actual edges (seemingly) often are not strong enough to make awarpsharp "snap in".


Apart from that, there are a few frames with true color artifacts - spots with stray pixels of oversaturated (or even plain wrong) color. But you probably know about this.


All in all, I do not have any advice to offer. :)