ghosting? at DVinfo.net

Kev O'Brien · December 12th, 2007, 12:52 PM

ive just got an a1 and have been making up a preset to film in murky grey weather(i film kitesurfing) all the colour levels are pushed up high and its giving me the look im after but is ghosting alot, if i flick through the other presets they are fine

which is the best to adjust to reduce the ghosting without loosing too much of my bright colours?

David W. Jones · December 12th, 2007, 12:58 PM

Use your vectorscope to make sure your chroma levels are in spec.

Don Palomaki · December 12th, 2007, 02:23 PM

NR1 settings can induce a sort of ghost image on moving objects - is that what you are seeing?

Kev O'Brien · December 12th, 2007, 03:27 PM

Quote:

Originally Posted by Don Palomaki

- is that what you are seeing?

yes its kind of a ghosting/motion blur type effect, as i said ive only just got the camera so im not very clued up on it yet

Kev O'Brien · December 12th, 2007, 03:41 PM

thanks!
turned the nr1 off and thats cured it but theres a bit of noise now so i will just have to experiment to find a happy medium

Lou Bruno · December 12th, 2007, 08:24 PM

Correct....I recently just started to shut any NR off and the ghosting is no longer visible.

Quote:

Originally Posted by Don Palomaki

NR1 settings can induce a sort of ghost image on moving objects - is that what you are seeing?

Peter Jefferson · December 12th, 2007, 09:45 PM

Turn up your Coring, turn on NR2. This is probably all you can do I'm afraid.

Don Palomaki · December 13th, 2007, 07:32 AM

The NR2 noise filter will soften the image, but it does not have the motion blur of NR1. NR1 uses a temporal noise reduction scheme and that introduces the motion blur/ghost effect.

Check out some of the presets (in the corresponding section here) for low light conditions. They can give you some hints as to directions/settings to try.

And don't forget to consider shower shutter speeds. That might meet your need with less problematic artifacts.

December 12th, 2007, 12:52 PM	#1
Kev O'Brien Regular Crew Join Date: Nov 2007 Location: UK Posts: 57	ghosting? ive just got an a1 and have been making up a preset to film in murky grey weather(i film kitesurfing) all the colour levels are pushed up high and its giving me the look im after but is ghosting alot, if i flick through the other presets they are fine which is the best to adjust to reduce the ghosting without loosing too much of my bright colours?

December 12th, 2007, 02:23 PM	#3
Don Palomaki Wrangler Join Date: Sep 2001 Location: Northern VA Posts: 4,488	NR1 settings can induce a sort of ghost image on moving objects - is that what you are seeing? __________________ dpalomaki@dspalomaki.com

December 13th, 2007, 07:32 AM	#8
Don Palomaki Wrangler Join Date: Sep 2001 Location: Northern VA Posts: 4,488	The NR2 noise filter will soften the image, but it does not have the motion blur of NR1. NR1 uses a temporal noise reduction scheme and that introduces the motion blur/ghost effect. Check out some of the presets (in the corresponding section here) for low light conditions. They can give you some hints as to directions/settings to try. And don't forget to consider shower shutter speeds. That might meet your need with less problematic artifacts. __________________ dpalomaki@dspalomaki.com

December 12th, 2007, 12:58 PM	#2
David W. Jones Trustee Join Date: Dec 2006 Location: Little Rock Posts: 1,383	Use your vectorscope to make sure your chroma levels are in spec.

December 12th, 2007, 03:41 PM	#5
Kev O'Brien Regular Crew Join Date: Nov 2007 Location: UK Posts: 57	thanks! turned the nr1 off and thats cured it but theres a bit of noise now so i will just have to experiment to find a happy medium

December 12th, 2007, 09:45 PM	#7
Peter Jefferson Inner Circle Join Date: Apr 2003 Location: Aus Posts: 3,884	Turn up your Coring, turn on NR2. This is probably all you can do I'm afraid.