HV20: Blue streaky vertical lines in low light recordings at DVinfo.net

Rikki Bruce · May 9th, 2007, 07:54 PM

Just wondering if this is a natural thing to see in very low light recording, the faint blue lines going down the image, most prominent on the far right about an inch in.

(Levels brought up to show it better)

Catches your eye when watching it on the PC monitor but normal lighting seems fine.

R.

Robert Ducon · May 10th, 2007, 09:25 PM

I think it's just when the gain is at maxium, which only happens when the camera is in light that is far too low anyway. I noticed the same thing on mine - the streaks ranged from blue to red. I don't use this camera's footage in light that low.

Kevin Dorsey · May 10th, 2007, 10:43 PM

I've seen the blue line myself. It's been mentioned quite a bit on other forums. As Robert said it's only visible in extremely low light situations when the gain is cranked up.

Ali Husain · May 11th, 2007, 01:52 AM

looks like banding noise: http://www.cambridgeincolour.com/tutorials/noise.htm

James Miller · May 11th, 2007, 02:05 AM

Also, Nice to see someone else with a messy desk :-)

Pieter Jongerius · May 11th, 2007, 01:08 PM

Hmm, I thought only the HV10 suffered from this. Was the cam on 60i or 24p? (I would guess the first)

Rikki Bruce · May 11th, 2007, 04:59 PM

Not entirely sure, its a PAL one. Think it was 25p mode.

Pieter Jongerius · May 12th, 2007, 02:33 AM

...well i can only hope you're wrong then ;).

others around here have suggested ways to improve low light quality and reduce noise, such as using 24p, higher shutters and lower gain.

(but as i've said before, for me that's all theory until 'my' hv20 arrives... good thing about that is that until that day arrives, i'll have time to keep my desk clean ;)

tnx

May 9th, 2007, 07:54 PM	#1
Rikki Bruce Regular Crew Join Date: Feb 2007 Location: Glasgow. Scotland Posts: 79	HV20: Blue streaky vertical lines in low light recordings Just wondering if this is a natural thing to see in very low light recording, the faint blue lines going down the image, most prominent on the far right about an inch in. (Levels brought up to show it better) Catches your eye when watching it on the PC monitor but normal lighting seems fine. R.

May 10th, 2007, 09:25 PM	#2
Robert Ducon Major Player Join Date: Nov 2006 Location: Victoria BC Posts: 400	I think it's just when the gain is at maxium, which only happens when the camera is in light that is far too low anyway. I noticed the same thing on mine - the streaks ranged from blue to red. I don't use this camera's footage in light that low. __________________ Mac + Canon HV20

May 10th, 2007, 10:43 PM	#3
Kevin Dorsey Regular Crew Join Date: Nov 2006 Location: Syracuse, NY Posts: 64	I've seen the blue line myself. It's been mentioned quite a bit on other forums. As Robert said it's only visible in extremely low light situations when the gain is cranked up.

May 11th, 2007, 01:52 AM	#4
Ali Husain Regular Crew Join Date: Oct 2005 Location: San Jose, CA Posts: 141	looks like banding noise: http://www.cambridgeincolour.com/tutorials/noise.htm

May 11th, 2007, 02:05 AM	#5
James Miller Major Player Join Date: Mar 2007 Location: Sussex, UK Posts: 317	Also, Nice to see someone else with a messy desk :-)

May 11th, 2007, 01:08 PM	#6
Pieter Jongerius Regular Crew Join Date: Jan 2007 Location: Netherlands Posts: 101	Hmm, I thought only the HV10 suffered from this. Was the cam on 60i or 24p? (I would guess the first)

May 11th, 2007, 04:59 PM	#7
Rikki Bruce Regular Crew Join Date: Feb 2007 Location: Glasgow. Scotland Posts: 79	Not entirely sure, its a PAL one. Think it was 25p mode.

May 12th, 2007, 02:33 AM	#8
Pieter Jongerius Regular Crew Join Date: Jan 2007 Location: Netherlands Posts: 101	...well i can only hope you're wrong then ;). others around here have suggested ways to improve low light quality and reduce noise, such as using 24p, higher shutters and lower gain. (but as i've said before, for me that's all theory until 'my' hv20 arrives... good thing about that is that until that day arrives, i'll have time to keep my desk clean ;) tnx