Noise on HD200/250

Sean Adair · April 12th, 2007, 06:58 PM

I've got a 7am call tomorrow, and I'm not packed, so it won't happen tonight. I will try to get it together in the next few days though. Maybe we can figure what the trigger is. I'm wondering if it is having both very bright and very dark sections in the frame?

Tyson Perkins · April 12th, 2007, 08:23 PM

Thats what i pointed out previously in Eric Gulbransen's thread - when i am getting the noise most is in shots whereby you have contrasting light and dark colourings.

Eric Gulbransen · April 12th, 2007, 09:19 PM

Shot this today just for you Tyson. Now doesn't that make you feel all warm and cuddly?

5:30pm SanFrancisco. Bright sunlight area, mid shade area, dark shadowed face in a high contrast against the blue sky - again. Only this time we did much better I think.

Here's the web compressed screen shot jpg
http://www.gotagteam.com/images/Sach...astTestWEB.jpg

Here's the full res jpg
http://www.gotagteam.com/images/Sach...ntrastTest.jpg

Life has changed since I hooked this camera up to the TV to set back-focus. Don't know if that was it entirely, but it sure helped.

Tyson Perkins · April 12th, 2007, 10:51 PM

Thats pretty good - a far leap from what im getting!

Adam Letch · April 14th, 2007, 11:42 PM

Is the problem being raised on noise mainly sitting with the HD200, or the HD250 as well. For some reason it's occurring to me the people piping up use mainly the HD200.
Now this is a completely uneducated stab, as I'm sure some even reading this now may be using the colourful language to the effect of 'Get Real!'. But maybe if that was the case, that we have nobody complaining about the 250's, but we have a number complaining about the 200's. That because there has to be in some aspect a slightly different data path or flow, that the 200's have incurred noise over the 250??
I know, I know, I'm just desperate, but thought I'd throw it out there.

Cheers

Adam

Tim Dashwood · April 16th, 2007, 08:49 AM

Quote:

Originally Posted by Adam Letch

Is the problem being raised on noise mainly sitting with the HD200, or the HD250 as well. For some reason it's occurring to me the people piping up use mainly the HD200.
Now this is a completely uneducated stab, as I'm sure some even reading this now may be using the colourful language to the effect of 'Get Real!'. But maybe if that was the case, that we have nobody complaining about the 250's, but we have a number complaining about the 200's. That because there has to be in some aspect a slightly different data path or flow, that the 200's have incurred noise over the 250??
I know, I know, I'm just desperate, but thought I'd throw it out there.

Cheers

Adam

200 and 250 seem to be the same.

Eric Ramahatra · August 23rd, 2007, 09:58 AM

what's the settings used in this picture ?
i also have some noise and can't get ride of !

Eric Gulbransen · August 23rd, 2007, 11:32 AM

Eric, what picture are you referring to?

Just as a side note I've noticed that in a lot of the settings that people offer on this forum, "detail" is usually set real low. Also no gain. You should try some of Tim's settings here http://www.dvinfo.net/conf/showthread.php?t=62835

Jon Enkel · August 24th, 2007, 03:15 AM

Did a test with our 250 going SDI into a Digital Projector, a new top of the range
Barco, sorry but do not have the model number at this time.
We used a standard 10m tv bnc cable to connect our camera abd a Sony 500
side by side, looking at the same subject, in daylight.

We noticed a fantastic improvement over the SD, Sony 500 composite in terms of detail, for instance the 18x lens produced a lot of visible backlit dust for example, but....
The image noise produced made it appear we were running with 6db gain !
This confuses me, as this noise is not a product of the MPEG 2 codec...
Sorry, do not have screen shots at this time, but if enough interest is shown I'll organise another test and take a stills camera.

Eric Ramahatra · August 26th, 2007, 11:05 AM

i was talking about this one:
http://www.gotagteam.com/images/Sach...ntrastTest.jpg

April 12th, 2007, 06:58 PM	#31
Sean Adair Major Player Join Date: Dec 2006 Location: New York, NY Posts: 463	I've got a 7am call tomorrow, and I'm not packed, so it won't happen tonight. I will try to get it together in the next few days though. Maybe we can figure what the trigger is. I'm wondering if it is having both very bright and very dark sections in the frame? __________________ Sean Adair - NYC - www.adairproductions.com JVC GY-HM-700 with 17x5 lens, MacPro 3.2ghz 8-core, 18gb. (JVC HD200 4 sale soon)

April 12th, 2007, 09:19 PM	#33
Eric Gulbransen Major Player Join Date: Nov 2006 Location: Palo Alto, California Posts: 520	progress? Shot this today just for you Tyson. Now doesn't that make you feel all warm and cuddly? 5:30pm SanFrancisco. Bright sunlight area, mid shade area, dark shadowed face in a high contrast against the blue sky - again. Only this time we did much better I think. Here's the web compressed screen shot jpg http://www.gotagteam.com/images/Sach...astTestWEB.jpg Here's the full res jpg http://www.gotagteam.com/images/Sach...ntrastTest.jpg Life has changed since I hooked this camera up to the TV to set back-focus. Don't know if that was it entirely, but it sure helped.

April 14th, 2007, 11:42 PM	#35
Adam Letch Major Player Join Date: Feb 2006 Location: Perth, Western Australia Posts: 414	just something to throw into the mix Is the problem being raised on noise mainly sitting with the HD200, or the HD250 as well. For some reason it's occurring to me the people piping up use mainly the HD200. Now this is a completely uneducated stab, as I'm sure some even reading this now may be using the colourful language to the effect of 'Get Real!'. But maybe if that was the case, that we have nobody complaining about the 250's, but we have a number complaining about the 200's. That because there has to be in some aspect a slightly different data path or flow, that the 200's have incurred noise over the 250?? I know, I know, I'm just desperate, but thought I'd throw it out there. Cheers Adam

August 23rd, 2007, 09:58 AM	#37
Eric Ramahatra Regular Crew Join Date: Mar 2007 Location: Paris Posts: 72	what's the settings used in this picture ? i also have some noise and can't get ride of ! __________________ JVC HD200+redrock M2+1.4 lens+steadicam Flyer mini35 weddings

August 24th, 2007, 03:15 AM	#39
Jon Enkel New Boot Join Date: May 2007 Location: Cambridge UK Posts: 23	Image Noise 250 Did a test with our 250 going SDI into a Digital Projector, a new top of the range Barco, sorry but do not have the model number at this time. We used a standard 10m tv bnc cable to connect our camera abd a Sony 500 side by side, looking at the same subject, in daylight. We noticed a fantastic improvement over the SD, Sony 500 composite in terms of detail, for instance the 18x lens produced a lot of visible backlit dust for example, but.... The image noise produced made it appear we were running with 6db gain ! This confuses me, as this noise is not a product of the MPEG 2 codec... Sorry, do not have screen shots at this time, but if enough interest is shown I'll organise another test and take a stills camera.

April 12th, 2007, 08:23 PM	#32
Tyson Perkins Major Player Join Date: Oct 2006 Location: sydney, australia Posts: 221	Thats what i pointed out previously in Eric Gulbransen's thread - when i am getting the noise most is in shots whereby you have contrasting light and dark colourings.

April 12th, 2007, 10:51 PM	#34
Tyson Perkins Major Player Join Date: Oct 2006 Location: sydney, australia Posts: 221	Thats pretty good - a far leap from what im getting!

August 23rd, 2007, 11:32 AM	#38
Eric Gulbransen Major Player Join Date: Nov 2006 Location: Palo Alto, California Posts: 520	Eric, what picture are you referring to? Just as a side note I've noticed that in a lot of the settings that people offer on this forum, "detail" is usually set real low. Also no gain. You should try some of Tim's settings here http://www.dvinfo.net/conf/showthread.php?t=62835

August 26th, 2007, 11:05 AM	#40
Eric Ramahatra Regular Crew Join Date: Mar 2007 Location: Paris Posts: 72	i was talking about this one: http://www.gotagteam.com/images/Sach...ntrastTest.jpg __________________ JVC HD200+redrock M2+1.4 lens+steadicam Flyer mini35 weddings