Cleaning up Image Noise in Post at DVinfo.net

Go Back   DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony HDV and DV Camera Systems > Sony HVR-HD1000

Sony HVR-HD1000
Sony's single-CMOS shoulder mount HDV camcorder.


Reply
 
Thread Tools Search this Thread
Old August 15th, 2009, 12:12 AM   #1
Regular Crew
 
Join Date: Jul 2009
Location: Jenkinsburg,GA.
Posts: 39
Cleaning up Image Noise in Post

Hi! Using the HVR100U, and encountering the low-light issues, what are the best methods of cleaning up the visual noise in post?
Marc S. Brown is offline   Reply With Quote
Old August 15th, 2009, 12:32 AM   #2
Regular Crew
 
Join Date: Aug 2009
Location: United States
Posts: 27
Try neatvideo
Neat Video :: download
John Joyner is offline   Reply With Quote
Old August 18th, 2009, 02:38 PM   #3
Major Player
 
Join Date: Aug 2008
Location: Winnipeg Manitoba Canada
Posts: 415
Adjust the contrast and saturation to hide those ugly low light pixels...
Kren Barnes is offline   Reply With Quote
Old September 23rd, 2009, 10:26 PM   #4
Regular Crew
 
Join Date: Jul 2009
Location: Jenkinsburg,GA.
Posts: 39
Adjusting, adjusting, adjusting away...

Thanks for the reply - I've been playing in Color with doing just that but the grain seems to be multi-colored. Also noticed that in a wedding footage, while the bride & groom were well lit, (they were under can-lights, actually kinda over lit) the camera made the background (far wall of the church) all grainy...

Ever tried taking the front sun shade off? Does that let in more light?
Marc S. Brown is offline   Reply With Quote
Old September 29th, 2009, 05:16 PM   #5
Regular Crew
 
Join Date: Jul 2009
Location: Jenkinsburg,GA.
Posts: 39
O.K. - this is insane!!!

I have turned on the Data option in the menu, and I've been watching what the camera is doing. I generally use manual settings.

For my grainiest footage, I have found out that my F-stop was at a 2, my shutter speed was at 60, and the auto gain was at 15-18.

Ready for the best part?

At the absolute grainiest, when the gain hit 15 - 18, the subjects were STANDING DIRECTLY UNDERNEATH CAN LIGHTS. Folks, the Lord Himself couldn't have illuminated them brighter.

During the b-roll the gain stayed between 3 and 6, then throughout the ceremony it camped out at 15. Here are some stills - the wide shot from behind was my wife's can Elura 85.
Attached Thumbnails
Cleaning up Image Noise in Post-still-1.jpg   Cleaning up Image Noise in Post-still-2.jpg  

Cleaning up Image Noise in Post-still-3.jpg  
Marc S. Brown is offline   Reply With Quote
Old September 29th, 2009, 05:22 PM   #6
Regular Crew
 
Join Date: Jul 2009
Location: Jenkinsburg,GA.
Posts: 39
Here is still number 2...

Sorry for the mess-up.

Remember, he is standing underneath the lights...
Attached Thumbnails
Cleaning up Image Noise in Post-still-2.jpg  
Marc S. Brown is offline   Reply With Quote
Old September 29th, 2009, 09:16 PM   #7
Inner Circle
 
Join Date: Jan 2003
Location: Chicago, IL
Posts: 6,609
while the HD1000 will never compete with the PD series, DSR series, EX series or Z series, for a 1 chip camera that freeze you posted really doesn't look all that bad.

Unfortunately grain is very hard to get rid of with hurting the remainder of the image but I think Neatvideo might be the way to go.

Color, levels, gain (in post) isn't going to help. Again though it really doesn't look all that bad at least based on the freeze you posted.
__________________
What do I know? I'm just a video-O-grafer.
Don
Don Bloom is offline   Reply With Quote
Old September 29th, 2009, 10:46 PM   #8
Regular Crew
 
Join Date: Jul 2009
Location: Jenkinsburg,GA.
Posts: 39
I tried it....

Wow. That's all I can say. Amazing. Thanks for the tip!
Marc S. Brown is offline   Reply With Quote
Old September 30th, 2009, 10:57 AM   #9
Major Player
 
Join Date: Aug 2008
Location: Winnipeg Manitoba Canada
Posts: 415
Hi Marc,


it doesn't look that bad, ...if you want, you can get the Magic Bullet Looks plug in to give you more options..
Kren Barnes is offline   Reply With Quote
Old October 2nd, 2009, 04:00 AM   #10
Inner Circle
 
Join Date: Feb 2009
Location: Brisbane, Australia
Posts: 2,257
Double-thanks for the tip. I've just been looking at the filtration examples and the difference is absolutely stunning.

It this sort of discovery that adds to the value of coming here. Thanks again.

Andrew
Andrew Smith is offline   Reply With Quote
Old October 3rd, 2009, 11:44 PM   #11
Major Player
 
Join Date: Jan 2009
Location: Lexington, Ky - USA
Posts: 552
Grain without bad lighting

Grain without bad lighting. This is one issue that really gets your heart racing. I had a similar experience on a recent wedding. The sanctuary had 8ft tall windows spaced about every 4 ft, florescents overhead, and incandescent cans over the alter area. Lots of light and lots of color grain. I think the mix of light temperatures throws off the sensor as it tries to make the best of the varied lighting. I will try to find a screengrab to share.

In my experience, this camera does best in outdoor sunlight or professional stage lighting. Everything else can really get unexpected results. Glad that neat video helped out. I have it saved in my links for the next time I run into this issue...
__________________
3x-HD1000u - Ikan 8000HD- custom i7 PC - Vegas Pro 13 and 11 64 bit - Premiere Pro CS4 - and a whole mess of other equipment...
Bryan Daugherty is offline   Reply With Quote
Old October 4th, 2009, 04:02 AM   #12
Regular Crew
 
Join Date: Apr 2008
Location: Echuca, Victoria, Australiamate
Posts: 179
With the "remove the lens hood" idea: leave the thing ON the camera. You will suffer more stray light problems than you can imagine that will degrade the image.

Not only that, it protects the most important part of the camera; The first thing the light passes through on its way to the tape..the front element of the lens.

Stuff that up, and you have a very expensive paperweight.

Ben
Ben Longden is offline   Reply With Quote
Old October 6th, 2009, 12:55 PM   #13
Major Player
 
Join Date: Jun 2008
Location: Milwaukee WI
Posts: 624
Hi Marc,

Since grain is hard to "fix", it is of course best to avoid in the first place. Luisa Winters, the Adobe trainer, taught me this - turn DOWN the gain, then brighten the footage in post. Much easier to clean up an image that is not grainy, and HDV allows more room for correction than DV.

I shoot with the Sony FX7, and have found that anything above 6 GAIN on that camera is unacceptable to me (where I would go 9 or even 12 with a VX-2000). In the camera menu, I set the AUTO GAIN LIMIT to +6, so it won't go above that (unless I manually override).

Another trick is to set the shutter speed to 30 when in a dark church. Fast pans will stutter at 30, but most ceremony shots are pretty static, and 30 shutter will definitely add some brightness when shooting "in a cave", as some churches seem. A very fair trade.

I never had much luck brightening DV footage, as it would fall apart pretty quickly, but HDV clips are much more forgiving and I can push the color correction farther with good results. Just throttle back on that gain when shooting, 15-18 will be nasty on any prosumer camera.

I don't know what software you edit with, but don't just use the "Brightness" slider, this brightens the entire image, meaning blacks will wash out. Use a 3-way corrector, where you can change the Highlights, MidTones and Shadows (white, gray, black) individually. This allows you to tweak the image, usually pushing up midtones and maybe bringing the blacks down a bit to make them blacker, maybe a little Highlights, you'll figure it out

Jeff Pulera
Safe Harbor Computers
Jeff Pulera is offline   Reply With Quote
Old October 6th, 2009, 09:28 PM   #14
Inner Circle
 
Join Date: Feb 2009
Location: Brisbane, Australia
Posts: 2,257
Oh wow, seeing Jeff Pulera here really makes my day. Hey Jeff, welcome to the forum and thanks for joining.

Everybody, ignore that "new boot" status he currently has. Jeff is an absolute guru, especially with the Matrox X.2 real time hardware etc. Oh, and he's also a really good bloke too.

Andrew
Andrew Smith is offline   Reply With Quote
Old October 6th, 2009, 11:42 PM   #15
Major Player
 
Join Date: Jan 2009
Location: Lexington, Ky - USA
Posts: 552
Hey Jeff, welcome to the forum. That is some very sound advice but unfortunately with this particular model, there is no manual gain control. The gain is linked to the exposure control so you have to go manual on exposure and either assign it to the ring or keep it close by on the touchscreen menu. I like to keep mine on page one of the quick access menu and often ride the exposure on the ring. I find this gain control to be the biggest drawback to the 1000u and hope that if Sony ever releases an updated version that they will separate the gain control from the exposure.
__________________
3x-HD1000u - Ikan 8000HD- custom i7 PC - Vegas Pro 13 and 11 64 bit - Premiere Pro CS4 - and a whole mess of other equipment...
Bryan Daugherty is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony HDV and DV Camera Systems > Sony HVR-HD1000

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 05:46 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network