How to improve low light image quality from iso 12800 and 6400

bidjoman

thanks for the post

htinla

@sparticos I agree, re-exporting with Handbrake's 3D noise reduction worked very well for a recent project of mine. I used the medium setting which cleaned up the image rather remarkably with no apparent artifacts, it held up to viewing on a 60inch HD screen with no problem. If you don't mind having an mp4 file after processing, Handbrake is a great solution for no-cost video noise reduction.

cp_from_oz

Fantastic work @apefos !! Are the settings for ETC mode based on 720p or 1080p image size?

apefos

I did some tests using the full sensor (not etc) settings i saved for 1080 on some 720 footage and the noise reduction worked great (the 720 footage was on a 1080 timelime). The ETC settings i saved are for 1080, but you can try them on 720 to see if it works, put the ETC 720 on a 1080 timeline as i did and resize it 150% to fit the screen.

LongJohnSilver

@apefos Great thread and many thanks for the presets.

Never used Neat Video but it's time to start. I have a lot of underwater shots in near dark conditions shot between 800 and 1250 ISO. DO you think that your preset could be used also for underwater shots? Or would be better using some area of my frames which has only the blue ocean?

apefos

I think the noise profiles and noise presets will work, use the last uploaded they are very fine calibrated. But you can compare them to your own settings.

MetaControl

thanks apefos!

Could you possibly post some B/W presets/profiles?

apefos

If your footage is in color, you can use the same presets and remove the color after denoise. If you want to remove the color before denoise or if you have a bw footage from camera I think the presets/profiles will work because I believe the luminance noise will be the same. Also you can pull down the two color sliders in the settings after you load the preset. Give it a try.

duartix

Cheers @apefos!

That is "um tutorial do caralho!!!" :)

Yet I have some doubts about how you filter.

Shouldn't the filtration amounts be red > blue > green as there are channels that are noisier than others? Or does the profiling naturally account for that?

This post: http://www.personal-view.com/talks/discussion/805/gh2-grain/p1 also has some good insight into NR and NI.

apefos

Cheers, mas como se diz em portugues: "menos, menos"

When I captured the noise, shooting the greyscale pattern, I think the camera also captured the differences in RGB and I saved the profiles in Neatvideo in Auto mode, so I think the software already dealt with that.

The presets was fine tuned in manual mode.

there are two files to load in neatvideo, the profiles and the presets

profile = the noise information from camera and how the software interprets it

preset = the adjusts to clean the noise

apefos

Ivy Bridge 3570k OC 4.2GHZ Turbo Off + Gigabyte GTX650Ti 2GB 1033MHZ

Real World test rendering footage (Radius 2, 1920x1080p):

Cpu only 4 cores = 3.51 fps
Cpu 4 cores + GTX650Ti 2GB = 4.54 fps

1440 frames footage (1 minute 24p footage) Cineform 422 I frames 1920x1080p file

Cpu only 4 cores render time = 6min50sec
Cpu 4 cores + GT650Ti 2GB 1033MHZ render time = 5min17sec

(1.03 fps increase) 1.273x speed increase compared to cpu only

The real world performance is slower than Neatvideo benchmark, but is pretty good.

I chose Radius 2 to do the tests because it is the best results for my denoise from GH2 footage

Benchmarks from Neatvideo Optimize tool (shows more fps than real render):

One curious observation: the benchmarks for Cpu only 2 cores and Cpu 2 cores + Gpu is very close to the real render speed.

Frame: 1920x1080 progressive, 8 bits per channel, Radius: 2 frames Running the test data set on up to 4 CPU cores and on up to 1 GPU

CPU only (1 core): 1.75 frames/sec
CPU only (2 cores): 3.55 frames/sec
CPU only (3 cores): 4.98 frames/sec
CPU only (4 cores): 6.02 frames/sec
GPU only (GeForce GTX 650 Ti): 3.86 frames/sec
CPU (1 core) and GPU (GeForce GTX 650 Ti): 3.66 frames/sec
CPU (2 cores) and GPU (GeForce GTX 650 Ti): 4.52 frames/sec
CPU (3 cores) and GPU (GeForce GTX 650 Ti): 6.06 frames/sec
CPU (4 cores) and GPU (GeForce GTX 650 Ti): 7.25 frames/sec

Best combination: CPU (4 cores) and GPU (GeForce GTX 650 Ti)

Frame: 1920x1080 progressive, 16 bits per channel, Radius: 2 frames
Running the test data set on up to 4 CPU cores and on up to 1 GPU

CPU only (1 core): 1.43 frames/sec
CPU only (2 cores): 3.03 frames/sec
CPU only (3 cores): 4.22 frames/sec
CPU only (4 cores): 4.93 frames/sec
GPU only (GeForce GTX 650 Ti): 3.73 frames/sec
CPU (1 core) and GPU (GeForce GTX 650 Ti): 2.71 frames/sec
CPU (2 cores) and GPU (GeForce GTX 650 Ti): 4.37 frames/sec
CPU (3 cores) and GPU (GeForce GTX 650 Ti): 5.59 frames/sec
CPU (4 cores) and GPU (GeForce GTX 650 Ti): 6.33 frames/sec

Best combination: CPU (4 cores) and GPU (GeForce GTX 650 Ti)

Frame: 1920x1080 progressive, 32 bits per channel,
Radius: 2 frames Running the test data set on up to 4 CPU cores and on up to 1 GPU

CPU only (1 core): 1.73 frames/sec
CPU only (2 cores): 3.45 frames/sec
CPU only (3 cores): 4.81 frames/sec
CPU only (4 cores): 5.59 frames/sec
GPU only (GeForce GTX 650 Ti): 3.76 frames/sec
CPU (1 core) and GPU (GeForce GTX 650 Ti): 3.28 frames/sec
CPU (2 cores) and GPU (GeForce GTX 650 Ti): 4.65 frames/sec
CPU (3 cores) and GPU (GeForce GTX 650 Ti): 6.29 frames/sec
CPU (4 cores) and GPU (GeForce GTX 650 Ti): 6.9 frames/sec

Best combination: CPU (4 cores) and GPU (GeForce GTX 650 Ti)

toxotis70

does anyone has any neat video profile for the new GH3 ?

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