3D noise reduction should always be off

[wombsganz]

I think 3DNR should always be turned off. It uses information from previous frames to reduce noise in the current frame. This results in great images of still objects, but hurts the clarity of objects in motion when the 3DNR ramps up.

In a noisy image, we can still ignore the noise and make out most of the detail. But in a blurry image from 3DNR there is no way to see the details.

For now, the first thing I do when setting up a camera is switch to manual gain+exposure and disable 3DNR, then go back and tweak shutter and exposure. This does result in some film grain effect even during the day, but this is the cost we pay to have sharp images in motion. Do you agree that 3DNR should always be turned off?

 

[bigredfish]

Depends on a lot of things, mostly no.

While I like the method of setup, leave DNR for last after getting the most out of the image controls, Much of it depends on Light, like most things in our hobby/business,

Daytime, with certain cameras/sensors, at certain distances, with certain targets, and high light levels maybe.
Night with the less than ideal sensors used in the surveillance camera market? Nope.


Both examples below have 3DNR ON then OFF for about 15 seconds


New 3449 PRO 1/1.8" sensor with low light and cheap AI image manipulation and SSA

View attachment 192.168.1.110_ch12_20251211080138_20251211080209.mp4



4K-T with 1/1.2" sensor

View attachment 192.168.1.110_ch11_20251211080600_20251211080624.mp4

 

[bigredfish]

Like most things with surveillance cameras, we have to adjust for a wide variety of light conditions and target types/speeds

I can make you a very pretty video at 12 Noon of a person riding a bicycle with close up facial detail, that will fall apart at the first cloud cover or rain or 30 min before dusk, or be a blurry ghost when a car passes at 50mph

Everything we do with settings is a trade off to get the best image in the widest range of lighting conditions and target speeds with relatively shitty sensors

 

[steve1225]

I think 3DNR should always be turned off. It uses information from previous frames to reduce noise in the current frame. This results in great images of still objects, but hurts the clarity of objects in motion when the 3DNR ramps up.

In a noisy image, we can still ignore the noise and make out most of the detail. But in a blurry image from 3DNR there is no way to see the details.

For now, the first thing I do when setting up a camera is switch to manual gain+exposure and disable 3DNR, then go back and tweak shutter and exposure. This does result in some film grain effect even during the day, but this is the cost we pay to have sharp images in motion. Do you agree that 3DNR should always be turned off?

All modern cameras in mobiles / drones / sport cameras and CCTV cams are using some form of 3DNR.

Without 3DNR you will see HOW CRAPY modern sensors are and how much noise they produce... even at day condition (like cloudy sky etc)..

Only true profesional video cams with much much bigger & better & pricey sensors (like DSLR or mirror-less ones with full frame 36mm sensor) don't use 3DNR..

 

[[email protected]]

Great

Depends on a lot of things, mostly no.

While I like the method of setup, leave DNR for last after getting the most out of the image controls, Much of it depends on Light, like most things in our hobby/business,

Daytime, with certain cameras/sensors, at certain distances, with certain targets, and high light levels maybe.
Night with the less than ideal sensors used in the surveillance camera market? Nope.


Both examples below have 3DNR ON then OFF for about 15 seconds


New 3449 PRO 1/1.8" sensor with low light and cheap AI image manipulation and SSA

View attachment 234263



4K-T with 1/1.2" sensor

View attachment 234264

Great video & explanation for the requirements for some DNR.