Archive 2007 · Noise measurement..how is it done?

nathanlake
Offline
• • • • •
Upload & Sell: Off

p.1 #1 · Noise measurement..how is it done?

Quite often I will see a post that states Camera X outperforms Camera Y in terms of noise by 2 stops.

How is that measured? How do you know that the noise is the same with Camera X set to ISO 3200 and Camera Y set to ISO 800?

Is this just an eyebeall estimate or is there some measurement method being used?

Dec 07, 2007 at 04:13 PM

Jonathan Knight
Offline
• • • •
Upload & Sell: Off

p.1 #2 · Noise measurement..how is it done?

I'd say it's an eyeball measurement, but I'm just guessing.

Sorry I couldn't help you more!

Dec 08, 2007 at 10:12 PM

invalid2
Offline
• • •
Upload & Sell: Off

p.1 #3 · Noise measurement..how is it done?

I suspect it is copied from elsewhere. DxO has some automated analysis, I have not used it, but It is probably simple enough to impliment an algorithm that measures the variation in pixel values - finding the closest match for whatever metric could then lead to the X/Y claims.

Dec 09, 2007 at 04:11 AM


FM Forums \| Forum & Miscellaneous \| Join Upload & Sell