How Do I Measure Noise Using Photoshop? And What Is A Significant Change?

Started 2 months ago | Discussions thread
J A C S
J A C S Forum Pro • Posts: 15,529
Re: Science To The Rescue Again

MrBrightSide wrote:

That’s deep. Are you saying that trying to measure noise is futile?

You can certainly try to measure something you do not know what it is.

J A C S wrote:

bclaff wrote:

My suggestion is that if you shoot raw or raw+jpeg then examining the raw files (with something like RawDigger) is the real "scientific" approach, otherwise the tone curve hopelessly muddles the results.

The problem here is that there is no clear notion what noise is, what we want to measure about it, not to mention how to measure it.

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