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

Started 2 months ago | Discussions thread
MrBrightSide
OP MrBrightSide Contributing Member • Posts: 748
Re: How Do I Measure Noise Using Photoshop? And What Is A Significant Change?

I'm just sorry I wasn't born 40 or 50 years earlier so I could have been around when moviemakers used real lights.

Video-vs-photo wrote:

So randomness could cause missing signal which is not exactly noise :). But distort original image.
To be able to get enough light you need to have enough light so the sensor will be saturated to produce useful picture. And if sensor is not saturated enough you will see pattern like grain.
But then we apply amplification to get more use of small portion of the light that we captured and this produce much more signal which does not exist in the image - noise.
So no way to cheat with missing light, we just could add more light. Or we can get bigger glass to catch more light.
We could make our equipment better so at the end we will have small amount of added noise.
In this case shooting with cap on and shooting of gray uniform object will provide you of all possible information.

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Sit!

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