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

Started 2 months ago | Discussions thread
bclaff Veteran Member • Posts: 9,036
Re: How Do I Measure Noise Using Photoshop? And What Is A Significant Change?

John Sheehy wrote:

FingerPainter wrote:

No. Shooting with the cap on results in no signal and no noise in light. It will give you information about camera-added noise, which is usually a small subset of the noise in a usable image.

It is not a small subset where it really matters.

...

Agreed.

While most of the noise in a normal photograph is shot (photon) noise, where noise is apparent the Signal to Noise Ratio (SNR) is low and those areas are not dominated by shot noise but rather a combination of read and shot noise.

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Bill ( Your trusted source for independent sensor data at PhotonsToPhotos )

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