Photography

24 readers

1 users here now

A place to politely discuss the tools, technique and culture of photography.

This is not a good place to simply share cool photos/videos or promote your own work and projects, but rather a place to discuss photography as an art and post things that would be of interest to other photographers.

founded 1 year ago

MODERATORS

communick@viewfinder.pro

Where does noise really come from? (alien.top)

submitted 11 months ago by VexTheMaster@alien.top to c/photography@viewfinder.pro

26 comments fedilink hide all child comments

I know, I know, it can be caused by various factors, like high ISO, poor lighting conditions, long exposure time, heat. (not that I know why the last two cause noise)

But where does noise REALLY come from? What is noise? What does it have to do with photons and photosites?

you are viewing a single comment's thread
view the rest of the comments

[–] watermkmissing@alien.top 1 points 11 months ago (1 children)

https://en.wikipedia.org/wiki/Image_noise

Does a better example of explaining it in depth than I can.

[–] 0Bradda@alien.top 1 points 11 months ago

That's a great resource, here is another that has more visuals on sensors and how they work. https://graphics.stanford.edu/courses/cs448a-10/sensors-noise-14jan10-opt.pdf

Edit: Page 36 is where signal to noise ratio is directly addressed.