Photography

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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.

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

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

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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?

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[–] 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.