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Very interesting computer screen aliasing phenomenon
二泉映月 - 06/16/24 09:30

Nyquist sampling theorem states that "a signal's sample rate must be at least twice the signal's bandwidth to avoid aliasing".

Computer screen has a resolution of 1920 x 1080, and has ~360 x 360 pixels crossing over the interferogram (black square) in the big photo picture shown below. Then I reduce the photo picture size and post it again, there are now ~80 x 80 pixels crossing over the black square, Aliasing (small circles and rings) in the interferogram is severe.  

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tingersinger - 06/18/24 11:49

摩尔条纹?

二泉映月 - 06/19/24 07:42

有点像。但不是,摩尔条纹是不规则的,这个是规则的。