How is image downsized when "Image is too big to fit on screen"?

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When displaying an image in imshow, I get the error that "Image is too big to fit on screen; displaying at 67%" and I notice Moire patterns in the resulting image. I'd like to know how the image is downsized to display at reduced size. Is it subsampled, or something else?

Accepted Answer

Steve Eddins
Steve Eddins on 20 Mar 2018
Nearest-neighbor interpolation.
  1 Comment
KAE
KAE on 20 Mar 2018
Thanks so much! This page has a nice demo of how nearest neighbor (and other downsampling algorithms) can introduce Moire, while some filtering beforehand can prevent it.

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