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

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KAE 2018-3-19

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https://ww2.mathworks.cn/matlabcentral/answers/389331-how-is-image-downsized-when-image-is-too-big-to-fit-on-screen

评论： KAE 2018-3-20

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?

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Steve Eddins 2018-3-20

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https://ww2.mathworks.cn/matlabcentral/answers/389331-how-is-image-downsized-when-image-is-too-big-to-fit-on-screen#answer_310897

Nearest-neighbor interpolation.

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KAE 2018-3-20

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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