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Up and Down Sampling wihtout Gaussian Blur

asked 2014-03-23 16:42:12 -0600

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Is there a function to up/down sample an image without Gaussian blurring, or using a custom separable kernel (besides direct pixel copying)? Like pyrUp() and pyrDown()?
If not, then does anyone have recommendations for an ultra efficient sub-sampling implementation?

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answered 2014-03-25 13:01:52 -0600

xaffeine
829 ●2 ●12 ●25

Just use resize with interpolation=INTER_NEAREST

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That'll work for down sampling, and it's what I did. But what about up sampling that leaves zeros in empty rows and columns?

Adi ( 2014-03-25 13:41:24 -0600 )edit

I usually use INTER_LINEAR, but I thought nearest would work for that. Does it not?

xaffeine ( 2014-03-25 14:05:35 -0600 )edit

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Asked: 2014-03-23 16:42:12 -0600

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Last updated: Mar 25 '14

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