Hi! I am trying to subsample an image only in the vertical direction by a factor t (value is a geometric progression with common ratio sqrt(2)). Is there any built-in function to subsample images? I was thinking of restrict() but since t is variable and irrational I am not sure if that is a good i…

imresize interpolates between pixels when downscaling. You might just want to index into the image? sqrt_restrict(img, i) = img[1:round(Int,sqrt(2)^i):end, :]

Subsampling an image by a factor

General Usage

PetrKryslUCSD July 20, 2018, 9:04am 5

Then perhaps Interpolations.jl?

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Subsampling an image by a factor

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