What is the difference between bilinear image resizing and averaged downsampling

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Yuzhen Lu 2020-4-11

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编辑： Nikhil Sonavane 2020-4-14

I note imresize has the method option 'bilinear'. Does this method have the same effect as averaged downsampling? For example, given an image A, imresize(A,0.5,'bilinear'), is this equivalent to 2*2 averaged binning? How is the bilinear resizing implemented by Matlab?

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Answer 1

Nikhil Sonavane 2020-4-14

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编辑：Nikhil Sonavane 2020-4-14

I would suggest you refer imresize which states that "Bilinear interpolation; the output pixel value is a weighted average of pixels in the nearest 2-by-2 neighborhood".

You may also refer to interpolation methods for further details about implementation.