What is the difference between bilinear image resizing and averaged downsampling

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Yuzhen Lu
Yuzhen Lu 2020년 4월 11일
편집: Nikhil Sonavane 2020년 4월 14일
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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Nikhil Sonavane
Nikhil Sonavane 2020년 4월 14일
편집: Nikhil Sonavane 2020년 4월 14일
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.

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