What is the difference between bilinear image resizing and averaged downsampling

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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?

Accepted Answer

Nikhil Sonavane
Nikhil Sonavane on 14 Apr 2020
Edited: Nikhil Sonavane on 14 Apr 2020
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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