What is the difference between bilinear image resizing and averaged downsampling

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?

Answer 1

[Nikhil Sonavane]

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.