imresize with bilinear mode
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How does Matlab's imresize(...bilinear...) algorithm work, how does it choose the sampling points?
I am using a simple vector:
>> I = [1:5];
>> J = imresize(I, [1 7],'bilinear')
J =
1.0000 1.5714 2.2857 3.0000 3.7143 4.4286 5.0000
Manual computation using the formula from http://en.wikipedia.org/wiki/Bilinear_interpolation : 1 5/3 7/3 3 11/3 13/3 5
Things get even more confusing when I apply a scaling factor:
>> J = imresize(I, 1.3 , 'bilinear')
J =
1.0000 1.6538 2.4231 3.1923 3.9615 4.7308 5.0000
1.0000 1.6538 2.4231 3.1923 3.9615 4.7308 5.0000
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