could you tell me paper related to 'v5cubic'?

Question

WOOSUK CHOI 2017-7-14

回答： Sruthi Geetha 2017-7-17

There is a question when using the 'imresize' function to resize an image in one direction.

I want to scale an image with a size of [1000 200] to [1000 800] using 'bicubic' method.

I found that the process is the same as' interp1 (X, V, Xp, 'v5cubic') except for the boundary area.

However, when using the 'bucibic' method, I do not know how the 'imresize' function fills some values near the bounding area.

Can you tell me the 'imresize' process or the 'v5cubic' kernel?

Thank you for reading.

Have a nice day.

Answer 1

Sruthi Geetha 2017-7-17

For bicubic interpolation, the output pixel value is a weighted average of pixels in the nearest 4-by-4 neighborhood. Bicubic interpolation can produce pixel values outside the original range. The following link describes how "imresize" function in MATLAB works: https://www.mathworks.com/help/images/ref/imresize.html?searchHighlight=imresize&s_tid=doc_srchtitle "v5cubic" is a cubic convolution interpolation method. The below link shows how the "interp1" function in MATLAB works: https://www.mathworks.com/help/matlab/ref/interp1.html?searchHighlight=interp1&s_tid=doc_srchtitle