How to implement Bicubic interpolation in an image?

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I have 256*256 dimension image and I want to make it 512*512 using bicubic interpolation. How to do it using csapi(x,y) or csapi(x,y,xx) function? What should be taken inplace of x & y here?

Answers (2)

TheRealTonyStark
TheRealTonyStark on 13 Oct 2019
Edited: TheRealTonyStark on 13 Oct 2019
The resizing of image using bicubic interpolation method:
Example
J = imresize(I, 2, 'bicubic');%in your case
J: Resized image.
I: input image.
0.5: scaling factor

Image Analyst
Image Analyst on 1 Dec 2017
Simply use imresize():
resizedImage = imresize(originalImage, [512, 512]);
I never heard of the function csapi(). It does not show up in the help for my MATLAB.
  4 Comments
Nidhi Soni
Nidhi Soni on 1 Dec 2017
I am trying to apply DWT and BEMD on an image. Then adding these DWT and BEMD components but DWT components have reduced dimension than BEMD component, So I want to interpolate them.
TheRealTonyStark
TheRealTonyStark on 13 Oct 2019
Increasing the size will create irreularities in the image. To smoothen that out we use spline fitting.

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