Embed vector field in bigger array

2021 9 14
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更新时间：2021 9 14
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In order to undistort an image for a special purpose, I used displacement vectors.
The vector field isn't covering the entire image. Problem is the following: To apply the vectors on the image the sizes need to be identical.
Vector field: 2000x1200
Image: 6000 x 4000
Is there a way to embed the vector field in a bigger array, so that it can be applied correctly to the image. Maybe it could be embedded in a matrix of 0?
The region of interest is only the 2000x1200 field. Extrapolating the vector field to 6000x4000 doesn't deliver the desired result, neither croping the image to 2000x1200.

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KSSV
KSSV 2021-9-14
Ran in:

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Ran in:
Read about padarray.
Other option:
A = rand(4) ;
B = zeros(10) ;
B(3:6,3:6) = A
B = 10×10
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.1004 0.8599 0.4755 0.6533 0 0 0 0 0 0 0.5186 0.1796 0.7476 0.6220 0 0 0 0 0 0 0.9443 0.5652 0.8298 0.7524 0 0 0 0 0 0 0.2921 0.0010 0.6162 0.0293 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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