Translation Matrix For Image Processing Confusion

2 vues (au cours des 30 derniers jours)
Zamani Md Sani
Zamani Md Sani le 4 Juin 2020
Hi,
Im quite confuse with the matrix translation use to translate image in 3D using homogenous coordinate. In Matlab the coordinat for tx and tx is at the bottom left
whereas there are a lot of example in the internet is at on the right corner and given with a very simple example from 2D conversion as in the image.
What is the difference or is it very similar?
Thanks
Zamani

Réponses (1)

Prabhan Purwar
Prabhan Purwar le 16 Juil 2020
Hi,
These two representations of Translational Transformation are pretty the same and just vary in the way matrix multiplication takes place.
%MATLAB METHOD
>> [x y 1]*[1 0 0;0 1 0;tx ty 1]
ans =
[tx + x, ty + y, 1]
%OTHER METHOD
>> [1 0 tx;0 1 ty;0 0 1]*[x;y;1]
ans =
tx + x
ty + y
1
Thanks

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