Translation Matrix For Image Processing Confusion
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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
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/309659/image.jpeg)
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.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/309662/image.png)
What is the difference or is it very similar?
Thanks
Zamani
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Answers (1)
Prabhan Purwar
on 16 Jul 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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