Today, I was looking for something in my laptop and came across warning messages produced by chrome (see the image). See the last error. Now, you should have an idea about the error because we talked about affine transform matrices.
I showed you how to find new pixel locations after the transformation, however, didn't tell you that it is more convenient to find the target image's pixel locations in the current image. That is, I showed you that:
\[AT=B\] but actually what is used in applications is this: \[A=BT^{-1}\] So, the error in the message list stems from trying to take the inverse of \(T\) where \(T\) is singular for some reason.
(Remember, A or B is not pixel values of the image. It is a 3 column matrix with first and second columns are coordinates and the last column is the pixel value.)

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