# OpenCV Decompose projection matrix outputs

0

I got confused with the outputs of opencv `decomposeProjectionMatrix`

function.

I have the projection matrix and the camera matrix "K" and I want to get the translation vector "t"and the Rotation matrix "R" from the projection matrix

As I know the projection matrix of dimension 3*4 = K[R|t] in which "t" is a 3*1 vector

`cv2.decomposeProjectionMatrix`

returns R with dimension 3*3 which is correct but the transVect returned is of dimension 4*1 not 3*1

My question is how to get back the projection matrix from the function outputs?