Java port of C++ code found in StackOverflow and similarly a Python version found in GitHub No warranty! My best guess at a port but I am not an expert in C++ OpenCV and have no good way to verify it. For experimental, teaching purposes only.

https://stackoverflow.com/questions/17087446/how-to-calculate-perspective-transform-for-opencv-from-rotation-angles

github manisoftwartist/perspectiveproj

Rotate.java incudes the OpenCV trackbar example to change the rotation angles.