Hi all, this is my first question on this forum!
I calculated the intrinsic and extrinsic parameters for my fisheye camera by the calibration script found [here](https://medium.com/@kennethjiang/calibrate-fisheye-lens-using-opencv-333b05afa0b0) by which I undistort my fisheye image. However, I cannot find any information on how to transform my undistorted image back to fisheye. No such operation is available under the [geometric image transformations](https://docs.opencv.org/2.4/modules/imgproc/doc/geometric_transformations.html?#). Any ideas on how this can be done?
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