[PaulHoule]

I have been wanting to do this for my

https://www.kandaovr.com/qoocam-ego

after reading Lenny Lipton's books about stereo cinematography I've been debugging my stereograms and one thing I know is that the lenses on that thing have a little bit of pincushion distortion which means stereo pairs that are supposed to be perfectly aligned vertically aren't quite.

I know DxO makes distortion correct filters for lens/camera pairs and I was sure I could make one by taking pictures of a grid but this gives a definite path to doing it.

[michaelt]

The ideas listed in the document are about correcting distortion when the image has already been taken and you can't control the scene.

As you've got the camera in hand, you've got an even simpler option available: You can print a special pattern called a 'ChArUco board' [1] take pictures of it from a few different angles, then you can calculate the camera "intrinsics" (field of view, lens distortion parameters) and "extrinsics" (relative positions of your two cameras) based on those images.

[1] https://docs.opencv.org/3.4/da/d13/tutorial_aruco_calibratio...

[qingcharles]

You can also use the patterns to generate DNG/RAW lens profiles which allow automatic lens correction in popular apps like Lightroom etc:

Adobe Lens Profile Creator

https://helpx.adobe.com/camera-raw/digital-negative.html