How to calibrate camera?

[AlexandrGraschenkov]

I use example from OpenCV for camera calibration. After calibrate matrix check it on learned images. All looks fine. Also get 5 values for distortion, but not use anywhere.

After this try to adapt to yours format and check on playDataset example.

double fx = cameraMatrix.at<double>(0, 0) / (double)imageSize.width;
double fy = cameraMatrix.at<double>(1, 1) / (double)imageSize.height;
double cx = (cameraMatrix.at<double>(0, 2) + 0.5) / (double)imageSize.width;
double cy = (cameraMatrix.at<double>(1, 2) + 0.5) / (double)imageSize.height;

Camera matrix looks like:

0.820361393435219	0.461474391295798	0.495088499159556	0.529959721497076	0
1280 720
crop
1280 720

After undistortion nothing changed. If I set omega to some value, undistortion apply but with strong skew of image. So how you calculate values for camera.txt file?

[AlexandrGraschenkov]

Seams guys use calibration from PTAM algorithm. After several days of resurrection of PTAM we run the calibration. But it works really bad on TUM dataset. We don't reach any success with this direction. Now we use OpenCV calibration, with RadTan model.

[LittleMing233]

Hello, I try to undistort my camera with FOV model(seems the vignette calibrate code only support this model), could you tell me how to get calibration with FOV model?

[NikolausDemmel]

Please don't double post... #8 (comment)