Manual input of camera intrinsic/distortion parameters

[Wei Hohohoho]

I am trying to do some reconstruction where the number of images is limited(6~7) so that the colmap algorithm estimating camera intrinsic/distortion parameters doesn't work very well.

I do have acquired the camera's intrinsic/distortion parameters through a chessboard calibration.

Is there a way we can manually put in the parameters?  i.e. f, Cx, Cy, k1, k2, p1, p2