Fisheye lens (FOV = 180 deg.) calibration

[akmaral.mo...@nu.edu.kz]

Dear Davide Scaramuzza,

I am using OCamCalib Toolbox to calibrate fisheye lens camera with 180 deg. FOV. However, ever I follow steps given in your tutorial, I am getting an huge average error = 400 - 500 (pixels). Sum of squared error is also huge. With Reproject on image I am not getting straight lines showing directions of y, x. Could you give me a hint what I am missing or should do to get good result with fisheye camera calibration. Thank you.

[myste...@gmail.com]

On Saturday, October 6, 2018 at 12:07:10 PM UTC+3, akmaral.mo...@nu.edu.kz wrote:
> Dear Davide Scaramuzza,
>
> I am using OCamCalib Toolbox to calibrate fisheye lens camera with 180 deg. FOV. However, ever I follow steps given in your tutorial, I am getting an huge average error = 400 - 500 (pixels). Sum of squared error is also huge. With Reproject on image I am not getting straight lines showing directions of y, x. Could you give me a hint what I am missing or should do to get good result with fisheye camera calibration. Thank you.

Hello, I have successfully calibrated a camera with a fisheye len with FOV 180 deg with an average error less than 1 pixel. I believe you are doing something wrong during the corner extraction procedure. Can you please upload a sample image and the input during the corner extraction?