Timeline for How do I get the most accurate camera calibration?
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Mar 4, 2013 at 5:35 | comment | added | Martin Beckett | @Santosh - yes that's obviously exactly equivalent. You need to make sure you have covered lots of different angles | |
| Mar 4, 2013 at 4:15 | comment | added | user4059 | @Martin Is it possible to do calibration by keeping the camera at stationery position and changing the chessboard orientation without changing the distance between the camera and chessboard?? | |
| Mar 12, 2012 at 16:20 | comment | added | Cheetah | The autofocus has already been disabled. Define enough? I am trying as extreme angles as I can to pick up the points. Not sure what you mean by "squares going out to the corners", if you mean the function which draws the extracted corners on the image - then yes. I already also have the check to see that all the corners have been detected. I think my problem MAY lie with what I set the initial focal length to in the intrinsic matrix that I pass to the calibration function. I have tried 1:1, 16:9 (what I believe the webcam aspect ratio is) and have also tried NOTHING (which you can do) | |
| Mar 12, 2012 at 16:07 | comment | added | Martin Beckett | @Ben Disable any autofocus. On tiny lens webcams the focal length and lens centre change with focus. Are you rotating enough that it gets a good fit for the centre? Do have squares going out to the corners? Finally check that all the targets have all the squares detected. | |
| Mar 12, 2012 at 12:18 | comment | added | Cheetah | I keep getting really bad calibration and I honestly can't figure out why. I have a printed chessboard on the wall and I am moving the camera to different positions so it has different views on the chessboard but whenever I use the undistort function in opencv and it just comes out very weird and distorted compared to the original. My camera is a Microsoft LifeCam Studio 1080p. | |
| Feb 27, 2012 at 17:59 | history | answered | Martin Beckett | CC BY-SA 3.0 |