tlhedrick
commented
2 years ago Hi Lionel,
5 points is actually not enough to compute the 11 DLT coefficients; you need a minimum of 6 points. Duplicating some of the points to bring the count up to 11 won't solve the underlying issue, though you may get a more interesting error message! Probably the best option is to add 2 to 3 additional points that are at the midpoint of the line between some of the pre-existing points, since you can probably identify that location even if there is no marker. I'll see about adding a more informative error message in a future version!
Does that make sense, or did I mis-interpret your issue?
Cheers, Ty Hedrick
On 2/9/2022 11:51 AM, Lionel Feugère wrote:
Dear Tyson,
Thank you very much for this great piece of code.
I’m trying to calibrate 3 cameras using 5 points only. I manage to initialize the calibration with a 5point calibration CSV file, I get the message ‘Loaded 5 point calibration object specification file’, but once I’m finished with the selection of the 5 points on the first camera, I cannot add the other camera images. The button ‘Initialize’ remains grey and does not change to “Add a camera” as when I have a 11 point calibration file instead.
Is there any reason for not allowing a calibration with 5 points only?
Do you see any issue in making CSV file which points are duplicated in order to have (artificially) 11 points, e.g. {pt1, pt1, pt2, p2, p3, p3, p4, p4, p5, p5, p5} instead of {p1, p2, p3, p4, p5} ?
Version: Application for Mac (DLTdv8a_v8p2p3).
Kind regards, Lionel
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liofeu
Dear Tyson,
Thank you very much for this great piece of code.
I’m trying to calibrate 3 cameras using 5 points only. I manage to initialize the calibration with a 5point calibration CSV file, I get the message ‘Loaded 5 point calibration object specification file’, but once I’m finished with the selection of the 5 points on the first camera, I cannot add the other camera images. The button ‘Initialize’ remains grey and does not change to “Add a camera” as when I have a 11 point calibration file instead.
Is there any reason for not allowing a calibration with 5 points only?
Do you see any issue in making CSV file which points are duplicated in order to have (artificially) 11 points, e.g. {pt1, pt1, pt2, p2, p3, p3, p4, p4, p5, p5, p5} instead of {p1, p2, p3, p4, p5} ?
Version: Application for Mac (DLTdv8a_v8p2p3).
Kind regards, Lionel