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Author Topic: what do the red and blue marks mean for lens calibration  (Read 144 times)

mpatalberta

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what do the red and blue marks mean for lens calibration
« on: March 16, 2019, 01:34:35 AM »
Hello,
I have run the agisoft lens calibration with the supplied agisoft checker board.
What does the red and blue marks mean on each of the camera checker box picture after lens calibration?
How can I see the affect of the lens calibration on the checker board images?
Thanks,
Patrick,

Alexey Pasumansky

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Re: what do the red and blue marks mean for lens calibration
« Reply #1 on: March 19, 2019, 04:14:27 PM »
Hello Patrick,

Blue and red marks after the Lens calibration operation on the source images represent the detected corners of the checkerboard pattern.

It's important to check that no same color circles are neighbors (connected with the single side of the rectangle).

White circles that may be also observed, represent ignored/invalid corners.

The resulting distortion coefficients can be reviewed in the Tools Menu -> Camera Calibration dialog -> Adjusted tab.
Best regards,
Alexey Pasumansky,
AgiSoft LLC

mpatalberta

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Re: what do the red and blue marks mean for lens calibration
« Reply #2 on: March 19, 2019, 06:46:32 PM »
Alexey,

Just so I understand correctly the Blue and Red marks indicate where the corners of the checker box would go if the lens correction coefficients are applied.

Is my statement above correct?
Thanks,
Patrick Brown