I am getting very high radial distortion coefficients after calibration which is unusual for the type of lense I’m using. When I try to reconstruct speckled squares/rectangles I get ~10% compression in X (horizontal) direction. However, the Y direction measurement is very accurate (<1% error). I am trying to build a 3D Digital Image Correlation setup and using two Tokina atx-i 100mm f/2.8 FF Macro Lenses with Megaspeed MS55K high speed cameras. The calibration file and images can be found in the link below. I’d appreciate any suggestions for overcoming this problem.
Drive
inaccessible
bad luck with calibration usually comes from bad data.
low repro error is necessary but not sufficient. if it’s high, the data is junk for sure. if it’s low, the data can still be junk.
Sorry for the inaccessible link earlier. Can you please try this link
There is definitely something wrong in the images. However, I can’t figure out the problem. The calibration software can detect the intersection points. The repro error is 0.3 px.
yep, you’re showing the board head-on. that’s the issue.
tilt it out of plane.
and try to get the board into the corners of the view.
I linked to a best practices article on calib.io. review it once more.