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hengli / camodocal

CamOdoCal: Automatic Intrinsic and Extrinsic Calibration of a Rig with Multiple Generic Cameras and Odometry
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Cata Camera calibration large gamma #24

Closed inspirit closed 9 years ago

inspirit commented 9 years ago

Hello,

i was trying to calibrate the camera using Cata (MEI) model. how ever it results in very large gamma values (focal X/Y): 3000+ trying different models like Pinhole gives adequate focal values. what can be the reason for such results?

hengli commented 9 years ago

Usually large gamma values come with large radial distortion values. I have noticed a strong positive correlation between gamma and radial distortion coefficients; I think that there is one redundant intrinsic calibration parameter. To remove the redundancy, we can set the first-order radial distortion parameter to 0, and keep it constant throughout.