@w28 or @Alexey,

Can one of you shed light on what sigma0 stands for and how is it calculated? I see that it is OptimizeCameras/sigma0. So does sigma0 represent the standard deviation of the camera parameters (f,cx,cy,k1,k2,k3) in pixels?

How do I interpret this value?

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`2022-07-27 10:25:07 adjusting: xxx- 0.743908 -> 0.449964`

Thanks