# Kalman filter matrices

Hi,

I'm working with a kalman filter but I can't figure out or can't find documentation about the different matrices. I'm wondering what the values of the next matrices must be:

```
setIdentity(KF.measurementMatrix);
setIdentity(KF.processNoiseCov, Scalar::all(1e-5));
setIdentity(KF.measurementNoiseCov, Scalar::all(1e-1));
setIdentity(KF.errorCovPost, Scalar::all(1));
```

Thanks!

You can find an example here or here