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# VNTrajectoryObservation

An observation that describes a detected trajectory.

```
class VNTrajectoryObservation
```

## Topics

### Evaluating an Observation

[`detectedPoints`](/documentation/Vision/VNTrajectoryObservation/detectedPoints)

The centroid points of the detected contour along the trajectory.

[`projectedPoints`](/documentation/Vision/VNTrajectoryObservation/projectedPoints)

The centroids of the calculated trajectory from the detected points.

[`equationCoefficients`](/documentation/Vision/VNTrajectoryObservation/equationCoefficients)

The coefficients of the parabolic equation.

[`movingAverageRadius`](/documentation/Vision/VNTrajectoryObservation/movingAverageRadius)

The moving average radius of the object the request is tracking.


---

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