---
title: inputObservation
framework: vision
role: symbol
role_heading: Instance Property
path: vision/trackrectanglerequest/inputobservation
---

# inputObservation

The object to track.

## Declaration

```swift
final let inputObservation: any QuadrilateralProviding & VisionObservation
```

## See Also

### Configuring a request

- [QuadrilateralProviding](vision/quadrilateralproviding.md)
- [trackingLevel](vision/trackrectanglerequest/trackinglevel-swift.property.md)
- [TrackRectangleRequest.TrackingLevel](vision/trackrectanglerequest/trackinglevel-swift.enum.md)