---
title: "VisionResult.trackOpticalFlow(_:_:)"
framework: vision
role: symbol
role_heading: Case
path: "vision/visionresult/trackopticalflow(_:_:)"
---

# VisionResult.trackOpticalFlow(_:_:)

A result from performing a track optical flow request.

## Declaration

```swift
case trackOpticalFlow(TrackOpticalFlowRequest, OpticalFlowObservation?)
```

## See Also

### Getting the optical flow, rectangle and barcode detection result

- [VisionResult.detectRectangles(_:_:)](vision/visionresult/detectrectangles(_:_:).md)
- [VisionResult.detectBarcodes(_:_:)](vision/visionresult/detectbarcodes(_:_:).md)