---
title: "init(_:frameAnalysisSpacing:)"
framework: vision
role: symbol
role_heading: Initializer
path: "vision/trackhomographicimageregistrationrequest/init(_:frameanalysisspacing:)"
---

# init(_:frameAnalysisSpacing:)

Creates an image-alignment tracking request to determine the warp matrix.

## Declaration

```swift
init(_ revision: TrackHomographicImageRegistrationRequest.Revision? = nil, frameAnalysisSpacing: CMTime? = nil)
```