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# VNTrackTranslationalImageRegistrationRequest

An image-analysis request, as a stateful request you track over time, that determines the affine transform necessary to align the content of two images.

```
class VNTrackTranslationalImageRegistrationRequest
```

## Overview

This request is similar to [`VNTranslationalImageRegistrationRequest`](/documentation/Vision/VNTranslationalImageRegistrationRequest). However, as a [`VNStatefulRequest`](/documentation/Vision/VNStatefulRequest), it automatically computes the registration against the previous frame.

## Topics

### Creating a Translational Image

[`init()`](/documentation/Vision/VNTrackTranslationalImageRegistrationRequest/init())

Creates a new request that tracks the translational registration of two images.

[`init(completionHandler:)`](/documentation/Vision/VNTrackTranslationalImageRegistrationRequest/init(completionHandler:))

Creates a new request that tracks the translational registration of two images, with a system callback on completion.

### Accessing the Results

[`results`](/documentation/Vision/VNTrackTranslationalImageRegistrationRequest/results)

The observed translational image alignment request.


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