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# VNImageBasedRequest

The abstract superclass for image-analysis requests that focus on a specific part of an image.

```
class VNImageBasedRequest
```

## Overview

Other Vision request handlers that operate on still images inherit from this abstract base class. Don’t use it directly.

## Topics

### Configuring a Request

[`regionOfInterest`](/documentation/Vision/VNImageBasedRequest/regionOfInterest)

The region of the image in which Vision will perform the request.


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