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# GenerateImageFeaturePrintRequest

An image-based request to generate feature prints from an image.

```
struct GenerateImageFeaturePrintRequest
```

## Overview

This request generates an [`FeaturePrintObservation`](/documentation/Vision/FeaturePrintObservation) object with the features in an image.

## Topics

### Creating a request

[`init(GenerateImageFeaturePrintRequest.Revision?)`](/documentation/Vision/GenerateImageFeaturePrintRequest/init(_:))

Creates an image-feature print request.

### Performing a request

[`func perform(on: URL, orientation: CGImagePropertyOrientation?) async throws -> Self.Result`](/documentation/Vision/ImageProcessingRequest/perform(on:orientation:)-80bya)

Performs the request on an image URL and produces observations.

[`func perform(on: Data, orientation: CGImagePropertyOrientation?) async throws -> Self.Result`](/documentation/Vision/ImageProcessingRequest/perform(on:orientation:)-3f3f1)

Performs the request on image data and produces observations.

[`func perform(on: CGImage, orientation: CGImagePropertyOrientation?) async throws -> Self.Result`](/documentation/Vision/ImageProcessingRequest/perform(on:orientation:)-qxxx)

Performs the request on a Core Graphics image and produces observations.

[`func perform(on: CVPixelBuffer, orientation: CGImagePropertyOrientation?) async throws -> Self.Result`](/documentation/Vision/ImageProcessingRequest/perform(on:orientation:)-xspx)

Performs the request on a pixel buffer and produces observations.

[`func perform(on: CMSampleBuffer, orientation: CGImagePropertyOrientation?) async throws -> Self.Result`](/documentation/Vision/ImageProcessingRequest/perform(on:orientation:)-3hddl)

Performs the request on a Core Media buffer and produces observations.

[`func perform(on: CIImage, orientation: CGImagePropertyOrientation?) async throws -> Self.Result`](/documentation/Vision/ImageProcessingRequest/perform(on:orientation:)-85ex1)

Performs the request on a Core Image image and produces observations.

### Understanding the result

[`struct FeaturePrintObservation`](/documentation/Vision/FeaturePrintObservation)

An observation that provides the recognized feature print.

### Configuring a request

[`var cropAndScaleAction: ImageCropAndScaleAction`](/documentation/Vision/GenerateImageFeaturePrintRequest/cropAndScaleAction)

An optional setting that tells the algorithm how to scale an input image before generating the result.

[`enum ImageCropAndScaleAction`](/documentation/Vision/ImageCropAndScaleAction)

A scale to apply to an input image before performing a request.

### Getting the revision

[`let revision: GenerateImageFeaturePrintRequest.Revision`](/documentation/Vision/GenerateImageFeaturePrintRequest/revision-swift.property)

The algorithm or implementation the request uses.

[`static let supportedRevisions: [GenerateImageFeaturePrintRequest.Revision]`](/documentation/Vision/GenerateImageFeaturePrintRequest/supportedRevisions)

The collection of revisions the request supports.

[`enum Revision`](/documentation/Vision/GenerateImageFeaturePrintRequest/Revision-swift.enum)

A type that describes the algorithm or implementation that the request performs.

## Relationships

### Conforms To

[`VisionRequest`](/documentation/Vision/VisionRequest)

[`Hashable`](/documentation/Swift/Hashable)

[`Equatable`](/documentation/Swift/Equatable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`ImageProcessingRequest`](/documentation/Vision/ImageProcessingRequest)

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

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