Class

VNGenerateImageFeaturePrintRequest

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

Declaration

@interface VNGenerateImageFeaturePrintRequest : VNImageBasedRequest

Overview

This request returns an array of feature print elements in the form of data wrapped in VNFeaturePrintObservation objects.

Topics

Scaling and Cropping Images

imageCropAndScaleOption

An optional setting informing the Vision algorithm how to scale an input image before generating the feature print.

VNImageCropAndScaleOption

An enumeration of different ways Vision can crop and scale an input image.

Specifying Algorithm Revision

VNGenerateImageFeaturePrintRequestRevision1

A constant for specifying revision 1 of the feature print algorithm.

Relationships

Inherits From

See Also

Still Image Analysis

Detecting Objects in Still Images

Locate and demarcate rectangles, faces, barcodes, and text in images using the Vision framework.

VNImageRequestHandler

An object that processes one or more image analysis requests pertaining to a single image.

VNImageBasedRequest

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

VNClassifyImageRequest

A request to classify an image.

VNRequest

The abstract superclass for analysis requests.

VNObservation

The abstract superclass for analysis results.