Class

VNFeaturePrintObservation

The observation resulting from a VNGenerateImageFeaturePrintRequest.

Declaration

@interface VNFeaturePrintObservation : VNObservation

Overview

The observations returned from a VNGenerateImageFeaturePrintRequest are of this class.

Topics

Fetching Feature Print Data

data

The feature print data.

elementCount

The total number of elements in the data.

Determining Types of Feature Prints

VNElementType

An enumeration of the type of element in feature print data.

VNElementTypeSize

The size of a feature print element.

elementType

The type of each element in the data.

Computing Distance Between Features

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.

VNGenerateImageFeaturePrintRequest

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

VNRequest

The abstract superclass for analysis requests.

VNObservation

The abstract superclass for analysis results.