Class

VNImageBasedRequest

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

Declaration

@interface VNImageBasedRequest : VNRequest

Overview

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

Topics

Specifying Request Properties

regionOfInterest

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

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.

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.