An object that processes one or more image analysis requests pertaining to a single image.
SDKs
Framework
class VNImageRequestHandler : NSObject
Instantiate this handler to perform Vision requests on a single image. You specify the image and, optionally, a completion handler at the time of creation, and call perform(_:) to begin executing the request.
init(cgCreates a handler to be used for performing requests on Core Graphics images.
init(cgCreates a handler to be used for performing requests on a Core Graphics image with known orientation.
init(ciCreates a handler to be used for performing requests on CIImage data.
init(ciCreates a handler to be used for performing requests on CIImage data of a known orientation.
init(cvCreates a handler to be used for performing requests on a Core Video pixel buffer.
init(cvCreates a handler to be used for performing requests on a Core Video pixel buffer of a known orientation.
init(data: Data, options: [VNImageCreates a handler to be used for performing requests on an image contained in an NSData object.
init(data: Data, orientation: CGImageCreates a handler to be used for performing requests on an image of known orientation, contained in an NSData object.
init(url: URL, options: [VNImageCreates a handler to be used for performing requests on an image at the specified URL.
init(url: URL, orientation: CGImageCreates a handler to be used for performing requests on an image with known orientation, at the specified URL.
func perform([VNRequest])Schedules Vision requests to be performed.
struct VNImageAn option key passed into VNImage creations or requests that take an auxiliary image.
Locate and demarcate rectangles, faces, barcodes, and text in images using the Vision framework.
Analyze and label images using a Vision classification request.
Generate a feature print to compute distance between images.
class VNImageThe abstract superclass for image analysis requests that focus on a specific part of an image.
class VNClassifyA request to classify an image.
class VNFeatureThe observation resulting from a VNGenerate.
class VNGenerateAn image-based request to generate feature prints from an image.
class VNRequestThe abstract superclass for analysis requests.
class VNObservationThe abstract superclass for analysis results.