# ImageProcessingRequest A type for image-analysis requests that focus on a specific part of an image. ``` protocol ImageProcessingRequest : VisionRequest ``` ## Topics ### Setting the region [`var regionOfInterest: NormalizedRect`](/documentation/Vision/ImageProcessingRequest/regionOfInterest) The region of the image where the framework performs the 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. ## Relationships ### Conforming Types [`DetectFaceCaptureQualityRequest`](/documentation/Vision/DetectFaceCaptureQualityRequest) [`DetectHumanBodyPoseRequest`](/documentation/Vision/DetectHumanBodyPoseRequest) [`RecognizeDocumentsRequest`](/documentation/Vision/RecognizeDocumentsRequest) [`DetectBarcodesRequest`](/documentation/Vision/DetectBarcodesRequest) [`GenerateImageFeaturePrintRequest`](/documentation/Vision/GenerateImageFeaturePrintRequest) [`GenerateForegroundInstanceMaskRequest`](/documentation/Vision/GenerateForegroundInstanceMaskRequest) [`GenerateIterativeSegmentationRequest`](/documentation/Vision/GenerateIterativeSegmentationRequest) [`DetectTrajectoriesRequest`](/documentation/Vision/DetectTrajectoriesRequest) [`DetectContoursRequest`](/documentation/Vision/DetectContoursRequest) [`RecognizeAnimalsRequest`](/documentation/Vision/RecognizeAnimalsRequest) [`GeneratePersonSegmentationRequest`](/documentation/Vision/GeneratePersonSegmentationRequest) [`TrackOpticalFlowRequest`](/documentation/Vision/TrackOpticalFlowRequest) [`TrackHomographicImageRegistrationRequest`](/documentation/Vision/TrackHomographicImageRegistrationRequest) [`GeneratePersonInstanceMaskRequest`](/documentation/Vision/GeneratePersonInstanceMaskRequest) [`DetectLensSmudgeRequest`](/documentation/Vision/DetectLensSmudgeRequest) [`DetectRectanglesRequest`](/documentation/Vision/DetectRectanglesRequest) [`DetectHumanHandPoseRequest`](/documentation/Vision/DetectHumanHandPoseRequest) [`RecognizeTextRequest`](/documentation/Vision/RecognizeTextRequest) [`DetectHumanBodyPose3DRequest`](/documentation/Vision/DetectHumanBodyPose3DRequest) [`DetectHumanRectanglesRequest`](/documentation/Vision/DetectHumanRectanglesRequest) [`CoreMLRequest`](/documentation/Vision/CoreMLRequest) [`DetectFaceLandmarksRequest`](/documentation/Vision/DetectFaceLandmarksRequest) [`TrackRectangleRequest`](/documentation/Vision/TrackRectangleRequest) [`GenerateObjectnessBasedSaliencyImageRequest`](/documentation/Vision/GenerateObjectnessBasedSaliencyImageRequest) [`DetectDocumentSegmentationRequest`](/documentation/Vision/DetectDocumentSegmentationRequest) [`GenerateAttentionBasedSaliencyImageRequest`](/documentation/Vision/GenerateAttentionBasedSaliencyImageRequest) [`DetectTextRectanglesRequest`](/documentation/Vision/DetectTextRectanglesRequest) [`DetectFaceRectanglesRequest`](/documentation/Vision/DetectFaceRectanglesRequest) [`DetectHorizonRequest`](/documentation/Vision/DetectHorizonRequest) [`ClassifyImageRequest`](/documentation/Vision/ClassifyImageRequest) [`TrackTranslationalImageRegistrationRequest`](/documentation/Vision/TrackTranslationalImageRegistrationRequest) [`CalculateImageAestheticsScoresRequest`](/documentation/Vision/CalculateImageAestheticsScoresRequest) [`DetectAnimalBodyPoseRequest`](/documentation/Vision/DetectAnimalBodyPoseRequest) [`TrackObjectRequest`](/documentation/Vision/TrackObjectRequest) ### Inherits From [`Sendable`](/documentation/Swift/Sendable) [`VisionRequest`](/documentation/Vision/VisionRequest) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`Equatable`](/documentation/Swift/Equatable) [`Hashable`](/documentation/Swift/Hashable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) --- Copyright © 2026 Apple Inc. 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