Apply computer vision algorithms to perform a variety of tasks on input images and video using Vision.

Posts under Vision tag

102 Posts
Sort by:

Post

Replies

Boosts

Views

Activity

When I enter immersive view, the window keeps getting pushed back.
I'm using RealityKit to give an immersive view of 360 pictures. However, I'm seeing a problem where the window disappears when I enter immersive mode and returns when I rotate my head. Interestingly, putting ".glassBackground()" to the back of the window cures the issue, however I prefer not to use it in the UI's backdrop. How can I deal with this? here is link of Gif:- https://firebasestorage.googleapis.com/v0/b/affirmation-604e2.appspot.com/o/Simulator%20Screen%20Recording%20-%20Apple%20Vision%20Pro%20-%202024-01-30%20at%2011.33.39.gif?alt=media&token=3fab9019-4902-4564-9312-30d49b15ea48
0
0
636
Jan ’24
Swift Student Challenge Vision
Hi Developers, I want to create a Vision app on Swift Playgrounds on iPad. However, Vision does not properly function on Swift Playgrounds on iPad or Xcode Playgrounds. The Vision code only works on a normal Xcode Project. SO can I submit my Swift Student Challenge 2024 Application as a normal Xcode Project rather than Xcode Playgrounds or Swift Playgrounds File. Thanks :)
7
0
1.3k
Feb ’24
Is this type of offset even possible with Vision OS?
Hey, I'm working on a UI that a designer created. But he added an object behind the glass, with an offset, pretty much like the cloud in this video: https://dribbble.com/shots/23039991-Weather-Widget-Apple-Vision-Pro-visionOS I tried a couple of methods, but I always ended up clipping my object. So, here's the question: Is there a way to have some object behind the glass panel, but with a slight offset on the x and y?
1
0
464
Jan ’24
vision pro keyboard
I think there is a problem with the keyboard of vision pro. I don't think it's difficult to enter another language. If you're not going to make it, shouldn't Apple provide an extended custom keyboard? Sometimes it's frustrating to see things that are intentionally restricted. If you have any information about vision pro's keyboard or want to discuss it, let's talk about your thoughts together! I don't have any information yet
2
0
729
Feb ’24
Is it possible to create a compass in VisionOS?
I am attempting to create a simple compass for Apple Vision Pro. The method I am familiar with involves using: locationManager.startUpdatingHeading() locationManager(_ manager: CLLocationManager, didUpdateHeading newHeading: CLHeading) However, this does not function on visionOS as 'CLHeading is unavailable in visionOS'. Is there any way to develop this simple compass on visionOS?
1
0
530
Jan ’24
Vision Framework - Text Recognition - Cannot recognize some umlaut diacritics
I am using Vision Framework to recognize text in my app. However, some umlaut diacritics are recognized incorrectly, for example: Grudziński (The incorrect result is: Grudzinski). I already changed language to DE (because my app needs to support DE text) and tried to use VNRecognizeTextRequest#customWord with usesLanguageCorrection but the result still is incorrect. Does Apple provide any APIs to solve this problem? This issue also happens when I open the Gallery on my phone, copy text from images, and paste it to another place.
0
0
374
Jan ’24
VNDetectHumanBodyPose3DRequest Gives Inconsistent Results
I'm currently building an iOS app that requires the ability to detect a person's height with a live video stream. The new VNDetectHumanBodyPose3DRequest is exactly what I need but the observations I'm getting back are very inconsistent and unreliable. When I say inconsistent, I mean the values never seem to settle and they can fluctuate anywhere from 5 '4" to 10'1" (I'm about 6'0"). In terms of unreliable, I have once seen a value that closely matches my height but I rarely see any values that are close enough (within an inch) of the ground truth. In terms of my code, I'm not doing any fancy. I'm first opening a LiDAR stream on my iPhone Pro 14: guard let videoDevice = AVCaptureDevice.default(.builtInLiDARDepthCamera, for: .video, position: .back) else { return } guard let videoDeviceInput = try? AVCaptureDeviceInput(device: videoDevice) else { return } guard captureSession.canAddInput(videoDeviceInput) else { return } captureSession.addInput(videoDeviceInput) I'm then creating an output synchronizer so I can get both image and depth data at the same time: videoDataOutput = AVCaptureVideoDataOutput() captureSession.addOutput(videoDataOutput) depthDataOutput = AVCaptureDepthDataOutput() depthDataOutput.isFilteringEnabled = true captureSession.addOutput(depthDataOutput) outputVideoSync = AVCaptureDataOutputSynchronizer(dataOutputs: [depthDataOutput, videoDataOutput]) Finally, my delegate function that handles the synchronizer is roughly: fileprivate func perform3DPoseRequest(cmSampleBuffer: CMSampleBuffer, depthData: AVDepthData) { let imageRequestHandler = VNImageRequestHandler(cmSampleBuffer: cmSampleBuffer, depthData: depthData, orientation: .up) let request = VNDetectHumanBodyPose3DRequest() do { // Perform the body pose request. try imageRequestHandler.perform([request]) if let observation = request.results?.first { if (observation.heightEstimation == .measured) { print("Body height (ft) \(formatter.string(fromMeters: Double(observation.bodyHeight))) (m): \(observation.bodyHeight)") ... I'd appreciate any help determining how to get accurate results from the observation's bodyHeight. Thanks!
0
0
329
Jan ’24
How to get corresponding pixel from Object Detection
Hey guys! I'm building an app which detects cars via Vision and then retrieves the distance to said car by a synchronized depthDataMap. However, I'm having trouble finding the correct corresponding pixel in that depthDataMap. While the CGRect of the ObjectObservation ranges from 0 - 300 (x) and 0 - 600 (y), The width x height of the DepthDataMap is Only 320 x 180, so I can't get the right corresponding pixel. Any Idea on how to solve this? Kind regards
1
0
544
Feb ’24
Expected Global Sales Start Date for Vision Pro
Currently in South Korea, due to my personal experiences with what seems like warranty but isn't, and the operation of a ruthless Genius Bar, I feel compelled to purchase the officially released Vision Pro. I'd like to discuss with other developers here about their thoughts on the release schedule. The product launched in the USA in February, but I'm curious about the months following for the secondary and tertiary launch countries. Naturally, we'll know the launch is imminent when local staff are summoned to the headquarters for training. However, the urgency for localized services, development, and personal purchase is growing on my mind.
0
0
401
Dec ’23
Issues with VNDetectHumanBodyPose3DRequest iOS 17/Xcode 15
I seem to be having some trouble running the example app from the WWDC 2023 session on 3D Body Pose Detection (this one). I'm getting an issue about the request revision being incompatible, I tried searching the API documentation for any configuration that has been changed or introduced but to no avail. I also couldn't find much online for it. Is this a known issue? Or am I doing something wrong? Error in question: Unable to perform the request: Error Domain=com.apple.Vision Code=16 "VNDetectHumanBodyPose3DRequest does not support VNDetectHumanBodyPose3DRequestRevision1" UserInfo={NSLocalizedDescription=VNDetectHumanBodyPose3DRequest does not support VNDetectHumanBodyPose3DRequestRevision1}. Code Snippet: guard let assetURL = fileURL else { return } let request = VNDetectHumanBodyPose3DRequest() self.fileURL = assetURL let requestHandler = VNImageRequestHandler(url: assetURL) do { try requestHandler.perform([request]) if let returnedObservation = request.results?.first { Task { @MainActor in self.humanObservation = returnedObservation } } } catch { print("Unable to perform the request: \(error).") } Thank you for any and all advice!
1
0
370
Dec ’23
VNRecognizedText returns wrong bounding box
I am trying to parse text from an image, split it into words and store the words in a String array. Additionally I want to store the bounding box of each recognized word. My code works but for some reason the bounding boxes of words that are not separated by a space but by an apostrophe come out wrong. Here is the complete code of my VNRecognizeTextRequestHander: let request = VNRecognizeTextRequest { request, error in guard let observations = request.results as? [VNRecognizedTextObservation] else { return } // split recognized text into words and store each word with corresponding observation let wordObservations = observations.flatMap { observation in observation.topCandidates(1).first?.string.unicodeScalars .split(whereSeparator: { CharacterSet.letters.inverted.contains($0) }) .map { (observation, $0) } ?? [] } // store recognized words as strings recognizedWords = wordObservations.map { (observation, word) in String(word) } // calculate bounding box for each word recognizedWordRects = wordObservations.map { (observation, word) in guard let candidate = observation.topCandidates(1).first else { return .zero } let stringRange = word.startIndex..<word.endIndex guard let rect = try? candidate.boundingBox(for: stringRange)?.boundingBox else { return .zero } let bottomLeftOriginRect = VNImageRectForNormalizedRect(rect, Int(captureRect.width), Int(captureRect.height)) // adjust coordinate system to start in top left corner let topLeftOriginRect = CGRect(origin: CGPoint(x: bottomLeftOriginRect.minX, y: captureRect.height - bottomLeftOriginRect.height - bottomLeftOriginRect.minY), size: bottomLeftOriginRect.size) print("BoundingBox for word '\(String(word))': \(topLeftOriginRect)") return topLeftOriginRect } } And here's an example for what's happening. When I'm processing the following image: the code above produces the following output: BoundingBox for word 'In': (23.00069557577264, 5.718113962610181, 45.89460636656961, 32.78087073878238) BoundingBox for word 'un': (71.19064286904202, 6.289275587192936, 189.16024359557852, 34.392966621800475) BoundingBox for word 'intervista': (71.19064286904202, 6.289275587192936, 189.16024359557852, 34.392966621800475) BoundingBox for word 'del': (262.64622870703477, 8.558512219726875, 54.733978711037985, 32.79967358237818) Notice how the bounding boxes of the words 'un' and 'intervista' are exactly the same. This happens consistently for words that are separated by an apostrophe. Why is that? Thank you for any help Elias
0
0
324
Dec ’23
(Legal-)Restrictions publishing Coin Counter (computer vision)
Hello, I am currently developping an app that counts coins using Computer vision to determine the total value in the picture. However I notice there are no apps in the app store that do anything similar which makes me wonder if there are any restrictions on publishing these types of apps from either apple or governments? I would like to know if it will be possible to launch my app in the European Union once it is finished. Thanks in advance, Guus
0
0
408
Nov ’23
How to attach point cloud(or depth data) to heic?
I'm developing 3D Scanner works on iPad. I'm using AVCapturePhoto and Photogrammetry Session. photoCaptureDelegate is like below: extension PhotoCaptureDelegate: AVCapturePhotoCaptureDelegate { func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) { let fileUrl = CameraViewModel.instance.imageDir!.appendingPathComponent("\(PhotoCaptureDelegate.name)\(id).heic") let img = CIImage(cvPixelBuffer: photo.pixelBuffer!, options: [ .auxiliaryDepth: true, .properties: photo.metadata ]) let depthData = photo.depthData!.converting(toDepthDataType: kCVPixelFormatType_DepthFloat32) let colorSpace = CGColorSpace(name: CGColorSpace.sRGB) let fileData = CIContext().heifRepresentation(of: img, format: .RGBA8, colorSpace: colorSpace!, options: [ .avDepthData: depthData ]) try? fileData!.write(to: fileUrl, options: .atomic) } } But, Photogrammetry session spits warning messages: Sample 0 missing LiDAR point cloud! Sample 1 missing LiDAR point cloud! Sample 2 missing LiDAR point cloud! Sample 3 missing LiDAR point cloud! Sample 4 missing LiDAR point cloud! Sample 5 missing LiDAR point cloud! Sample 6 missing LiDAR point cloud! Sample 7 missing LiDAR point cloud! Sample 8 missing LiDAR point cloud! Sample 9 missing LiDAR point cloud! Sample 10 missing LiDAR point cloud! The session creates a usdz 3d model but scale is not correct. I think the point cloud can help Photogrammetry session to find right scale, but I don't know how to attach point cloud.
1
2
685
Jul ’24
Object recognition and tracking on visionOS
Hello! I would like to develop a visionOS application that tracks a single object in a user's environment. Skimming through the documentation I found out that this feature is currently unsupported in ARKit (we can only recognize images). But it seems it should be doable by combining CoreML and Vision frameworks. So I have a few questions: Is it the best approach or is there a simpler solution? What is the best way to train a CoreML model without access to the device? Will videos recorded by iPhone 15 be enough? Thank you in advance for all the answers.
1
0
675
Nov ’23
iOS Xcode - ABPKPersonIDTracker not supported on this device
I am trying to use Vision framework in iOS but getting below error in logs. Not able to find any resources in Developer Forums. Any help would be appreciated! ABPKPersonIDTracker not supported on this device Failed to initialize ABPK Person ID Tracker public func runHumanBodyPose3DRequest() { let request = VNDetectHumanBodyPose3DRequest() let requestHandler = VNImageRequestHandler(url: filePath!) do { try requestHandler.perform([request]) if let returnedObservation = request.results?.first { self.humanObservation = returnedObservation print(humanObservation) } } catch let error{ print(error.localizedDescription) } }
3
0
772
Nov ’23