(Note: this is part 1 of a 3 part posting. See Part 2 or Part 3)
At WWDC25 we launched a new type of Lab event for the developer community - Group Labs. A Group Lab is a panel Q&A designed for a large audience of developers. Group Labs are a unique opportunity for the community to submit questions directly to a panel of Apple engineers and designers. Here are the highlights from the WWDC25 Group Lab for Camera & Photos.
WWDC25 Camera & Photos group lab ran for one hour at 6 PM PST on Tuesday June 10th, 2025
Introductory kick-off questions
Question 1
Tell us a little about the new AVFoundation Capture APIs we've made available in the new iOS 26 developer preview?
Cinematic Capture API (strong/weak focus, tracking focus)(scene monitoring)(simulated aperture)(dog/cat heads/groupIDs)
Camera Controls and AirPod Stem Clicks
Spatial Audio and Studio Quality AirPod Mics in Camera
Lens Smudge Detection
Exposure and Focus Rect of Interest
Question 2
I built QR code scanning into my app, but on newer iPhones I have to hold the phone very far away from the QR code, otherwise the image is blurry and it doesn't scan. Why is this happening and how can I fix it?
Every year, the cameras get better and better as we push the state of the art on iPhone photography and videography. This sometimes results in changes to the characteristics of the lenses.
min focus distance
newer phones have multiple lenses
automatic switching behavior
Use virtual device like the builtInDualWide or built in Triple, rather than just the builtInWide
Set the videoZoomFactor to 2. You're done.
Question 3
Last year, we saw some exciting new APIs introduced in AVFoundation in the health space. With Constant Color photography, developers can take pictures that have constant color regardless of ambient lighting. There are some further advancements this year. Davide, could you tell us about them?
constant color photography is mean to remove the "tone mapping" applied to photograph captured with camera app, usually incldsuing artistic intent, and instead try to be a close as possible to the real color of the scene, regardless of the illumination
constant color images could be captured in HEIF anf JPEG laste year. this year we are adding Support for the DICOM medical imaging photo format. It is a fomrat used by the health industry to store images related to medical subjects like MRI, skin problems, xray and so on.
It's writable and also readable format on all OS26, supported through AVCapturePhotoOutput APIs and through the coregraphics api.
for coregrapphics there is a new DICOM entry in the property dictionary which includes all the dicom availbale and defined propertie in a file. finder will also display all those in the info panel
(Address why a developer would want to use it) - not for regualr picture taking apps. for those HEIF and JPEG are the preferred delivery format. use dicom if your app produces output that are health related, that you can also share with health providers or your doctors
Main session developer questions
Question 1
LiDAR vs. Dual Camera depth generation: Which resolution does the LiDAR sensor natively have (iPhone 16 Pro) and when to prefer LiDAR over Dual Camera?
Both report formats with output resolutions (we don't advertise sensor resolution)
Lidar vs Dual, etc:
Lidar: Best for absolute depth, real world scale and computer vision
Dual, etc: relative, disparity-based, less power, photo effects
Also see: 2022 WWDC session "Discovery advancements in iOS camera capture: Depth, focus and multitasking"
Question 2
Can true depth and lidar camera run at 60fps?
Lidar can do 30fps (edited)
Front true depth can do 60fps.
Question 3
What’s the first class way to use PhotoKit to reimplement a high performance photo grid? We’ve been using a LazyVGrid and the photos caching manager, but are never able to hit the holy trinity (60hz, efficient memory footprint, minimal flashes of placeholder/empty cells)
use the PHCachingImageManager to get media content delivered before you need to display it
specify the size you need for grid sized display
set the options PHVideoRequestOptionsDeliveryModeFastFormat, PHImageRequestOptionsDeliveryModeFastFormat and PHImageRequestOptionsResizeModeFast
Question 4
For rending live preview of video stream, Is there performance overhead from using async and Swift UI for image updates vs UIViewRepresentable + AVCaptureVideoPreviewLayer.self?
AVCaptureVideoPreviewLayer is the most efficient display path
Use VDO + AVSampleBufferDisplayLayer if you need to modify the image data
Swift UI image is optimized for static image content
Question 5
Is there a way to configure the AVFoundation BuiltInLiDarDepthCamera mode to provide a depth map as accurate as ARKit at close range?
The AVCaptureDepthDataOutput supports filtering that reduces noise and fills in invalid values. Consider using this for smoother depth maps
Question 6
Pyramid-based photo editing in core image (such as adobe camera raw highlights and shadows)?
First off you may want to look a the builtin filter called CIHighlightShadowAdjust
Also the noise reduction in the CIRawFilter uses a pyramid-based algorithm.
You can also write your own pyramid-based algorithms by taking an input image:
down sample it by two multiply times using imageByApplyingAffineTransform
apply additional CIKernels to each downsampled image as needed.
use a custom CIKernel to combine the results.
Question 7
Is the best way to integrate an in-app camera for a “non-camera” app UIImagePickerController?
Yes, UIImagePickerController provides system-provided UI for capturing photos and movies.
Question 8
Hello, my question is on Deferred Photo Processing? Say I have a photo capture app that adds a CIFilter to the capture. How can I take advantage of Deferred Photo Processing? Since I don’t know how to detect when the deferred captured photo is ready
CIFilter can be called on the final at that point
Photo will have to be re-inserted into the Photo library as adjustment
Question 9
For shipping photo style assets in the app that need transparency what is the best format to use? JPEG2000? will moving to this save a lot of space comapred to PNG or other options?
If you want lossless compression PNG is good and supports unpremutiplied alpha
If you want lossy compression HEIF supports premutiplied or unpremutiplied alpha
(Note: this is part 1 of a 3 part posting. See Part 2 or Part 3)
Photos & Camera
RSS for tagExplore technical aspects of capturing high-quality photos and videos, including exposure control, focus modes, and RAW capture options.
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(Note: this is part 2 of a 3 part posting. See Part 1 or Part 3)
At WWDC25 we launched a new type of Lab event for the developer community - Group Labs. A Group Lab is a panel Q&A designed for a large audience of developers. Group Labs are a unique opportunity for the community to submit questions directly to a panel of Apple engineers and designers. Here are the highlights from the WWDC25 Group Lab for Camera & Photos.
WWDC25 Camera & Photos group lab ran for one hour at 6 PM PST on Tuesday June 10th, 2025
Question 10
Can we directly integrate auto-capture triggers (e.g., when image is steady or text is detected) using Vision and AVFoundation?
Yes apps can use AVCaptureSession's VDO + AVCapturePhotoOutput, run vision on VDO buffers and capture photo when certain scene or text is detected.
Just to be careful to run Vision on VDO buffers async so it doesn't cause frame drops.
Question 11
What Camera or Photos framework features support working with images from external media, like connected cameras or SD cards? Any best practices?
The ImageCaptureCore framework supports camera devices, memory cards, scanners
read and write, where supported
check out the docs to see how to browse connected devices, folders, files, etc.
Question 12
Hi Brad, to follow up on your SwiftUI cautionary note: using AVCaptureVideoPreview inside a UIViewRepresentable, is okay, right? Thanks all for the great info!
Yes, this is totally fine.
AppKit or UIKit views inside appropriate SwiftUI representables should be equivalent performance
Question 13
What’s the “right” way to transition media in my photos app between HDR modes? When I’m in a one-up view, we use HDR, but in other contexts (like thumbnail) we don’t want HDR. Is there a nice way to tone map?
There’s a suite of new System Tone Mapper APIs in this years’ OSes
CoreImage ImageKit CoreAnimation, CoreGraphics
For example:
CoreImage: new CISystemToneMap filter.
CoreAnimation: layer.preferredDynamicRange = CADynamicRangeConstrainedHigh
Using image views (NSImageView/UIImageView/SwiftUI Image/CALayer) support animations on preferredDynamicRange
Can go from high to constrained to standard
Tone mapping is provided by the system (CISystemToneMap for controllable example)
Question 14
What is your recommendation to preprocess and upscale your depth map in order to render a realistic portrait mode image?
One way to do this: the CIEdgePreserveUpsample CIFilter can be use to upsample a lower resolution depth map by using a higher resolution RGB image as a guide.
Question 15
For buffering frames for later processing from real-time camera output should we prefer a AVSampleBufferDisplayLayer centered approach or AVCaptureVideoDataOutputSampleBufferDelegate centered approach? When would we use each?
AVSampleBufferDisplayLayer and AVCaptureVideoDataOutputSampleBufferDelegate are used hand in hand for custom camera preview.
For buffering for later processing, ensure you make copies of VDO buffers to not drop frames from the output
Question 16
Hello, my question is on Deferred Photo Processing? Say I have a photo capture app that adds a CIFilter to the capture. How can I take advantage of Deferred Photo Processing? Since I don’t know how to detect when the deferred captured photo is ready
CIFilter can be called on the final at that point
Photo will have to be re-inserted into the Photo library as adjustment
Question 17
Is digital zoom (e.g., 1.5x) before taking a photo the same as cropping the photo afterward?
digital zoom upscales the image to output dimensions and cropping will yield a smaller output image
while digital zoom will crop, it also upscales
Question 18
How do you design camera interfaces that work for both casual users and photography enthusiasts?
Progressive disclosure: Put the most common controls up front, and make it easy for pros to drill down.
Sensible Defaults: Choose defaults that work well for casual users, but allow those defaults to be modified for photography enthusiasts
A good philosophy is: Keep the simple things easy, make the hard things possible
Question 19
Recent iPhone models introduced macro mode which automatically switch between lenses to take into account of the focal distance difference. Is there official API to implement this, or should I implement them myself using LiDAR values.
Using builtInTripleCamera and builtInDualWideCamera will automatically switch to macro when available
Question 20
a couple of years ago at WWDC, the option of replacing a camera with a virtual camera was mentioned. How does one do that - make the “physical” camera effectively disappear, so only the virtual camera is accessible to the user?
You can't prevent the built-in camera from being available to the user
Question 21
Can developers now integrate custom Core ML models with Vision for on-device photo analysis more seamlessly?
Yes they can, use CoreMLRequest , provide their model container
Been supported for a while (iOS 18/macOS 15)
For more details go to Machine Learning & AI group lab Thursday
use smaller images for better performance
Question 22
What would you recommend for capture of the new immersive and spatial formats?
To capture Spatial Video use AVCaptureMovieFileOutput’s spatialVideoCaptureEnabled property
Not all device formats support spatial capture, check AVCaptureDevice.activeFormat.spatialVideoCaptureSupported
See WWDC 2024 talk “Build compelling spatial photo and video experiences” for more details
Question 23
You mentioned JPEG-XL. What is the current status of support on iOS and macOS for encoding and decoding?
For decoding, we support JPEG-XL files in all our OSes, regular SDR files, as well as ISO HDR files.
For encoding, we only support JPEG-XL for ProRAW DNG capture in the Camera app or via third-party AVFoundation APIs.
If you have any requests for improvement or new features related to JPEG-XL, please file a Feedback request using the Feedback Assistant.
(Note: this is part 2 of a 3 part posting. See Part 1 or Part 3)
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Image I/O
Photos and Imaging
PhotoKit
Core Image
(Note: this is part 3 of a 3 part posting. See Part 1 or Part 2)
At WWDC25 we launched a new type of Lab event for the developer community - Group Labs. A Group Lab is a panel Q&A designed for a large audience of developers. Group Labs are a unique opportunity for the community to submit questions directly to a panel of Apple engineers and designers. Here are the highlights from the WWDC25 Group Lab for Camera & Photos.
WWDC25 Camera & Photos group lab ran for one hour at 6 PM PST on Tuesday June 10th, 2025
Question 24
What’s the best approach for optimizing barcode scanning using AVFoundation or Vision in low-light or angled scenarios
Turn on flash in low-light scenarios
Lower framerate to improve exposure and reduce noise
Wait until the capture is in focus/notify your user that they need to get closer
Question 25
Recent iPhone models introduced macro mode which automatically switch between lenses to take into account of the focal distance difference. Is there official API to implement this, or should I implement them myself using LiDAR values.
Using builtInTripleCamera and builtInDualWideCamera will automatically switch to macro when available
Question 26
Is there a way to quickly create a thumbnail after the user selects an image with PhotosPicker?
File provider API
Additional questions from the WWDC25 in-person labs that occurred later in the WWDC week
Question 1
When should I build my custom photo picker instead of using the system one?
Always start with the system picker -> try embeddable customization APIs -> fallback to custom picker for very special needs
Question 2
I'm building a new camera app for pros and I want to give my users the most un-processed image possible, and the most control over the capture as possible. How can I do that with AVCapture?
If stills, Brief Bayer RAW capture overview, or Pro RAW if you want Apple's processing and dynamic range
If video, talk about prores LOG.
Custom exposure settings are available throguh the apis
maybe global/local tonemapping discussion?
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Image I/O
Photos and Imaging
PhotoKit
Core Image
I'm a new app developer and am trying to add a button that adds pictures from the photo library AND camera. I added the first function (adding pictures from the photo library) using the new-ish photoPicker, but I can't find a way to do the same thing for the camera. Should I just tough it out and use the UI View Controller struct that I've seen in all of the YouTube tutorials I've come across?
I also want the user to be able to crop the picture in the app after they take a picture.
Thanks in advance
Hi all,
we are in the business of scanning documents and barcodes with the camera system of mobile devices. Since there is a wide variety of use cases, from scanning tiniest barcodes and small business cards to scanning barcodes or large documents from far distances we preferably rely on the triple camera devices, if available, with automatic constituent device switching.
This approach used to be working perfectly fine. Depending on the zoom level (we prefer to use an initial zoom value of 2.0) and the focusing distance the iPhone Pro models switched through the different camera systems at light speed: from ultra-wide to wide, tele and back. No issues at all.
Unfortunately the new iPhone 16 Pro models behave very different when it comes to constituent device switching based on focus distance. The switching is slow and sometimes it does not happen at all when the focusing distance changes. Especially when aiming for a at a distant object for a longer time and then aiming at a very close object that is maybe 2" away. The iPhone 15 Pro here always switches immediately to the ultra-wide camera, while the iPhone 16 Pro takes at least 2-3 seconds, in rare cases up to 10 seconds and sometimes forever to switch to the ultra-wide camera.
Of course we assumed that our code is responsible for these issues. So we experimented with restricting the devices and so on. Then we stripped more and more configuration code but nothing we tried improved the situation.
So we ended up writing a minimal example app that demonstrates the problem. You can find the code below. Execute it on various iPhones and aim at far distance (> 10 feet) and then quickly to very close distance (<5 inches).
Here is a list of devices and our test results:
iPhone 15 Pro, iOS 17.6: very fast and reliable switching
iPhone 15 Pro, iOS 18.1: very fast and reliable switching
iPhone 13 Pro Max, iOS 15.3: very fast and reliable switching
iPhone 16 (dual-wide camera), iOS 18.1: very fast and reliable switching
iPhone 16 Pro, iOS 18.1: slow switching, unreliable
iPhone 16 Pro Max, iOS 18.1: slow switching, unreliable
Questions:
Does anyone else have seen this issue? And possibly found a workaround?
Is this behaviour intended on iPhone 16 Pro models? Can we somehow improve the switching speed?
Further the iPhone 16 Pro models also show a jumping preview in the preview layer when they switch the constituent active device. Not dramatic, but compared to the other phones it looks like a glitch.
Thank you very much!
Kind regards,
Sebastian
import UIKit
import AVFoundation
class ViewController: UIViewController {
var captureSession : AVCaptureSession!
var captureDevice : AVCaptureDevice!
var captureInput : AVCaptureInput!
var previewLayer : AVCaptureVideoPreviewLayer!
var activePrimaryConstituentToken: NSKeyValueObservation?
var zoomToken: NSKeyValueObservation?
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
checkPermissions()
setupAndStartCaptureSession()
}
func checkPermissions() {
let cameraAuthStatus = AVCaptureDevice.authorizationStatus(for: AVMediaType.video)
switch cameraAuthStatus {
case .authorized:
return
case .denied:
abort()
case .notDetermined:
AVCaptureDevice.requestAccess(for: AVMediaType.video, completionHandler:
{ (authorized) in
if(!authorized){
abort()
}
})
case .restricted:
abort()
@unknown default:
fatalError()
}
}
func setupAndStartCaptureSession() {
DispatchQueue.global(qos: .userInitiated).async{
self.captureSession = AVCaptureSession()
self.captureSession.beginConfiguration()
if self.captureSession.canSetSessionPreset(.photo) {
self.captureSession.sessionPreset = .photo
}
self.captureSession.automaticallyConfiguresCaptureDeviceForWideColor = true
self.setupInputs()
DispatchQueue.main.async {
self.setupPreviewLayer()
}
self.captureSession.commitConfiguration()
self.captureSession.startRunning()
self.activePrimaryConstituentToken = self.captureDevice.observe(\.activePrimaryConstituent, options: [.new], changeHandler: { (device, change) in
let type = device.activePrimaryConstituent!.deviceType.rawValue
print("Device type: \(type)")
})
self.zoomToken = self.captureDevice.observe(\.videoZoomFactor, options: [.new], changeHandler: { (device, change) in
let zoom = device.videoZoomFactor
print("Zoom: \(zoom)")
})
let switchZoomFactor = 2.0
DispatchQueue.main.async {
self.setZoom(CGFloat(switchZoomFactor), animated: false)
}
}
}
func setupInputs() {
if let device = AVCaptureDevice.default(.builtInTripleCamera, for: .video, position: .back) {
captureDevice = device
} else {
fatalError("no back camera")
}
guard let input = try? AVCaptureDeviceInput(device: captureDevice) else {
fatalError("could not create input device from back camera")
}
if !captureSession.canAddInput(input) {
fatalError("could not add back camera input to capture session")
}
captureInput = input
captureSession.addInput(input)
}
func setupPreviewLayer() {
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
view.layer.addSublayer(previewLayer)
previewLayer.frame = self.view.layer.frame
}
func setZoom(_ value: CGFloat, animated: Bool) {
guard let device = captureDevice else { return }
let maxZoom: CGFloat = captureDevice.maxAvailableVideoZoomFactor
let minZoom: CGFloat = captureDevice.minAvailableVideoZoomFactor
let zoomValue = max(min(value, maxZoom), minZoom)
let deltaZoom = Float(abs(zoomValue - device.videoZoomFactor))
do {
try device.lockForConfiguration()
if animated {
device.ramp(toVideoZoomFactor: zoomValue, withRate: max(deltaZoom * 50.0, 50.0))
} else {
device.videoZoomFactor = zoomValue
}
device.unlockForConfiguration()
} catch {
return
}
}
}
What is the purpose of AdjustmentsSecondary.data included in the PHAssetResource for a cleaned-up image?
When using creationRequest.addResource, what should be set for the PHAssetResourceType?
If I set the PHAssetResourceType as follows to create an asset, it appears correctly in the camera roll. However, when attempting to edit the image in the Photos app, the app crashes:
IMG_5332.HEIC → .photo
FullSizeRender.HEIC → .fullSizePhoto
Adjustments.plist → .adjustmentData
AdjustmentsSecondary.data → .adjustmentData
for a while i had one photo widget (no special app, just the standard apple one) and it was set to shuffle to an album of pics of my bf. no problems at all. a few weeks later i added one to shuffle through an album of pics of my cat, and that one worked fine, but it made the one of my bf stop working, and it just showed a blank white widget, no error message or anything. so i removed the one of my cat hoping the one of my bf would go back to working, and it didn’t. i only have the widgets for find my, my bank, and then apps on my home screen otherwise.
Hey, I have a complex CIFilter chain I'm trying to debug to improve processing time. Is there any documentation on what all the colours mean and the naming, e.g. sRGB Linear_to_workspace?
Thanks
Alex
Support external cameras in your iPadOS app and use Swift to read multiple camera feeds?
thanks
I set both the AVCapturePhotoOutput and the AVCapturePhotoSettings with maxPhotoDimensions = .init(width: 8064, height: 6048), but still get the 12mp photo.
Topic:
Media Technologies
SubTopic:
Photos & Camera
is forKey:fileSize considered accessing non-public API?
has your app been rejected at review stage due to this?
let resources = PHAssetResource.assetResources(for: asset)
if let resource = resources.first {
if let fileSize = resource.value(forKey: "fileSize") as? Int {
return fileSize
}
}
Hello everyone, I need some help about this things.
If you also know, pls comment.
Overview
We are planning to develop an app using the “Support external cameras in your iPadOS app” feature introduced in iPadOS 17.
Before implementing this feature, it is necessary for the iPad to recognize external cameras. However, among the iPad models compatible with iPadOS 17, we have found that some of the iPads owned by our development team can recognize external cameras, while others cannot.
If you have any reports regarding compatibility issues or information on how to resolve these problems, please share them with us.
Detailed Explanation:
The results of our investigation are as follows:
External Camera Used: A 360-degree camera
Devices Firmware
RICOH Theta X 2.61.0(2024/12/26Latest)
RICOH Theta Z1
Tested iPad
Devices Firmware Status
12.9インチiPad Pro(第3世代) IOS 17.5.1 OK
11インチiPad Pro(M4) IOS 18.2 NG
Verification Method
Step 1: Power on the iPad and the external camera, ensuring both are ready for connection.
Step 2: Connect the iPad and the external camera using a USB-C cable.
Step 3: Launch FaceTime on the iPad and check the displayed camera feed.
If the external camera is recognized, the feed from the external camera will be displayed.
Hey everyone😊, I am building an app that includes a live camera feed preview. That's all I need to do along side identifying the images with createML's image classification. I don't need to capture images at all. I've seen some very complicated tutorials. I just want to use a couple of lines of code.
Topic:
Media Technologies
SubTopic:
Photos & Camera
Our app filters the photo library to a certain date range for ease of picking photos. However, to do this, we have to require full permissions to the photo library. We would like to use the PHPickerViewController and have it filter the results by the assets creation date? This would allow us to use it.
I see other filter options, but not this one. And if it isn't there, is this something that is being thought about or on a roadmap?
Hello,
I am experiencing slow image retrieval when using the requestImageForAsset:targetSize:contentMode:options:resultHandler: method in my application. The delay is significantly impacting the performance of my app.
Here are the details of my implementation:
for (PHAsset *asset in assets) {
@autoreleasepool {
PHImageManager *imageManager = [PHImageManager defaultManager];
PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];
options.synchronous = YES;
options.deliveryMode = PHImageRequestOptionsDeliveryModeFastFormat;
options.resizeMode = PHImageRequestOptionsResizeModeNone;
[imageManager requestImageForAsset:asset
targetSize:CGSizeMake(100, 100)
contentMode:PHImageContentModeAspectFill
options:options
resultHandler:^(UIImage *thumbnail, NSDictionary *info) {
CameraRollCellDto *cellDto = [[CameraRollCellDto alloc] init];
cellDto.index = index;
cellDto.thumbnail = thumbnail;
cellDto.propertyDate = asset.creationDate;
if (self.segmentedTorikomi.selectedSegmentIndex == SEG_INDEX_IKKATSU) {
cellDto.isSelected = YES;
} else {
cellDto.isSelected = NO;
}
[list addObject:cellDto];
}];
index++;
}
}
Has anyone else encountered this issue? Are there any known solutions or optimizations that can help improve the speed of image retrieval using this method?
Thank you for your assistance.
Topic:
Media Technologies
SubTopic:
Photos & Camera
I'd like to add a share extension to my app (an Action app extension, I think). The extension would appear when users share a photo in the Photos app (and, ideally, Safari). If you tapped my app icon on the share sheet, iOS would pass the photo to my app and switch the user from Photos or Safari to my full app, with the shared photo(s) available for my app to work with.
I know this is possible, because Instagram (a third-party app) works exactly like this. If you look at an image in the Photos app, tap Share and then tap Instagram, iOS will background the Photos app, activate the Instagram app and let you edit and post your photo in the main Instagram app.
It seems like NSExtensionContext#open(_:completionHandler:) might do this if I add a custom URL to my main app, but the documentation for that says:
Each extension point determines whether to support this method, or under which conditions to support this method. In iOS, the Today and iMessage app extension points support this method.
That would rule out an Action, Photo Editing or Share extension. But then how does Instagram do this, and how can I achieve the same in my app?
I know that it's possible for an Action, Photo Editing or Share extension to open as a mini-app on top of the app providing the content. But coordinating the IPC for that is much, much more work (for my particular app) than just switching the user over to the app, with full access to all the functionality and data that my main app usually has access to.
How can I use my RGB Curve points:
let redCurve = [CIVector(x: 0, y: 0), CIVector(x: 0.235, y: 0.152), CIVector(x: 0.5, y: 0.5), CIVector(x: 1, y: 1)]
let greenCurve = [CIVector(x: 0, y: 0), CIVector(x: 0.247, y: 0.196), CIVector(x: 0.5, y: 0.5), CIVector(x: 1, y: 1)]
let blueCurve = [CIVector(x: 0, y: 0), CIVector(x: 0.235, y: 0.184), CIVector(x: 0.466, y: 0.466), CIVector(x: 1, y: 1)]
in colorCurvesFilter which I've found in Apple Docs:
func colorCurves(inputImage: CIImage) -> CIImage {
let colorCurvesEffect = CIFilter.colorCurves()
colorCurvesEffect.inputImage = inputImage
colorCurvesEffect.curvesDomain = CIVector(x: 0, y: 1)
colorCurvesEffect.curvesData = Data(
bytes: [Float32]([
0.0,0.0,0.0,
0.8,0.8,0.8,
1.0,1.0,1.0
]), count: 36)
colorCurvesEffect.colorSpace = CGColorSpaceCreateDeviceRGB()
return colorCurvesEffect.outputImage!
}
Hello everyone,
I have a SwiftUI app using WKWebView to load a website that includes a form with a file input (). The issue is:
📌 When a user taps “Browse” and selects “Take Photo” (camera option), the app crashes before the camera opens.
Setup Details:
• App Uses SwiftUI with WKWebView
• The crash occurs only when selecting “Take Photo”, but selecting an image from the library works fine.
📌 Full Code (WKWebView in SwiftUI)
import SwiftUI
import WebKit
struct WebViewRepresentable: UIViewRepresentable {
var urlString: String
func makeUIView(context: Context) -> WKWebView {
let webView = WKWebView()
webView.configuration.allowsInlineMediaPlayback = true
webView.configuration.mediaTypesRequiringUserActionForPlayback = []
loadURL(in: webView)
return webView
}
func updateUIView(_ uiView: WKWebView, context: Context) {
loadURL(in: uiView)
}
private func loadURL(in webView: WKWebView) {
if let url = URL(string: urlString) {
webView.load(URLRequest(url: url))
}
}
}
struct ContentView: View {
@State private var currentURL: String = "https://fv-wohlensee.ch"
var body: some View {
VStack(spacing: 0) {
// Oberer Bereich in Grün
Color(red: 0, green: 0.4, blue: 0)
.frame(height: 50)
// WebView with white background
WebViewRepresentable(urlString: currentURL)
.background(Color.white)
Divider()
// Navigation buttons
HStack(spacing: 10) {
Button {
currentURL = "https://fv-wohlensee.ch/vereinshaus-eymatt/"
} label: {
VStack {
Image(systemName: "house")
.font(.system(size: 18))
Text("Klubhaus")
.font(.system(size: 12))
.minimumScaleFactor(0.7)
.lineLimit(1)
}
.padding(8)
}
.foregroundColor(.white)
.frame(maxWidth: .infinity)
Button {
currentURL = "https://fv-wohlensee.ch/vereinsboot/"
} label: {
VStack {
Image(systemName: "ferry.fill")
.font(.system(size: 18))
Text("Boot")
.font(.system(size: 12))
.minimumScaleFactor(0.7)
.lineLimit(1)
}
.padding(8)
}
.foregroundColor(.white)
.frame(maxWidth: .infinity)
Button {
currentURL = "https://fv-wohlensee.ch/aktivitaeten/"
} label: {
VStack {
Image(systemName: "calendar")
.font(.system(size: 18))
Text("Aktivitäten")
.font(.system(size: 12))
.minimumScaleFactor(0.7)
.lineLimit(1)
}
.padding(8)
}
.foregroundColor(.white)
.frame(maxWidth: .infinity)
Button {
currentURL = "https://fv-wohlensee.ch/mitglied-werden/"
} label: {
VStack {
Image(systemName: "person.badge.plus")
.font(.system(size: 18))
Text("Mitglied")
.font(.system(size: 12))
.minimumScaleFactor(0.7)
.lineLimit(1)
}
.padding(8)
}
.foregroundColor(.white)
.frame(maxWidth: .infinity)
}
.padding(.horizontal, 15)
.padding(.vertical, 10)
.background(Color(red: 0, green: 0.4, blue: 0))
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(Color(red: 0, green: 0.4, blue: 0))
.ignoresSafeArea()
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
What I’ve Tried:
1️⃣ Checked Info.plist: Added permissions for camera and photo library:
<key>NSCameraUsageDescription</key>
<string>This app requires access to the camera to upload photos.</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>This app requires access to your photo library.</string>
2️⃣ Enabled Media Capture in WKWebView:
webView.configuration.allowsInlineMediaPlayback = true
webView.configuration.mediaTypesRequiringUserActionForPlayback = []
3️⃣ Tested in Safari: The same form works fine when opened in Safari.
Questions:
❓ Does WKWebView need additional permissions to open the camera?
❓ Do I need to implement a delegate to handle file uploads in SwiftUI?
❓ Has anyone faced this issue and found a fix?
Any guidance would be greatly appreciated! 🚀
Thanks in advance! 😊
Topic:
Media Technologies
SubTopic:
Photos & Camera
Following WWDC 2023 "Support HDR images in your app", I'm trying to save 48-megapixel ProRAWs (taken on an iPhone 14 Pro Max) as HDR HEICs to the Photo Library. After processing the ProRAW file using CIRAWFilter, whether I use CIContext.heif10Representation() or convert to a CGImage, then UIImage, and use UIImage.heicData(), I get photos that behave oddly in the Photo Library. They appear too dark, and visibly brighten when first viewed, but more problematic is that the photos brighten a great deal more when you edit them with the Photos editor. This is the behavior when using the itur_2100_PQ color space, but itur_2100_HLG behaves similarly, except that it gets dramatically darker when edited. This behavior occurs whether CIRAWFilter.extendedDynamicRangeAmount is set to 0.0, or 2.0, or not set at all.
So what am I doing wrong? Here is a minimal iOS app -- well, just the ContentView -- that demonstrates the issue. You also need a .dng ProRAW file included in the project directory named test.dng. I'd love to include such a file, but I can't.
Be prepared for a multi-second wait when you save the photo.
import SwiftUI
import Photos
struct ContentView: View {
let context = CIContext()
let hdrColorSpace = CGColorSpace(name: CGColorSpace.itur_2100_PQ)!
var body: some View {
VStack(spacing: 100) {
Button("Save Photo From CGImage/UIImage") {
savePhotoFromUIImage()
}
Button("Save Photo From CIImage") {
savePhotoDirectFromCIImage()
}
}.padding(60)
}
//convert RAW with CIRAWFilter to CIImage, then convert to CGImage, then UIImage, then HEIF
private func savePhotoFromUIImage() {
if let ciImage = processRAW(url: Bundle.main.url(forResource:"test", withExtension: "dng")!) {
guard let outputCGImage = context.createCGImage(ciImage, from: ciImage.extent, format: .RGB10, colorSpace: hdrColorSpace) else { return }
let uiImage = UIImage(cgImage: outputCGImage)
if let heicData = uiImage.heicData() {
saveHEIFPhotoToLibrary(imageData: heicData)
} else {
print("Failed to convert UIImage to HEIC")
}
}
}
//convert RAW with CIRAWFilter to CIImage, then to HEIF
private func savePhotoDirectFromCIImage() {
if let ciImage = processRAW(url: Bundle.main.url(forResource:"test", withExtension: "dng")!) {
do {
let heif = try context.heif10Representation(of: ciImage, colorSpace: hdrColorSpace)
saveHEIFPhotoToLibrary(imageData: heif)
} catch {
print("Failed to get HEIF representation from CIContext")
}
}
}
private func processRAW(url: URL) -> CIImage? {
guard let coreRawFilter = CIRAWFilter(imageURL: url) else { return nil }
coreRawFilter.extendedDynamicRangeAmount = 2.0 //the issue persists whether this is not set, or set to 0, or set to, say, 2.0
guard let ciImage = coreRawFilter.outputImage else { return nil }
return ciImage
}
private func saveHEIFPhotoToLibrary(imageData: Data) {
PHPhotoLibrary.shared().performChanges({
let creationRequest = PHAssetCreationRequest.forAsset()
let options = PHAssetResourceCreationOptions()
creationRequest.addResource(with: .photo, data: imageData, options: options)
}) { success, error in
if let error = error {
print("Error saving photo: \(error.localizedDescription)")
} else {
print("Photo saved.")
}
}
}
}
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Photos and Imaging
Core Graphics
Core Image
EDR
How can I use my RGB Curve points:
let redCurve = [CIVector(x: 0, y: 0), CIVector(x: 0.235, y: 0.152), CIVector(x: 0.5, y: 0.5), CIVector(x: 1, y: 1)]
let greenCurve = [CIVector(x: 0, y: 0), CIVector(x: 0.247, y: 0.196), CIVector(x: 0.5, y: 0.5), CIVector(x: 1, y: 1)]
let blueCurve = [CIVector(x: 0, y: 0), CIVector(x: 0.235, y: 0.184), CIVector(x: 0.466, y: 0.466), CIVector(x: 1, y: 1)]
in colorCurvesFilter which I've found in Apple Docs:
func colorCurves(inputImage: CIImage) -> CIImage {
let colorCurvesEffect = CIFilter.colorCurves()
colorCurvesEffect.inputImage = inputImage
colorCurvesEffect.curvesDomain = CIVector(x: 0, y: 1)
colorCurvesEffect.curvesData = Data(
bytes: [Float32]([
0.0,0.0,0.0,
0.8,0.8,0.8,
1.0,1.0,1.0
]), count: 36)
colorCurvesEffect.colorSpace = CGColorSpaceCreateDeviceRGB()
return colorCurvesEffect.outputImage!
}
Hi! I'm attempting to add purpose string when requesting to access the camera, but for some reason it doesn't seem to be working. Below I've included the alert and the plist.
I am developing an iOS app with video call functionality and implementing Picture in Picture (PiP) mode for video calls. The issue I am facing is that the camera stops capturing video when the app goes to the background, even though the PiP view is still visible.
I have noticed that some apps, like Telegram, manage to keep the camera working in PiP mode while the app is in the background. How can I achieve this in my app?
Hey, I'm building a camera app and I want to use the captured HDRGainMap along side the photo to do some processing with a CIFilter chain. How can this be done? I can't find any documentation any where on this, only on how to access the HDRGainMap from an existing HEIC file, which I have done successfully. For this I'm doing something like the following:
let gainmap = CGImageSourceCopyAuxiliaryDataInfoAtIndex(source, 0, kCGImageAuxiliaryDataTypeHDRGainMap)
let gainDict = NSDictionary(dictionary: gainmap)
let gainData = gainDict[kCGImageAuxiliaryDataInfoData] as? Data
let gainDescription = gainDict[kCGImageAuxiliaryDataInfoDataDescription]
let gainMeta = gainDict[kCGImageAuxiliaryDataInfoMetadata]
However I'm not sure what the approach is with a AVCapturePhoto output from a AVCaptureDevice.
Thanks!