ios - ML Kit face detection front camera not working

Question

Why doesn't the following code detect a face with the front camera?

@objc private func finishButtonPressed() {
    
    let userVerificationPicture = userVerificationPictureImageView.image!
    let options = FaceDetectorOptions()

    options.performanceMode = .accurate

    let faceDetector = FaceDetector.faceDetector(options: options)
    let visionImage = VisionImage(image: userVerificationPicture)

    visionImage.orientation = userVerificationPicture.imageOrientation
    
    faceDetector.process(visionImage) { faces, error in
        
        guard error == nil, let faces = faces, !faces.isEmpty else {
            return
        }
        
        for face in faces {
            // faces array is always empty with front camera
            print(face)
        }
    }
}

I am following the documentation here using a UIImage:

https://developers.google.com/ml-kit/vision/face-detection/ios

And the code above will detect a face when the back camera is used every time, but never with the front camera. Why is it not working? I am following the documentation exactly as it says.

question from:https://stackoverflow.com/questions/65647760/ml-kit-face-detection-front-camera-not-working

Answer 1

Waitting for answers