ML kit face recognition not working on IOS

Question

I'm working on an app that does facial recognition. One of the steps include detecting the user smile. For that, I am currently using google's Ml Kit. The application works fine on Android platform but when I run on Ios (Iphone Xr and others) it does not recognize any faces on any image. I have already followed every steps on how to integrate Ios and Firebase and it runs fine.

Here's my code. It's always falling on length == 0, as the image would not contain any faces. The image passed as parameter is coming from the image_picker plugin.

Future<Face> verifyFace(File thisImage) async {
  var beforeTime = new DateTime.now();
  final image = FirebaseVisionImage.fromFile(thisImage);
  final faceDetector = FirebaseVision.instance.faceDetector(
    FaceDetectorOptions(
      mode: FaceDetectorMode.accurate,
      enableClassification: true,
    ),
  );

  var processedImages = await faceDetector.processImage(image);
  print('Processing time: ' +
      DateTime.now().difference(beforeTime).inMilliseconds.toString());

  if (processedImages.length == 0) {
    throw new NoFacesDetectedException();
  } else if (processedImages.length == 1) {
    Face face = processedImages.first;
    if(face.smilingProbability == null){
      throw new LipsNotFoundException();
    }
    else {
      return face;
    }
  } else if (processedImages.length > 1) {
    throw new TooManyFacesDetectedException();
  }
}

If someone has any tips or can tell what I am doing wrong I would be very grateful.

Solution

I know this is an old issue, but I was having the same problem and turns out I just forgot to add the pod 'Firebase/MLVisionFaceModel' in the podfile.

Comments

[Léo Moraes]

I already saw that video, it does the same as I am doing on the code posted. As said, it works on Android but not on IOS. About posting code, I cannot do it because of my company's policy, but everything used to detect faces is on the code above

[Dong Chen]

Have you checked out the iOS QuickStart example for ML Kit Vision APIs (including face detection): github.com/firebase/quickstart-ios/tree/master/mlvision (Please note that ML Kit does not support face recognition; it only supports face detection.)