CIDetector and UIImagePickerController

Question

I\'m trying to implement the built-in iOS 5 face detection API. I\'m using an instance of UIImagePickerController to allow the user to take a photo and then I\'

Answer 1

Swift 3 Version

var exifOrientation : Int
switch (inputImage.imageOrientation)
{
case UIImageOrientation.up:
    exifOrientation = 1;
case UIImageOrientation.down:
    exifOrientation = 3;
case UIImageOrientation.left:
    exifOrientation = 8;
case UIImageOrientation.right:
    exifOrientation = 6;
case UIImageOrientation.upMirrored:
    exifOrientation = 2;
case UIImageOrientation.downMirrored:
    exifOrientation = 4;
case UIImageOrientation.leftMirrored:
    exifOrientation = 5;
case UIImageOrientation.rightMirrored:
    exifOrientation = 7;
}

let ciImage = CIImage(cgImage: inputImage.cgImage!)
let options = [CIDetectorAccuracy: CIDetectorAccuracyHigh]
let faceDetector = CIDetector(ofType: CIDetectorTypeFace, context: nil, options: options)!
let faces = faceDetector.features(in: ciImage, options:["CIDetectorImageOrientation":exifOrientation])