I am using CoreImage on IOS to detect faces in an image. It works fine when there are multiple faces, but doesn't work for simple faces such as this one:
The face is really big and obvious, but CoreImage cannot detect it.
I'm thinking it may be because of my kCGImagePropertyOrientation.
I set it to 5, simply because that's what an online tutorial did.
However, the images which I am processing are user uploaded, so I do not know the orientation of the face beforehand.
Is there a way to try all orientations?
What is the proper way of implementing CoreImage facial detection when the images are not known before hand?
This is my code:
var imageOptions = Dictionary<String,Any>()
imageOptions[CIDetectorImageOrientation] = 5
imageOptions[CIDetectorSmile] = true
let image = CIImage(cgImage: imageView.image!.cgImage!)
let accuracy = [CIDetectorAccuracy: CIDetectorAccuracyHigh]
let faceDetector = CIDetector(ofType: CIDetectorTypeFace, context: nil, options: accuracy)
let faces = faceDetector?.features(in: image, options: imageOptions as? [String : AnyObject])