CIFaceFeature hasSmile总是错误的

Question

使用以下方法检测图像中的人脸：

var ciImage  = CIImage(CGImage:imageView.image!.CGImage)
var ciDetector = CIDetector(ofType: CIDetectorTypeFace, context: nil,
  options: [
    CIDetectorAccuracy: CIDetectorAccuracyHigh,
    CIDetectorSmile: true,
    CIDetectorEyeBlink: true
  ])

var features = ciDetector.featuresInImage(ciImage)

for feature:CIFaceFeature in (features as! [CIFaceFeature]) {
   println("has smile: \(feature.hasSmile)")
}

我在许多图像上运行了以前的代码。hasSmile总是返回false。

如何配置面部检测以正确检测微笑？

Answer 1

在"CIFaceDetector hasSmile“上快速搜索google可以在iOS 7中的笑脸和闪烁检测上获得这个链接。

看起来您需要使用不同形式的ciDetector.featuresInImage调用。Objective中的代码如下所示：

NSDictionary *options = @{ CIDetectorSmile: @(YES), CIDetectorEyeBlink: @(YES),};
NSArray *features = [detector featuresInImage:image options:options];

在Swift中，应该是这样的：

let options: [NSObject: AnyObject] = 
  [CIDetectorSmile: true, CIDetectorEyeBlink, true]
var features = ciDetector.featuresInImage(ciImage, options: options)