Swift 4:如何使用ios11视觉框架从人脸地标点创建人脸地图

import Vision

let faceLandmarksRequest = VNDetectFaceLandmarksRequest(completionHandler: handleFaceLandmarks)

func handleFaceLandmarks(request: VNRequest, error: Error?) {
    guard let observations = request.results as? [VNFaceObservation] else {
        fatalError("无法获取人脸观察结果")
    }
    
    for observation in observations {
        // 处理每个人脸观察结果
        if let landmarks = observation.landmarks {
            // 创建人脸地图
            let faceMap = landmarks.normalizedPoints
            // 在这里可以对人脸地图进行进一步处理或使用
        }
    }
}

let image = UIImage(named: "face_image.jpg") // 替换为实际的人脸图像
let ciImage = CIImage(image: image)
let imageRequestHandler = VNImageRequestHandler(ciImage: ciImage!)
do {
    try imageRequestHandler.perform([faceLandmarksRequest])
} catch {
    print("无法执行人脸检测请求: \(error)")
}