如何在Swift中执行人脸检测 [英] How do I perform Face Detection in Swift
本文介绍了如何在Swift中执行人脸检测的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我使用以下代码从图像中检测人脸.
Im using the following code to detect a face from an image.
let userDirectory = FileManager.default.homeDirectoryForCurrentUser
let desktopDirectory = userDirectory.appendingPathComponent("Desktop")
let pictureUrl = desktopDirectory.appendingPathComponent("test").appendingPathExtension("jpg")
let image = CIImage(contentsOf: pictureUrl)
let faceDetector = CIDetector(ofType: CIDetectorTypeFace, context: nil, options: [CIDetectorAccuracy: CIDetectorAccuracyHigh])
let faces = faceDetector?.features(in: image!) as! [CIFaceFeature]
print("Number of faces: \(faces.count)")
如何检测人脸并将其保存到NSImage?
How can I detect a face and save it to an NSImage?
推荐答案
Xcode 9•Swift 4
extension NSImage {
var ciImage: CIImage? {
guard let data = tiffRepresentation else { return nil }
return CIImage(data: data)
}
var faces: [NSImage] {
guard let ciImage = ciImage else { return [] }
return (CIDetector(ofType: CIDetectorTypeFace, context: nil, options: [CIDetectorAccuracy: CIDetectorAccuracyHigh])?
.features(in: ciImage) as? [CIFaceFeature])?
.map {
let ciimage = ciImage.cropped(to: $0.bounds) // Swift 3 use cropping(to:)
let imageRep = NSCIImageRep(ciImage: ciimage)
let nsImage = NSImage(size: imageRep.size)
nsImage.addRepresentation(imageRep)
return nsImage
} ?? []
}
}
测试
Testing
let image = NSImage(contentsOf: URL(string: "https://i.stack.imgur.com/Xs4RX.jpg")!)!
let faces = image.faces
这篇关于如何在Swift中执行人脸检测的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文