Question

我正在尝试开发用于脸部识别/检测的iPhone。在我的应用程序中，我想让我的iPhone相机应该自动聚焦和自动捕获。

如何从iPhone应用程序识别脸部？

可以在我们的iPhone应用中自动对焦脸部和自动捕捉。如果有可能请任何人帮忙做到这一点？我只想要任何有关它的建议/想法和教程。

你能帮帮我吗？提前谢谢。

Answer 1

Core Image有一个新的CIFaceDetector来实时检测面部;您可以从这些示例开始概述：
SquareCam
iOS Facial Recognition
Easy Face detection with Core Image

Answer 2

检查此代码。您必须导入以下内容： - CoreImage / CoreImage.h CoreImage / CoreImage.h之后使用代码： -

-(void)markFaces:(UIImageView *)facePicture
{
// draw a CI image with the previously loaded face detection picture
CIImage* image = [CIImage imageWithCGImage:facePicture.image.CGImage];

// create a face detector - since speed is not an issue we'll use a high accuracy
// detector
CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace 
                                          context:nil options:[NSDictionary dictionaryWithObject:CIDetectorAccuracyHigh forKey:CIDetectorAccuracy]];

// create an array containing all the detected faces from the detector    
NSArray* features = [detector featuresInImage:image];

// we'll iterate through every detected face.  CIFaceFeature provides us
// with the width for the entire face, and the coordinates of each eye
// and the mouth if detected.  Also provided are BOOL's for the eye's and
// mouth so we can check if they already exist.
for(CIFaceFeature* faceFeature in features)
{
    // get the width of the face
    CGFloat faceWidth = faceFeature.bounds.size.width;

    // create a UIView using the bounds of the face
    UIView* faceView = [[UIView alloc] initWithFrame:faceFeature.bounds];

    // add a border around the newly created UIView
    faceView.layer.borderWidth = 1;
    faceView.layer.borderColor = [[UIColor redColor] CGColor];

    // add the new view to create a box around the face
    [self.window addSubview:faceView];

    if(faceFeature.hasLeftEyePosition)
    {
        // create a UIView with a size based on the width of the face
        UIView* leftEyeView = [[UIView alloc] initWithFrame:CGRectMake(faceFeature.leftEyePosition.x-faceWidth*0.15, faceFeature.leftEyePosition.y-faceWidth*0.15, faceWidth*0.3, faceWidth*0.3)];
        // change the background color of the eye view
        [leftEyeView setBackgroundColor:[[UIColor blueColor] colorWithAlphaComponent:0.3]];
        // set the position of the leftEyeView based on the face
        [leftEyeView setCenter:faceFeature.leftEyePosition];
        // round the corners
        leftEyeView.layer.cornerRadius = faceWidth*0.15;
        // add the view to the window
        [self.window addSubview:leftEyeView];
    }

    if(faceFeature.hasRightEyePosition)
    {
        // create a UIView with a size based on the width of the face
        UIView* leftEye = [[UIView alloc] initWithFrame:CGRectMake(faceFeature.rightEyePosition.x-faceWidth*0.15, faceFeature.rightEyePosition.y-faceWidth*0.15, faceWidth*0.3, faceWidth*0.3)];
        // change the background color of the eye view
        [leftEye setBackgroundColor:[[UIColor blueColor] colorWithAlphaComponent:0.3]];
        // set the position of the rightEyeView based on the face
        [leftEye setCenter:faceFeature.rightEyePosition];
        // round the corners
        leftEye.layer.cornerRadius = faceWidth*0.15;
        // add the new view to the window
        [self.window addSubview:leftEye];
    }

    if(faceFeature.hasMouthPosition)
    {
        // create a UIView with a size based on the width of the face
        UIView* mouth = [[UIView alloc] initWithFrame:CGRectMake(faceFeature.mouthPosition.x-faceWidth*0.2, faceFeature.mouthPosition.y-faceWidth*0.2, faceWidth*0.4, faceWidth*0.4)];
        // change the background color for the mouth to green
        [mouth setBackgroundColor:[[UIColor greenColor] colorWithAlphaComponent:0.3]];
        // set the position of the mouthView based on the face
        [mouth setCenter:faceFeature.mouthPosition];
        // round the corners
        mouth.layer.cornerRadius = faceWidth*0.2;
        // add the new view to the window
        [self.window addSubview:mouth];
    }
}
}

-(void)faceDetector
{
// Load the picture for face detection
UIImageView* image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"facedetectionpic.jpg"]];

// Draw the face detection image
[self.window addSubview:image];

// Execute the method used to markFaces in background
[self performSelectorInBackground:@selector(markFaces:) withObject:image];

// flip image on y-axis to match coordinate system used by core image
[image setTransform:CGAffineTransformMakeScale(1, -1)];

// flip the entire window to make everything right side up
[self.window setTransform:CGAffineTransformMakeScale(1, -1)];
}


 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
[self faceDetector]; // execute the faceDetector code

return YES;
}

希望有所帮助，谢谢：）

如何开发人脸识别iPhone应用程序？

2 个答案: