Come sviluppare un'app iPhone per il riconoscimento del volto?

Question

Sto provando a sviluppare un iPhone per il riconoscimento/rilevamento di volti. Nella mia app voglio fare in modo che la mia fotocamera dell'iPhone sia messa a fuoco automatica e acquisizione automatica.

Come riconoscere il volto dall'app per iPhone?

È possibile mettere a fuoco automaticamente il volto e l'acquisizione automatica nella nostra app per iPhone. Se è possibile, qualcuno può aiutare a farlo? Voglio solo qualche suggerimento/idee e tutorial su questo.

Potete aiutarmi per favore? Grazie in anticipo.

Answer 1

Core Image ha un nuovo CIFaceDetector per rilevare i volti in tempo reale; si può iniziare con questi esempi di prendere una panoramica:
SquareCam
iOS Facial Recognition
Easy Face detection with Core Image

Answer 2

Selezionare questa code.You necessario importare seguente: - CoreImage/CoreImage.h CoreImage/CoreImage.h e dopo che utilizzare il codice: -

-(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; 
} 

Speranza che aiuta :) grazie

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