CoreImage人脸识别

1.首先要导入CoreImage.framework框架
2.引入头文件

 #import 

 /**识别脸部*/
 -(NSArray *)detectFaceWithImage:(UIImage *)faceImage
 {
 NSDictionary *opts = [NSDictionary dictionaryWithObject:
 CIDetectorAccuracyHigh forKey:CIDetectorAccuracy];
 CIDetector *detectoer=[CIDetector detectorOfType:CIDetectorTypeFace context:nil options:opts];
 CIImage *ciimage=[CIImage imageWithCGImage:faceImage.CGImage];
 NSArray *featrues=[detectoer featuresInImage:ciimage];
 if(featrues.count>0)
 return featrues;
 return nil;
 }

3.使用方法如下

 //脸部识别
 
 
 
  
 
(void)viewDidLoad {
 [super viewDidLoad];
 
//带人脸的照片
 UIImage *image=[UIImage imageNamed:@"face.png"];
 NSArray *results=[self detectFaceWithImage:image];
 //可能会存在多个脸部，这里只考虑一张脸的情况
 if(results.count>0)
 {
 CIFaceFeature *face=[results firstObject];
 if(face.hasSmile)
 NSLog(@"有微笑");
 if(face.leftEyeClosed)
 NSLog(@"左眼闭着的");
 if(face.rightEyeClosed)
 NSLog(@"右眼闭着的");
 if(face.hasLeftEyePosition)
 NSLog(@"左眼位置：%@",NSStringFromCGPoint(face.leftEyePosition));
 if(face.hasRightEyePosition)
 NSLog(@"右眼位置：%@",NSStringFromCGPoint(face.rightEyePosition));
 if(face.hasMouthPosition)
 NSLog(@"嘴巴位置：%@",NSStringFromCGPoint(face.mouthPosition));
 NSLog(@"脸部区域：%@",NSStringFromCGRect(face.bounds));
 if(face.bounds.size.width==face.bounds.size.height)
 NSLog(@"脸蛋是圆的-.-");
 }
 }