使用CoreImage进行人脸识别

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1. - (BOOL)checkImageHasFace  
2. {  
3.     BOOL hasFace = NO;  
4.     CIImage *begingImage = [[CIImage alloc] initWithImage:_postImage];  
5.     //创建CIDetector对象，options使用NSDictionary设置采用高品质还是低品质，这里使用低品质。  
6.     CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeFace context:nil options:[NSDictionary dictionaryWithObject:CIDetectorAccuracyLow forKey:CIDetectorAccuracy]];  
7.     //返回数组中包含图片脸部特征信息  
8.     NSArray *faceFeatures = [detector featuresInImage:begingImage];  
9.     for (CIFaceFeature *faceFeature in faceFeatures) {  
10.         //左眼位置、右眼位置和嘴的位置  
11.         if (faceFeature.hasLeftEyePosition&&faceFeature.hasRightEyePosition&&faceFeature.hasMouthPosition) {  
12.             hasFace = YES;  
13.         }  
14.     }  
15.     return hasFace;  
16. }