我使用了以下代码来检测iOS5的人脸
CIImage *cIImage = [CIImage imageWithCGImage:image.CGImage];
CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace context:nil options:[NSDictionary dictionaryWithObject:CIDetectorAccuracyHigh forKey:CIDetectorAccuracy]];
NSArray *features = nil;
features = [detector featuresInImage:cIImage];
if ([features count] == 0)
{
NSDictionary* imageOptions = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:6] forKey:CIDetectorImageOrientation];
features = [detector featuresInImage:cIImage options:imageOptions];
}
使用这段代码,我可以在IOS 5中检测人脸,但最近我们将系统升级到了Xcode 4.4和IOS 6,现在,人脸检测不能正常工作。
在IOS 6中,我需要做哪些更改才能检测到人脸。
我们非常感谢任何形式的帮助。
发布于 2012-10-19 13:05:38
我注意到iOS6的人脸检测不如iOS5的好。尝试选择一组图像。您可能会发现,它在iOS6中可以很好地处理很多图像,但不是所有图像。
我一直在测试同一组图像: 1.运行iOS6的仿真器。2. iPhone 5 (iOS6) 3. iPhone 3GS (iOS5)
与其他两个选项相比,3GS可以检测到更多的人脸。
下面是代码,它在两者上都有效,但在iOS6上就没那么好了:
- (void)analyseFaces:(UIImage *)facePicture {
// Create CI image of the face picture
CIImage* image = [CIImage imageWithCGImage:facePicture.CGImage];
// Create face detector with high accuracy
CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace
context:nil options:[NSDictionary dictionaryWithObject:CIDetectorAccuracyHigh forKey:CIDetectorAccuracy]];
// Create array of detected faces
NSArray* features = [detector featuresInImage:image];
// Read through the faces and add each face image to facesFound mutable
for(CIFaceFeature* faceFeature in features)
{
CGSize parentSize = facePicture.size;
CGRect origRect = faceFeature.bounds;
CGRect flipRect = origRect;
flipRect.origin.y = parentSize.height - (origRect.origin.y + origRect.size.height);
CGImageRef imageRef = CGImageCreateWithImageInRect([facePicture CGImage], flipRect);
UIImage *faceImage = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
if (faceImage)
[facesFound addObject:faceImage];
}
}
发布于 2012-10-05 21:50:32
我希望这对你有帮助。
添加CoreImage.framework
-(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 markFaces:image];
}
-(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)];
}
并检查这两个链接
http://maniacdev.com/2011/11/tutorial-easy-face-detection-with-core-image-in-ios-5/
http://i.ndigo.com.br/2012/01/ios-facial-recognition/
https://stackoverflow.com/questions/12746934
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