我正在使用CIFaceFeature来检测脸部并微笑它正确地检测到脸部但它没有检测到人们正在微笑的天气 我使用以下代码来检测微笑
CIImage* image = [CIImage imageWithCGImage:facePicture.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:CIDetectorAccuracyLow 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.
// NSLog(@"Finding: %d",[features count]);
HUDView.hidden = YES;
for(CIFaceFeature* faceFeature in features)
{
HUDView.hidden = NO;
// get the width of the face
CGFloat faceWidth = faceFeature.bounds.size.width;
// create a UIView using the bounds of the face
//faceView = [[UIView alloc] initWithFrame:faceFeature.bounds];
faceView.frame = faceFeature.bounds;
// add a border around the newly created UIView
faceView.backgroundColor = [UIColor clearColor];
faceView.layer.borderWidth = 1;
faceView.layer.borderColor = [[UIColor redColor] CGColor];
if(faceFeature.hasMouthPosition)
{
// create a UIView with a size based on the width of the face
NSLog(@"%f",faceFeature.rightEyePosition.x);
NSLog(@"%f",faceFeature.leftEyePosition.x);
NSLog(@"%f",faceFeature.mouthPosition.x);
NSLog(@"%f %f %f %f",faceFeature.mouthPosition.x-faceWidth*0.2,faceFeature.mouthPosition.y-faceWidth*0.2, faceWidth*0.4, faceWidth*0.4);
CGRect mouthRect = CGRectMake(faceFeature.mouthPosition.x-faceWidth*0.2, faceFeature.mouthPosition.y-faceWidth*0.2, faceWidth*0.4, faceFeature.bounds.size.height*0.4);
CGRect pointRect = CGRectMake(faceFeature.mouthPosition.x-faceWidth*0.2, faceFeature.mouthPosition.y-faceWidth*0.2, 3, 3);
pointView.frame = pointRect;
[pointView setBackgroundColor:[[UIColor blueColor] colorWithAlphaComponent:0.5]];
// set the position of the mouthView based on the face
[pointView setCenter:faceFeature.mouthPosition];
// round the corners
pointView.layer.cornerRadius = faceWidth*0.2;
//float topSpace = faceFeature.bounds.origin.y;
float bottomSpace = 460- (faceFeature.bounds.origin.y+faceFeature.bounds.size.height);
CGRect cutRect = CGRectMake(faceFeature.mouthPosition.x-faceWidth*0.2, bottomSpace+(faceWidth*0.75)+faceWidth*0.02,
faceWidth*0.4, faceWidth*0.2);
mouthRect.origin.y += ((faceFeature.bounds.origin.y)+faceWidth*0.4);
//mouthRect.origin.y += facePicture.bounds.size.height - (faceFeature.mouthPosition.y + faceWidth*0.2);
// CGImageRef imageRef = CGImageCreateWithImageInRect([facePicture CGImage], mouthRect);
CGImageRef imageRef = CGImageCreateWithImageInRect([facePicture CGImage], cutRect);
// or use the UIImage wherever you like
//////////////////////////////////////////////////////////////
UIImage *smileData = [UIImage imageWithCGImage:imageRef];
smileView.image = [[SDetector detector] convertImageToGrayColor:smileData];
CGImageRelease(imageRef);
NSMutableArray *histoData = [[SDetector detector] getHistogramArray:smileData];
int value = [[SDetector detector] smileProcess:histoData];
scoreLB.text = [NSString stringWithFormat:@"%d",value];
//histogramImageView.image = [[SDetector detector] drawHistogram:histoData];
//////////////////////////////////////////////////////////////
oldHistoArr = newHistoArr;
newHistoArr = histoData;
int oldSum=0,oldAVG=0;
int newSum=0,newAVG=0;
oldDiffSUM = newDiffSUM;
newDiffSUM = 0;
NSLog(@"[oldHistoArr count]:>>>>>>>>>>>>>%d",[oldHistoArr count]);
NSLog(@"[newHistoArr count]:>>>>>>>>>>>>>%d",[newHistoArr count]);
if ([oldHistoArr count]>0) {
for (int i=0; i<256; i++)
{
oldSum += [[oldHistoArr objectAtIndex:i] intValue];
newSum += [[newHistoArr objectAtIndex:i] intValue];
newDiffSUM += 0.7*abs([[oldHistoArr objectAtIndex:i] intValue] - [[newHistoArr objectAtIndex:i] intValue]);
}
oldAVG = oldSum/256;
newAVG = newSum/256;
float multi = ((float)(250-faceWidth)/250.0) /1.9 +1.0;
float ratio = (float)newDiffSUM/(float)oldDiffSUM;
if (ratio>2) {
ratio = ratio*multi;
}
NSLog(@"FW: %f[%f] [DIFF: %d]\t%f\t%f",faceWidth,multi,newDiffSUM,ratio,ratio/6.0);
[progressView setProgress:ratio/6.0];
scoreLB.text = [NSString stringWithFormat:@"%d",newDiffSUM];
if (ratio >= currentLevel && autoON) {
NSLog(@"Capture At %f > %f", ratio,currentLevel);
[self captureStillImage:nil];
}
}
////////////////////////////////////////////
mouth.frame = mouthRect;
// 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
NSLog(@"%f",faceFeature.bounds.size.height);
}
//NSLog(@"Lx%.2f Ly%.2f Rx%.2f Ry%.2f Mx%.2f My%.2f", faceFeature.leftEyePosition.x, faceFeature.leftEyePosition.y, faceFeature.rightEyePosition.x, faceFeature.rightEyePosition.y, faceFeature.mouthPosition.x, faceFeature.mouthPosition.y);
}
答案 0 :(得分：1)
在iOS 7中，您可以使用CoreImage检测微笑。以下是Beta 2的API差异：
CoreImage
CIDetector.h
添加了CIDetectorEyeBlink
添加了CIDetectorSmile
答案 1 :(得分：0)
CoreImage足以检测图像中的笑容。
NSDictionary *options = @{ CIDetectorSmile: @(YES), CIDetectorEyeBlink: @(YES),};
NSArray *features = [detector featuresInImage:image options:options];
然后你可以查看天气faceFeature的hasSmile功能返回YES或NO
在swift 3- 首先，您将“图像”作为CIImage，然后按照代码 -
let cid = CIDetector(ofType: CIDetectorTypeFace, context: nil, options: [CIDetectorAccuracy : CIDetectorAccuracyHigh , CIDetectorSmile : true , CIDetectorTypeFace : true ] )
let faces = cid!.features(in: image!, options: [CIDetectorSmile : true , CIDetectorEyeBlink : true , CIDetectorImageOrientation : 1])
for face in faces as! [CIFaceFeature] {
print("Is right eye closed : \(face.rightEyeClosed)"
print("Is left eye closed : \(face.leftEyeClosed)"
print("Is having smile : \(face.hasSmile)"
}