如果从相机拍摄图像未检测到使用UIImagePickerControllerSourceTypeCamera

我正在拍摄来自相机的图像（使用UIImagePickerController）并将其保存到文档目录。如果从相机拍摄图像未检测到使用UIImagePickerControllerSourceTypeCamera

然后，我使用CIDetector API和CIfacefeature API在不同的视图控制器中获取这些图像以获取正面部分。

问题是虽然我能够正确获取图像，但并未检测到人脸。如果我将相同的图像存储在它检测到的主包中。

我不知道问题在哪里??。我已经尝试了一切。可能问题出在UIImage，或者可能是将图像保存在文档目录或相机中的格式。

请帮忙。我会感谢你。

- (void) imagePickerController:(UIImagePickerController *)picker  didFinishPickingMediaWithInfo:(NSDictionary *)info 
{ 
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage]; 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, 
                 NSUserDomainMask, YES); 
    NSString *documentsDirectory = [paths objectAtIndex:0]; 
    NSString* path = [documentsDirectory stringByAppendingPathComponent: 
         [NSString stringWithString: @"SampleImage.jpg"] ]; 
    NSData* data = UIImageJPEGRepresentation(image, 0); 
    [data writeToFile:path atomically:YES]; 
    [picker dismissModalViewControllerAnimated:YES]; 
    FCVC *fcvc = [[FCVC alloc] initwithImage:image]; 

    [self.navigationController pushViewController:fcvc animated:YES]; 
}

在FCVC的viewDidLoad中我打电话以下功能通过传递：

-(void)markFaces:(UIImage *)pic 
{ 
    CIImage* image = [CIImage imageWithCGImage:pic.CGImage]; 
    CGImageRef masterFaceImage; 

    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]; 
    for(CIFaceFeature* faceFeature in features) 
    {  
     masterFaceImage = CGImageCreateWithImageInRect(facePicture.CGImage,CGRectMake(faceFeature.bounds.origin.x,faceFeature.bounds.origin.y, faceFeature.bounds.size.width,faceFeature.bounds.size.height)); 
    } 
    self.masterExtractedFace = [UIImage imageWithCGImage:masterFaceImage]; 
}

在此先感谢。

来源

2012-04-05 Pallavi

一个简单的修正这一点，如果你使用的相机总是在肖像，是加入这个小片段：

NSDictionary* imageOptions = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:6] forKey:CIDetectorImageOrientation]; 
NSArray* features = [detector featuresInImage:image options:imageOptions];

要弄清楚你是什么方位，如果你需要它动态找出你的方向。

检查kCGImagePropertyOrientation

来源

2012-07-19 12:06:02 sai

我怎么能检测LandScapeMode – siva 2012-07-23 11:51:17

检查kCGImagePropertyOrientation图像 – sai 2012-07-27 05:58:47

如果从相机拍摄图像未检测到使用UIImagePickerControllerSourceTypeCamera

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