Iphone CIFaceFeature仅适用于LandscapeLeft

下面介绍如何进行人脸检测（教程仅在视频中提供，未在线编写，因此我无法发布直接链接）。基本上，我已经让人脸检测开始工作，但前提是手机处于LandscapeLeft模式

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你知道为什么会这样吗？

没有看到你的代码很难说，但我猜你没有设置

CIDetectorImageOrientation

？当图像方向与探测器方向设置不匹配时，检测失败

下面的一些代码-不是剪切粘贴，而是一个粗略的示例

- (void)detectFacialFeatures:(UIImage *)image withHighAccuracy:(BOOL) highAccuracy
{

CIImage* ciImage = [CIImage imageWithCGImage:sourceImage.CGImage];

if (ciImage == nil){
    printf("ugh \n");
    // bail
}

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

    NSString *accuracy = highAccuracy ? CIDetectorAccuracyHigh : CIDetectorAccuracyLow;

    NSDictionary* options = [NSDictionary dictionaryWithObjectsAndKeys:
                             CIDetectorAccuracyHigh, CIDetectorAccuracy,
                             orientation, CIDetectorImageOrientation,
                             nil];

    CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace 
                                              context:nil options:options];

    NSArray *features = [detector featuresInImage:ciImage];

    NSLog(@"features %@", features);

});
}

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没有看到您的代码很难说，但我猜您没有设置

CIDetectorImageOrientation

？当图像方向与探测器方向设置不匹配时，检测失败

下面的一些代码-不是剪切粘贴，而是一个粗略的示例

- (void)detectFacialFeatures:(UIImage *)image withHighAccuracy:(BOOL) highAccuracy
{

CIImage* ciImage = [CIImage imageWithCGImage:sourceImage.CGImage];

if (ciImage == nil){
    printf("ugh \n");
    // bail
}

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

    NSString *accuracy = highAccuracy ? CIDetectorAccuracyHigh : CIDetectorAccuracyLow;

    NSDictionary* options = [NSDictionary dictionaryWithObjectsAndKeys:
                             CIDetectorAccuracyHigh, CIDetectorAccuracy,
                             orientation, CIDetectorImageOrientation,
                             nil];

    CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace 
                                              context:nil options:options];

    NSArray *features = [detector featuresInImage:ciImage];

    NSLog(@"features %@", features);

});
}

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耶！别忘了接受答案。我得到的分数越多。。。我们做妓女有什么好处？我忘了。：-）耶！别忘了接受答案。我得到的分数越多。。。我们做妓女有什么好处？我忘了。：-）