objective-c++ - “cv::face::FaceRecognizer”中没有名为“getMat”的成员

Question

@interface FJFaceRecognizer () {
    Ptr<FaceRecognizer> _faceClassifier;
}

@property (nonatomic, strong) NSMutableDictionary *labelsDictionary;

@end

@implementation FJFaceRecognizer

    - (NSArray *)labels {

在下一行我收到错误消息No member named 'getMat' in 'cv::face::FaceRecognizer'，使用 OpenCV 3.0 时：

        cv::Mat labels = _faceClassifier->getMat("labels");

        if (labels.total() == 0) {
            return @[];
        }
        else {
            NSMutableArray *mutableArray = [NSMutableArray array];
            for (MatConstIterator_<int> itr = labels.begin<int>(); itr != labels.end<int>(); ++itr ) {
                int lbl = *itr;
                [mutableArray addObject:@(lbl)];
            }
            return [NSArray arrayWithArray:mutableArray];
        }
    }
}

我应该使用什么来代替getMatOpenCV 3.0？

Answer 1

如果你想要std::vector<int>标签，你应该可以使用getLabelsByString

http://docs.opencv.org/master/dd/d65/classcv_1_1face_1_1FaceRecognizer.html

可能值得查看从 2 到 3 的过渡指南

http://docs.opencv.org/master/db/dfa/tutorial_transition_guide.html