OpenCV iOS程序检测用户的嘴巴并测量宽度和高度答案

【问题标题】：OpenCV iOS program to detect user's mouth and measure width and heightOpenCV iOS程序检测用户的嘴巴并测量宽度和高度
【发布时间】：2017-04-12 10:43:38
【问题描述】：

我正在尝试使用 OpenCV iOS 程序来检测用户的嘴巴并从实时视频中测量它的宽度和高度。我正在搜索但找不到 opencv 示例。有没有人遇到过这样的 Opencv/或任何其他 iOS 示例程序来检测用户的嘴巴并测量视频或图像的宽度和高度？请分享信息。

谢谢

【问题讨论】：

标签： ios opencv face-detection

【解决方案1】：

NSString *mouthCascadePath = [[NSBundle mainBundle] pathForResource:@"cascades/haarcascade_mcs_mouth"
                                                           ofType:@"xml"];//load the file from the app bundle
cv::Mat cvImage;
UIImageToMat(resImage, cvImage);
cvtColor(cvImage, gray, CV_BGR2GRAY); // load input img in gray scale mode
cv::CascadeClassifier mouthDetector;
mouthDetector.load([mouthCascadePath UTF8String]);
std::vector<cv::Rect> faceRects;
double scalingFactor = 1.1;
int minNeighbors = 2;
int flags = 0;
cv::Size minimumSize(30,30);
// Detect Faces
faceDetector.detectMultiScale(gray, faceRects,
                                   scalingFactor, minNeighbors, flags,
                                   cv::Size(30, 30) );

cv::Mat faceROI;

for(unsigned int i = 0; i < faceRects.size(); i++)
{
 std::vector<cv::Rect> mouthRects;
//Detect mouth in face
    mouthDetector.detectMultiScale(cvImage, mouthRects,
                                  scalingFactor, minNeighbors, flags,
                                  cv::Size(30, 30) );

        const cv:: Rect&mouth = mouthRects[0];
        int y = mouth.y - 0.15*mouth.height ;
        cv:: rectangle(cvImage, cv::Point(mouth.x ,y), cv::Point(mouth.x + mouth.width ,y + mouth.height), cvScalar(255,0,0), 1, 8, 0);
}
_imgview.image = MatToUIImage(cvImage);
}

复制上述代码，在 iOS 中使用 OpenCV 进行嘴部检测。

【讨论】：