iOS - Xcode - OpenCV - findContours 错误

Question

findContours导致以下错误：

2017-09-22 16:50:05.396700+0200 OpenCVLiveCamera[7827:3041522] [MC] systemgroup.com.apple.configurationprofiles 路径的系统组容器是/private/var/containers/Shared/SystemGroup/systemgroup.com.apple .configurationprofiles
2017-09-22 16:50:05.397011+0200 OpenCVLiveCamera[7827:3041522] [MC] 从公共有效用户设置中读取。
OpenCV 错误：断言失败 (mtype == type0 || (CV_MAT_CN(mtype) == CV_MAT_CN(type0) && ((1 << type0) & fixedDepthMask) != 0)) in create, file /Volumes/build-storage/ build/master_iOS-mac/opencv/modules/core/src/matrix.cpp，第 2601 行 libc++abi.dylib：以 cv::Exception 类型的未捕获异常终止：/Volumes/build-storage/build/master_iOS-mac /opencv/modules/core/src/matrix.cpp:2601: 错误: (-215) mtype == type0 || (CV_MAT_CN(mtype) == CV_MAT_CN(type0) && ((1 << type0) & fixedDepthMask) != 0) 在函数中创建

代码：

void getContours(cv::Mat &srcImage){
    cv::Mat dstImage = srcImage;
    // Convert it to gray
    cvtColor( srcImage, srcImage, CV_BGR2GRAY );
    // Threshold
    threshold(srcImage, srcImage, 192.0, 255.0, cv::THRESH_BINARY_INV);
    // Find Contours to find chains of consecutive edge pixels
    std::vector<std::vector<Point> > contours;
    findContours(srcImage, contours, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_NONE);
    // Draw contours on image
    //....
}

请帮忙。 谢谢

Answer 1

通过将Point更改为cv::Point in 解决

 std::vector<std::vector<cv::Point> > contours;

Answer 2

findContours更改输入图像，因此无法显示。 试试

threshImg = srcImg.clone()
findContours(threshImg, contours, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_NONE);