visual-studio OpenCV findContours 函数问题
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/3087720/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
OpenCV findContours function problem
提问by user123668
I am trying to use the findContours function in OpenCV, but VS 2008 gives an error saying:
我试图在 OpenCV 中使用 findContours 函数，但 VS 2008 给出了一个错误说：
OpenCV Error: Bad flag (parameter or structure field) (Unrecognized or unsupport ed array type) in unknown function, file ........\ocv\opencv\src\cxcore\cxarr ay.cpp, line 2476
OpenCV 错误：未知函数中的错误标志（参数或结构字段）（无法识别或不支持的数组类型），文件 ........\ocv\opencv\src\cxcore\cxarr ay.cpp，第 2476 行
This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information. Press any key to continue . . .
此应用程序已请求运行时以一种不寻常的方式终止它。请联系应用程序的支持团队了解更多信息。按任意键继续 。. .
Here's the code:
这是代码：
Mat_<Vec<float,3>> originalimage;
Mat_<Vec<float,3>> resultingimage;
vector<vector<cv::Point>> v;
originalimage = cv::imread("Original.ppm");
cv::findContours(originalimage,v,CV_RETR_LIST,CV_CHAIN_APPROX_NONE);
Thanks in advance
提前致谢
回答by dnul
FindContours only accepts binary image. That is , any image which is output of cvThreshold cvAdapiveThreshold cvCanny
FindContours 只接受二进制图像。也就是说，任何图像是 cvThreshold cvAdapiveThreshold cvCanny 的输出
try adding this statement before cv::findContours
尝试在 cv::findContours 之前添加此语句
cvThreshold(originalImage,resultingImage,100,100,CV_THRESH_BINARY)
then call findcontours with resultingImage.
然后使用resultingImage调用findcontours。
if it works then you should input the correct parameters to cvThreshold ( 100 is just an example).Check the reference for that matter.
如果它有效，那么你应该向 cvThreshold 输入正确的参数（100 只是一个例子）。检查参考资料。
EDIT: resultingImage should be a single channel image!!
编辑：resultingImage 应该是单通道图像！！
回答by NotNamedDwayne
I have had the same problem (or at least a similar one) with that function. I was not able to fix it, so I used the old C style cvFindContours function instead. I have included an example function in wich I used the cvFindContours function to clean up a blob image. This might not be the fastest solution, but at leas it works.
我在该功能上遇到了同样的问题（或至少是类似的问题）。我无法修复它，所以我改用旧的 C 风格 cvFindContours 函数。我在其中包含了一个示例函数，我使用 cvFindContours 函数来清理 blob 图像。这可能不是最快的解决方案，但至少它有效。
void filtBproject(Mat& Bproject){
Scalar color = CV_RGB(255,255,255); // text color
IplImage* BprojectIpl = &IplImage(Bproject);
CvMemStorage* storage = cvCreateMemStorage(0);
CvSeq* contours = 0;
int numCont = 0;
int contAthresh = 45;
numCont= cvFindContours( BprojectIpl, storage, &contours, sizeof(CvContour),
CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0) );
cvSet(BprojectIpl, cvScalar(0,0,0));
for( ; contours != 0; contours = contours->h_next )
{
if ( (cvContourArea(contours, CV_WHOLE_SEQ) > contAthresh) ){
cvDrawContours( BprojectIpl, contours, color, color, -1, CV_FILLED, 8 );
}
}
}
回答by Douglas
For your v vector, you need to add a space like so:
对于您的 v 向量，您需要像这样添加一个空格：
vector<vector<cv::Point> > v;
Very subtle and dumb but it works.
非常微妙和愚蠢，但它有效。
