OpenCv断言失败

我正在寻找在2D图像中找到人脸的应用程序，后来在同一图像中我想找到嘴巴，但我现在有一些问题。这是我的代码到目前为止：OpenCv断言失败

for (int i = 0; i < faces.size(); i++) 
{ 
     Point pt1(faces[i].x, faces[i].y); 
     Point pt2((faces[i].x + faces[i].height), (faces[i].y + faces[i].width)); 
     rectangle(frame, pt1, pt2, Scalar(255,0 , 0), 2, 8, 0); 

        //I WANT ROI(FOR MOUTH DETECTION) TO BE ONLY HALF OF THE RECTANGLE WITH FACE 
     Rect mouthROI; 
     mouthROI.x = (faces[i].x); 
     mouthROI.y = faces[i].y*(1.5); 
     mouthROI.width = (faces[i].x + faces[i].height); 
     mouthROI.height = (faces[i].y + faces[i].width); 

        //I CHECK IF NEW RECTANGLE IS EXACTLY BOTTOM HALF OF PREVIOUS ONE 
     Point ptAA(mouthROI.x, mouthROI.y); 
     Point ptBB(mouthROI.width, mouthROI.height); 
     rectangle(frame, ptBB, ptAA, Scalar(0,0 , 255), 2, 2, 0); 


     Mat image_roi = frame(mouthROI); 

     cvtColor(frame, frame_gray, COLOR_BGR2GRAY); 
     equalizeHist(frame_gray, frame_gray); 

        // DETECTING MOUTH INSIDE ROI OF EARLIER DETECTED FACE 
     mouth_cascade.detectMultiScale(image_roi, mouths, 1.1, 2, 0, Size(30, 30)); 

     for(int i = 0; i < mouths.size(); i++) 
     { 
      Point pt1(mouths[i].x, mouths[i].y); // Display detected faces on main window - live stream from camera 
      Point pt2((mouths[i].x + mouths[i].height), (mouths[i].y + mouths[i].width)); 
      rectangle(frame, pt1, pt2, Scalar(0, 255, 0), 2, 8, 0); 
     } 

}

不幸的是，这段代码不起作用。我得到这样的错误：

OpenCV Error: Assertion failed (0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows) in cv::Mat::Mat(const cv::Mat&, const cv::Rect&), file C:/build/2_4_PackSlave-win32-vc11-shared/opencv/modules/core/src/matrix.cpp, line 323

我该如何解决这个错误。谢谢大家的帮助！

来源

2014-01-21 user2592968

您传递给引发声明的函数的参数不正确。使用调试器来确定哪个函数正在抛出assert并将其跟踪到您的代码中发起调用的行。 –

错误在于此地点'mat image_roi = frame（mouthROI）;'，但我仍然不知道为什么... – user2592968

检查出[类似链接]（http://stackoverflow.com/questions/20855192/assertion- error-in-grabcut）并查看你是否没有提交相同的错误。 – BlueSword

您初始化mouthROI的方式不正确。它应该是这样的，而不是，

<previous code> 
mouthROI.width = (faces[i].height); 
mouthROI.height = (faces[i].width); 

Point ptAA(mouthROI.x, mouthROI.y); 
Point ptBB(mouthROI.x+mouthROI.width, mouthROI.y+mouthROI.height);

记住，简历::矩形不走位置矩形的，它需要左上角和宽度位置和高度 ..有关更多详细信息，请参阅documentation。

HTH

来源

2014-01-21 04:23:24 scap3y

OpenCv断言失败

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