c++ - CVMat : sizes of input arguments do not match

Question

我的代码打开带有路标的图像，检测它们，重新缩放到指定大小，然后将它们放入矩阵中。

vector<vector<Point> > contours; 
vector<Vec4i> hierarchy;    findContours(maski, contours, hierarchy,    CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE); 
Mat output1= Mat::zeros(cropImg.rows,cropImg.cols, CV_8UC3);
for(int i = 0; i < contours.size(); i++)
{
    drawContours(output1 , contours, i, Scalar(0,0,255), 1, 8, hierarchy );
    imshow("kontury z findContours", output1);
}

vector<Rect> boundRect( contours.size() );                    

Mat drawing1 = Mat::zeros(cropImg.size(), CV_8UC3 );
Mat image_roi = Mat::zeros(Size(1000,1000), CV_8UC3 );
Mat przeskalowane1;

for( int i = 0; i < contours.size(); i++ )
{ 
    double obwod = arcLength(Mat(contours[i]), true);
    if(obwod>150)
    {                                                    
        boundRect[i] = boundingRect(Mat(contours[i]));
        cout<<"Obwod: "<<obwod<<" Wymiar: "<<boundRect[i].width<<"x"<<boundRect[i].height<<endl;
        if(boundRect[i].height > 50 && boundRect[i].width > 50)
        {
            drawContours( drawing1, contours, i, Scalar(3, 200, 2), CV_FILLED, 8, hierarchy, 0, Point() ); 
            imshow("kontury brane pod uwage przed skalowaniem", drawing1);
            Rect mask(boundRect[i].x, boundRect[i].y, boundRect[i].width, boundRect[i].height);
            //cout << "#" << i << " rectangle x:" << mask.x << " y:" << mask.y << " " << mask.width << "x" << mask.height << endl;
            Mat image_roi = drawing1(mask);
            double wys = boundRect[i].height;
            double szer = boundRect[i].width;    
            double skala1 = wys/128;
            double y = wys/skala1;
            double x = szer/skala1;
            resize(image_roi, image_roi, Size(x,y));
            przeskalowane1.push_back(image_roi);


        } // ERROR in this line
    }
} 
if(przeskalowane1.cols > 0)
{   
    cout<<"Przeskalowane: "<<przeskalowane1.cols<<"x"<<przeskalowane1.rows<<endl;
    imshow("Przeskalowane", przeskalowane1);
    cvMoveWindow("Przeskalowane", 1128, 0);
    cvtColor(przeskalowane1, przeskalowane1, CV_BGR2GRAY);
} 

当只找到一个道路标志或图像中发现的标志与指定的尺寸非常相似时，一切正常。如果找到的标志大小不同，则会出现以下错误:

Error: Sizes of input arguments do not match <> in unknown function, file......\modules\core\src\matrix.cpp, line 598"

矩阵中有这些标志对我来说非常重要。

Answer 1

cv::Mat::push_back 的帮助页面方法说:

The methods add one or more elements to the bottom of the matrix. They emulate the corresponding method of the STL vector class. When elem is Mat , its type and the number of columns must be the same as in the container matrix.

因此，为了将多个图像添加到 przeskalowane1，您需要将它们重新调整为相同的宽度(而不是高度)。

Mat image_roi = drawing1(mask);
double wys = boundRect[i].height;
double szer = boundRect[i].width;    
double x = 128;
double skala1 = szer/x;
double y = wys/skala1;
resize(image_roi, image_roi, Size(x, y));