c++ - 拆分子图像是openCV中的错误

Question

我有一张由多行组成的泰文文本图像。我想将图像拆分为单独的文本行，并且可以检查行数。问题是当我拆分子图像时会产生错误。

我的代码

vector<int> point;
//Function Check Line
int checkLine(cv::Mat imgSrc){

    int temp=-1;
    int line=0;
    int CountI[32767], CountJ[32767];
    int countRange=0;
    int maxBlack = INT_MIN;

    point.clear();

    for(int y=0;y<imgSrc.size().height;y++)
     {
        for(int x=0;x<imgSrc.size().width;x++)
        {
            if(imgSrc.at<uchar>(y,x)==0){
                //cout<<y<<":";
                if(y-temp>1){
                    point.push_back(temp);
                    point.push_back(y);
                }
                temp=y;
                break;
            }
        }
    }

    point.push_back(temp);
    point.erase(point.begin(), point.begin()+1);

    for(vector<int>::size_type i = 0; i<point.size(); i++){
        CountI[i]=point[i];
    }

    for(vector<int>::size_type j = 0; j<point.size()-1; j+=2){
        CountJ[countRange++]=point[j+1]-point[j];
    }

    for(int i=0;i<countRange;i++){
        if(CountJ[i]>maxBlack) maxBlack=CountJ[i];
    }

    for(int i=0;i<countRange;i++){
        if(CountJ[i]>(maxBlack*0.5)) line++;
    }

    return line;
}


//Function Line Rect 
vector<cv::Mat> lineRect(cv::Mat imgSrc, vector<int> startPoint, vector<int> stopPoint)     {
    vector <cv::Mat> img_split;
    img_split.clear();
    for(vector<int>::size_type k = 0; k<startPoint.size(); k++){
        img_split.push_back(imgSrc(cv::Rect(0,startPoint[k],     imgSrc.cols,stopPoint[k]-startPoint[k])));
    }

    return img_split;
}    

int main()
{
    const string path = "D:\\\exam.jpg";
    cv::Mat img_src = imread(path,0);
    vector<cv::Mat> img_split;
    cv::Mat img_tmp;
    vector<int> startPoint;
    vector<int> stopPoint;
    vector<int> PBlackFont;
    vector<int> PBlackBack;
    vector<int> pointW;
    int line=-1;
    int check=-1;


    line = checkLine(img_src);
    int textLine = line;
    for(int k=0;k<textLine;k++){
        cout<<line<<endl;
        if(check==1){
              img_tmp = imread("D:\\buff\\tmp1.jpg",1);
        }
        else if(check==2){

            img_tmp = imread("D:\\buff\\tmp2.jpg", 1);
        }
        else if(check==-1){
            img_tmp = img_src;
        }

        if(line>1){
            PBlackFont.clear();
            PBlackBack.clear();
            pointW.clear();
            for(int i = 1; i<point.size()-1; i+=2){
                pointW.push_back((point[i+1]-1)-(point[i]+1));
                PBlackFont.push_back(point[i+1]-1);
                PBlackBack.push_back(point[i]+1);
            }

            int max=INT_MIN, index=-1;
            for(int j = 0; j<pointW.size(); j++){
                if(pointW[j]>max) {
                    max=pointW[j];
                    index=j;
                }
            }

            startPoint.clear();
            stopPoint.clear();
            startPoint.push_back(point[0]);
            startPoint.push_back(PBlackFont[index]);
            stopPoint.push_back(PBlackBack[index]);
            stopPoint.push_back(point[point.size()-1]);

            img_split.clear();
            img_split = lineRect(img_tmp, startPoint, stopPoint);
            if(img_split[0].size().height>img_split[1].size().height){
                char buff[3];
                std::string nameindex = itoa(1, buff, 10);
                std::string name = "crop "+nameindex;
                cv::imshow(name, img_split[1]);
                cv::imwrite("D:\\Buff\\tmp1.jpg", img_split[0]);
                img_tmp = imread("D:\\Buff\\tmp1.jpg", 1);
                cv::imshow("Crop1", img_tmp);
                line = checkLine(img_tmp);
                check=1;
            }
            else {
                char buff[3];
                std::string nameindex = itoa(2, buff, 10);
                std::string name = "crop "+nameindex;
                cv::imshow(name, img_split[0]);
                cv::imwrite("D:\\Buff\\tmp2.jpg", img_split[1]);
                Mat img_tmp = imread("D:\\Buff\\tmp2.jpg", 1);
                cv::imshow("Crop2", img_tmp);
                line = checkLine(img_tmp);
                check=2;
            }
        }  
        else {
            startPoint.push_back(point[0]);
            stopPoint.push_back(point[point.size()-1]);

            char buff[3];
            std::string nameindex = itoa(3, buff, 10);
            std::string name = "crop "+nameindex;
            cv::Mat img_t = img_split[0];
            img_split = lineRect(img_t, startPoint, stopPoint);
            cv::imshow(name, img_split[0]);
        }
    }

错误

Unhandled exception at 0x74dd969b in test.exe: Microsoft C++ exception: cv::Exception at memory location 0x0014ed88..

和

在控制台中

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 unknown function,file ..\..\..\src\opencv\modules\core\src\matrix.cpp, line 323