C++ OpenCV:无法将数据正确传递给函数

使用MSVS2010在Windows上编译

int foo(unsigned short int *values,  unsigned int nSamples)
{
    cout<<"address in PlotMeNow"<<endl;
    cout<<&values[0]<<endl; 
    cout<<"values in PlotMeNow"<<endl;

    for(int i=0;i<5;i++){
        cout<<values[i]<<endl;
    }
    return 0;  
}

unsigned short int * IterateLine(Mat image)
{
    LineIterator it(image, Point(1,1), Point(5,5), 8);
    vector<ushort> buf;

    for(int i = 0; i < it.count; i++, it++){
        buf.push_back(image.at<ushort>(it.pos()));
    }

    std::vector<ushort> data(5);
    data=buf; 

    cout<<"the  address in the iterateLine() is"<<endl; 
    cout<<&data[0]<<endl; 

    cout<<"values in IterateLine"<<endl;
    for(int i=0;i<5;i++){
        cout<<data[i]<<endl;
    }
     return &data[0]; 
}

int main()
{

    Mat img = imread("sir.png", CV_LOAD_IMAGE_ANYCOLOR | CV_LOAD_IMAGE_ANYDEPTH);
    unsigned short int * x ; 
    //Iterate through the line  
    x =  IterateLine(img); 

    int n=5; 
    foo(&x[0], n);

    cout<<"The address in main() is"<<endl; 
    cout<<x<<endl; 
    cout<<"values in main are"<<endl;

    for(int i=0;i<5;i++){  
        cout<<x[i]<<endl;
    }     
    getch();
    return 0 ; 
}

在下面的代码中，我尝试使用行迭代器，然后在沿行提取像素值后，我尝试将提取的数据传递给函数

foo（）

：

int foo(unsigned short int *values,  unsigned int nSamples)
{
    cout<<"address in PlotMeNow"<<endl;
    cout<<&values[0]<<endl; 
    cout<<"values in PlotMeNow"<<endl;

    for(int i=0;i<5;i++){
        cout<<values[i]<<endl;
    }
    return 0;  
}

unsigned short int * IterateLine(Mat image)
{
    LineIterator it(image, Point(1,1), Point(5,5), 8);
    vector<ushort> buf;

    for(int i = 0; i < it.count; i++, it++){
        buf.push_back(image.at<ushort>(it.pos()));
    }

    std::vector<ushort> data(5);
    data=buf; 

    cout<<"the  address in the iterateLine() is"<<endl; 
    cout<<&data[0]<<endl; 

    cout<<"values in IterateLine"<<endl;
    for(int i=0;i<5;i++){
        cout<<data[i]<<endl;
    }
     return &data[0]; 
}

int main()
{

    Mat img = imread("sir.png", CV_LOAD_IMAGE_ANYCOLOR | CV_LOAD_IMAGE_ANYDEPTH);
    unsigned short int * x ; 
    //Iterate through the line  
    x =  IterateLine(img); 

    int n=5; 
    foo(&x[0], n);

    cout<<"The address in main() is"<<endl; 
    cout<<x<<endl; 
    cout<<"values in main are"<<endl;

    for(int i=0;i<5;i++){  
        cout<<x[i]<<endl;
    }     
    getch();
    return 0 ; 
}

图像为单通道16位png

int foo(unsigned short int *values,  unsigned int nSamples)
{
    cout<<"address in PlotMeNow"<<endl;
    cout<<&values[0]<<endl; 
    cout<<"values in PlotMeNow"<<endl;

    for(int i=0;i<5;i++){
        cout<<values[i]<<endl;
    }
    return 0;  
}

unsigned short int * IterateLine(Mat image)
{
    LineIterator it(image, Point(1,1), Point(5,5), 8);
    vector<ushort> buf;

    for(int i = 0; i < it.count; i++, it++){
        buf.push_back(image.at<ushort>(it.pos()));
    }

    std::vector<ushort> data(5);
    data=buf; 

    cout<<"the  address in the iterateLine() is"<<endl; 
    cout<<&data[0]<<endl; 

    cout<<"values in IterateLine"<<endl;
    for(int i=0;i<5;i++){
        cout<<data[i]<<endl;
    }
     return &data[0]; 
}

int main()
{

    Mat img = imread("sir.png", CV_LOAD_IMAGE_ANYCOLOR | CV_LOAD_IMAGE_ANYDEPTH);
    unsigned short int * x ; 
    //Iterate through the line  
    x =  IterateLine(img); 

    int n=5; 
    foo(&x[0], n);

    cout<<"The address in main() is"<<endl; 
    cout<<x<<endl; 
    cout<<"values in main are"<<endl;

    for(int i=0;i<5;i++){  
        cout<<x[i]<<endl;
    }     
    getch();
    return 0 ; 
}

可以看出，值

foo（）

和

main（）

是错误的。它应该与

IterateLine（）

报告的相同。由于地址的传递是正确的（见输出），所以使用指针，我应该从任何函数中获得相同的数据。但这并没有发生

int foo(unsigned short int *values,  unsigned int nSamples)
{
    cout<<"address in PlotMeNow"<<endl;
    cout<<&values[0]<<endl; 
    cout<<"values in PlotMeNow"<<endl;

    for(int i=0;i<5;i++){
        cout<<values[i]<<endl;
    }
    return 0;  
}

unsigned short int * IterateLine(Mat image)
{
    LineIterator it(image, Point(1,1), Point(5,5), 8);
    vector<ushort> buf;

    for(int i = 0; i < it.count; i++, it++){
        buf.push_back(image.at<ushort>(it.pos()));
    }

    std::vector<ushort> data(5);
    data=buf; 

    cout<<"the  address in the iterateLine() is"<<endl; 
    cout<<&data[0]<<endl; 

    cout<<"values in IterateLine"<<endl;
    for(int i=0;i<5;i++){
        cout<<data[i]<<endl;
    }
     return &data[0]; 
}

int main()
{

    Mat img = imread("sir.png", CV_LOAD_IMAGE_ANYCOLOR | CV_LOAD_IMAGE_ANYDEPTH);
    unsigned short int * x ; 
    //Iterate through the line  
    x =  IterateLine(img); 

    int n=5; 
    foo(&x[0], n);

    cout<<"The address in main() is"<<endl; 
    cout<<x<<endl; 
    cout<<"values in main are"<<endl;

    for(int i=0;i<5;i++){  
        cout<<x[i]<<endl;
    }     
    getch();
    return 0 ; 
}

为什么会发生这种情况？如何正确地将数据传递到

foo（）

void IterateLine（常数矩阵和图像、向量和线像素、点p1、点p2）
int foo(unsigned short int *values,  unsigned int nSamples)
{
    cout<<"address in PlotMeNow"<<endl;
    cout<<&values[0]<<endl; 
    cout<<"values in PlotMeNow"<<endl;

    for(int i=0;i<5;i++){
        cout<<values[i]<<endl;
    }
    return 0;  
}

unsigned short int * IterateLine(Mat image)
{
    LineIterator it(image, Point(1,1), Point(5,5), 8);
    vector<ushort> buf;

    for(int i = 0; i < it.count; i++, it++){
        buf.push_back(image.at<ushort>(it.pos()));
    }

    std::vector<ushort> data(5);
    data=buf; 

    cout<<"the  address in the iterateLine() is"<<endl; 
    cout<<&data[0]<<endl; 

    cout<<"values in IterateLine"<<endl;
    for(int i=0;i<5;i++){
        cout<<data[i]<<endl;
    }
     return &data[0]; 
}

int main()
{

    Mat img = imread("sir.png", CV_LOAD_IMAGE_ANYCOLOR | CV_LOAD_IMAGE_ANYDEPTH);
    unsigned short int * x ; 
    //Iterate through the line  
    x =  IterateLine(img); 

    int n=5; 
    foo(&x[0], n);

    cout<<"The address in main() is"<<endl; 
    cout<<x<<endl; 
    cout<<"values in main are"<<endl;

    for(int i=0;i<5;i++){  
        cout<<x[i]<<endl;
    }     
    getch();
    return 0 ; 
}

{
行迭代器it（图像，p1，p2，8）；
for（int i=0；i

您正在从

IterateLine

返回指向本地数据的指针。这是未定义的行为。您应该先解决这个问题。@juanchopanza但当地址相同时，为什么数据会不同？因为其他东西会将其他数据放在那里，因为它可以？@juanchopanza地址001195D8和001195D8+1处的值对于不同的函数不能不同。我错了吗？谁在乎？你有未定义的行为。这是一个错误。首先修复它。谢谢，我必须为点（X1，X2），点（Y1，Y2）传递第三个参数。我的函数有三个参数。