wxWidgets + OpenCV 矩形崩溃 OnButtonClick()

发布于 2025-01-05 11:53:37 字数 819 浏览 0 评论 0原文

我试图在单击 wxbutton 时在 OpenCV Mat 中绘制一个简单的矩形，但在调用矩形函数时程序崩溃。

void wxFrameFrame::OnButton1Click(wxCommandEvent& event) 
{
    Mat A(480,640,CV_32F);
    Point p1(10, 10);
    Point p2(20,200);
    rectangle(A, p1, p2, Scalar(255,0,255,0), 0);

    // Show what you got
    namedWindow( "src", CV_WINDOW_AUTOSIZE );
    imshow( "src", A );
}

我已经在控制台应用程序中尝试过这段代码并且工作正常。我还尝试将此代码放入 wxFrame 构造函数中，并且也可以正常工作。如果我评论矩形函数一切正常（它显示黑色图像）。

我已经遇到这个问题两天了，我最初的问题是我无法扭曲仿射图像，因为它也崩溃了。

我可以在图像中绘制

A.at<uchar>(0,0)=255

，并且我知道我可以执行 for 循环来绘制矩形。

我的环境是 Windows 7 64 位、OpenCv 2.3.1、wxWidgets 2.8.12 和 CodeBlocks 10.05

感谢任何帮助和想法，谢谢。

---edit----

我尝试过矩形、warpAffine 和 putText 函数，这三个函数在 OnButtonClick 内部调用时崩溃了。函数直线和圆工作正常。

原文

I am trying to draw a simple rectangle in a OpenCV Mat when a wxbutton is clicked, but program crash when calls rectangle function.

void wxFrameFrame::OnButton1Click(wxCommandEvent& event) 
{
    Mat A(480,640,CV_32F);
    Point p1(10, 10);
    Point p2(20,200);
    rectangle(A, p1, p2, Scalar(255,0,255,0), 0);

    // Show what you got
    namedWindow( "src", CV_WINDOW_AUTOSIZE );
    imshow( "src", A );
}

I have tried this code in a console application and works fine. I have also tried to put this code in the wxFrame constructor and works fine too. If I comment the rectangle function all is ok (it shows a black image).

I have this problem for two days now, my original problem was I couldn't warpAffine an image because it crashed too.

I can draw in the image with

A.at<uchar>(0,0)=255

and I know I can do a for loop to draw the rectangle.

My environment is Windows 7 64-bit, OpenCv 2.3.1, wxWidgets 2.8.12 and CodeBlocks 10.05

Any help and idea is appreciated,
Thanks.

---edit----

I have tried the functions rectangle, warpAffine and putText and the three crashed when called inside OnButtonClick. The functions line and circle work fine.

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本宫微胖 2025-01-12 11:53:37

看起来问题出在矩形例程中。 OpenCV 中有这个东西吗？或者wxFrameFrame的方法？

我要尝试的第一件事是查看矩形是否存在传递自动值的问题，一旦调用它就会超出范围。

试试这个

void wxFrameFrame::OnButton1Click(wxCommandEvent& event) 
{
    static Mat A(480,640,CV_32F);
    static Point p1(10, 10);
    static Point p2(20,200);
    static Scaler s(255,0,255,0);
    static int n = 0;
    rectangle(A, p1, p2, s, n);

    ...

It looks like the problem is in the rectangle routine. Is this something in OpenCV? or a method of wxFrameFrame?

The 1st thing I would try is to see if rectangle is having a problem with being passed automatics that go out of scope as soon as it is called.

Try this

void wxFrameFrame::OnButton1Click(wxCommandEvent& event) 
{
    static Mat A(480,640,CV_32F);
    static Point p1(10, 10);
    static Point p2(20,200);
    static Scaler s(255,0,255,0);
    static int n = 0;
    rectangle(A, p1, p2, s, n);

    ...

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