OpenCV CvSeq 递归元素访问对于大图像失败？

发布于 2024-12-07 12:00:33 字数 1217 浏览 1 评论 0原文

我的开发环境是 Windows 7 上的 Mingw32 位 CMake。（相同的代码在 Linux 上运行良好）

我使用 cvFindContours() 使用 OpenCV 检测轮廓。

我使用递归方法遍历生成的 CvSeq 以按级别访问轮廓，如下所示：

void helperParseCurves(CvSeq* contour, int level) {


    //Travel same level contours
    if(contour->h_next != NULL) {
        helperParseCurves(contour->h_next, level);
    }
    if(contour->v_next != NULL) {
        helperParseCurves(contour->v_next, level+1);
    }
    //Travel child levels
    for(int i=0; i<contour->total; i++){

        //Try to access Point data -- Crash here when threshold level 114 ?
        //Works when uncommented
        CvPoint* p = CV_GET_SEQ_ELEM(CvPoint, contour, i);

    }
}

但是应用程序在 CvPoint* p = CV_GET_SEQ_ELEM(CvPoint,contour, i); 行处崩溃这种情况发生在某些特定的大图像上，并且在 Linux 中运行良好。

我已在 http://dl.dropbox 上传了一个示例程序来演示该场景

。 com/u/17399055/opencv-test.zip

*使用 CMake 下载并编译

*使用示例图像运行代码 - "OCvTest.exe test-img.tif"

*将滑块值更改为 114 左右，应用程序崩溃。

*如果第 #27 行被注释则工作正常。

对此有什么建议吗？

这可能是 OpenCV 的错误吗？

提前致谢。

原文

My development enviroment is Mingw32 bit CMake on Windows 7.(this same code works fine on Linux)

I use cvFindContours() to detect contours using OpenCV.

I use recursive method to traveser the resultant CvSeq to access the contours by level as follows:

void helperParseCurves(CvSeq* contour, int level) {


    //Travel same level contours
    if(contour->h_next != NULL) {
        helperParseCurves(contour->h_next, level);
    }
    if(contour->v_next != NULL) {
        helperParseCurves(contour->v_next, level+1);
    }
    //Travel child levels
    for(int i=0; i<contour->total; i++){

        //Try to access Point data -- Crash here when threshold level 114 ?
        //Works when uncommented
        CvPoint* p = CV_GET_SEQ_ELEM(CvPoint, contour, i);

    }
}

But the application crashes at the line CvPoint* p = CV_GET_SEQ_ELEM(CvPoint, contour, i);
This happens to some specific large images and works fine in Linux.

I have uploaded an sample program to demonstrate the scenario at

http://dl.dropbox.com/u/17399055/opencv-test.zip

*download and compile using CMake

*run the code using the sample image -
"OCvTest.exe test-img.tif"

*change the slider value around 114 , application crashes.

*if the line #27 is commented works fine.

Any tips on this ?

Could this be a OpenCV bug ?

thanks in advance.

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