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我正在写一篇论文，连续 3 天我被我的代码中的一个错误阻止了，看在上帝的份上，似乎无法修复它。

这个想法很简单，我有一张带有 3 个黑角的地图（就像 QR 码一样）。我得到了 3 个黑色角中心坐标和最后一个点的坐标（点 D） 我想将此区域提取到文件中，以使地图始终指向 0、90、180、270,360 度的角度。我搜索了互联网并找到了一个涉及 RotatedRectangle 的解决方案。这是一些有效的代码：

public static RotatedRect getRotatedRect(List<Point> orderedPointList, Point D){// here i have as parameters Points(in this order) Top Right and Bottom + the final calculated point(Point D);
    if(orderedPointList==null)
        return null;
    RotatedRect rect = new RotatedRect();
    Point Top = orderedPointList.get(0);
    Point Right = orderedPointList.get(1);
    Point Bottom = orderedPointList.get(2);
    Point[] points= new Point[]{Top,Right,D,Bottom};
    rect.points(points);
    Point Center = new Point();
    Center.x=(Bottom.x+Right.x)/2;
    Center.y=(Bottom.y+Right.y)/2;
    rect.center = Center;
    double diference1=Top.x-Bottom.x;
    double difference2=Top.y-Bottom.y;
    double angle=Math.atan(diference1-difference2) * 180/Math.PI;// this formula is used to see how much the map is rotated untill now i haven't tested it for all degrees but as i see it returns -180 0 180.
    rect.angle=angle;
    double mapwidth=Math.sqrt((Right.x-Top.x)*(Right.x-Top.x)+(Right.y-Top.y)*(Right.y-Top.y));
    double mapheight=Math.sqrt((Bottom.x-Top.x)*(Bottom.x-Top.x)+(Bottom.y-Top.y)*(Bottom.y-Top.y));
    rect.size.width=mapwidth;
    rect.size.height=mapheight; // here i set the RotatedRectangle width and height.
    return rect;
}

但是，无论我做什么，以下代码都不起作用：

public static Mat getRotatedRectMat(Mat mImage,RotatedRect rect){
    if(rect==null)
        return null;
     Mat M  = new Mat();
     Mat rotated = new Mat();
     Mat clone=mImage.clone();
     //clone.convertTo(clone, CvType.CV_32F);
     //rotated.convertTo(rotated, CvType.CV_32F);
     // perform the affine transformation
     Rect boundingRect = rect.boundingRect();
     if(boundingRect.x >= 0 && boundingRect.y >=0
             && (boundingRect.x+boundingRect.width) < clone.cols() &&  
               (boundingRect.y+boundingRect.height) < clone.rows() ){
         Mat cropped=new Mat();
         M = Imgproc.getRotationMatrix2D(rect.center, rect.angle, 0.5);
         Imgproc.warpAffine(clone, rotated, M, clone.size(), Imgproc.INTER_AREA);
         Imgproc.getRectSubPix(rotated, rect.size, rect.center, cropped);//CRASHES exactly right here
reason:Noone knows
         return cropped;

     }

我在执行 e.message() 时得到的错误是： cv::Exception: /home/reports/ci/slave_desktop/50-SDK/opencv/modules/imgproc/src/samplers.cpp:556: error: ( -210) 在函数 void cvGetRectSubPix(void const, void, CvPoint2D32f)

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