我正在针对视频(文件)运行运动检测算法并遵循代码示例运动检测，并试图找到每个组件的角度和整体运动。我确实得到了一个运动值，带有 Blob 等，但每个组件的运动方向始终是 0 度或 360 度，没有任何意义。我可能做错了什么？请帮忙，谢谢。

这是构造函数

_motionHistory = new MotionHistory(
                                              10.0, //in second, the duration of motion history you wants to keep
                                              0.05, //in second, parameter for cvCalcMotionGradient
                                              0.5); //in second, parameter for cvCalcMotionGradient

foreach (MCvConnectedComp comp in motionComponents)
                    {
                        //reject the components that have small area;
                        if (comp.area < 1) continue;

                        // find the angle and motion pixel count of the specific area
                            double angle, motionPixelCount;
                            _motionHistory.MotionInfo(comp.rect, out angle, out motionPixelCount);

                            string motion_direction = GetMotionDescriptor(comp.rect);
Console.writeline (motion_direction);


                    }

                    // find and draw the overall motion angle
                    double overallAngle, overallMotionPixelCount;
                    _motionHistory.MotionInfo(motionMask.ROI, out overallAngle, out overallMotionPixelCount);

private string GetMotionDescriptor(Rectangle motionRegion)
        {
            float circleRadius = (motionRegion.Width + motionRegion.Height) >> 2;
            Point center = new Point(motionRegion.X + motionRegion.Width >> 1, motionRegion.Y + motionRegion.Height >> 1);

            int xDirection = (int)(Math.Cos(angle * (Math.PI / 180.0)) * circleRadius);
            int yDirection = (int)(Math.Sin(angle * (Math.PI / 180.0)) * circleRadius);
            //double movementAngle = Math.Atan(xDirection / yDirection) * 180 / Math.PI;
            Point pointOnCircle = new Point(center.X + xDirection, center.Y - yDirection);
            double slope = (double)(pointOnCircle.Y - center.Y)/(double)(pointOnCircle.X - center.X);
            double ang = Math.Atan(slope) * 180/Math.PI;
            return (ang).ToString() + " degrees";
        }

最佳答案

啊哈!如果有人遇到同样的问题，我找出原因并在此处发布。这

_motionHistory = new MotionHistory(mhi, maxDelta, minDelta); 

https://stackoverflow.com/questions/7714169/