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OpenCV-cvBlob_Opencv_Blob - Fatal编程技术网

OpenCV-cvBlob

OpenCV-cvBlob,opencv,blob,Opencv,Blob,请解释以下代码: struct CvTrack { CvID id; ///< Track identification number. CvLabel label; ///< Label assigned to the blob related to this track. unsigned int minx; ///< X min. unsigned int maxx; ///< X max. unsigned int min

请解释以下代码:

 struct CvTrack  
 {
   CvID id; ///< Track identification number. 
   CvLabel label; ///< Label assigned to the blob related to this track.

   unsigned int minx; ///< X min.
   unsigned int maxx; ///< X max.
   unsigned int miny; ///< Y min.
   unsigned int maxy; ///< y max.

   CvPoint2D64f centroid; ///< Centroid.

   unsigned int lifetime; ///< Indicates how much frames the object has been in scene.
   unsigned int active; ///< Indicates number of frames that has been active from last inactive period.
   unsigned int inactive; ///< Indicates number of frames that has been missing.
   unsigned int speed;
 };

变量active和inactive的用途是什么?

我假设问题是关于对象跟踪的,代码中的注释基本上回答了您的问题

假设你正在跟踪一个粉红色的球在桌子上滚动

Inactive是球被遮挡并对摄影机不可见的帧数

Active是摄影机可以看到球的连续帧数

如果球在当前帧中连续可见并突然变为不可见,则会发生以下情况:

lifetime++;
inactive++;
active = 0;

这将使您更好地了解如何保持被跟踪对象的轨迹。

Shan,是什么原因导致此变量增加?是否会使两个对象更接近,并合并为帧中缺少的一个对象,或者当对象未检测到当前帧时的非活动增量…您提到的两种情况都会增加非活动计数。在案例1中:2个球将有2个轨迹,因此如果它合并为一个轨迹,其中一个轨迹将增加非活动变量。这只是案例2的一个特例。当前帧中未检测到跟踪对象时,非活动变量增加。