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首页> 外文期刊>Journal of Neuroscience Methods >An automatic 3D tracking system with a PC and a single TV camera.
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An automatic 3D tracking system with a PC and a single TV camera.

机译:具有PC和单个电视摄像机的自动3D跟踪系统。

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We developed a novel system, for tracking a freely moving object (animal) in a limited 3D space, based on a closed loop TV and PC. Instead of using a pair of TV cameras to capture the 3D scene through the pair of its orthogonal projections, the system captures these projections by using a single TV camera. The direct view of the scene (e.g. its ground plan, i.e. projection onto the x-y plane) is captured together with its side projection, (i.e. projection onto the z-x plane) observed in a slanted mirror. The system uses a simple detection algorithm and hardware that were originally developed for 2D tracking of a single, contrast object on a stable and homogeneous background. All three coordinates of the tracked object are evaluated, displayed and stored in real-time, at 25 interlaced frames (samples) per second. The system was implemented on an IBM PC enhanced by an universal I/O board (Kaminsky, Yu, Krekule, I. Universal multifunctional IBM PC I/O board for clinical examinations and experimental research in neuroscience. Physiol Res 1994;43:193-199) and tested by tracking a LED marker, a small living fish in a water tank and a pair of LED markers which were activated one at the time in alternating TV frames thereby demonstrating the ability to simultaneously track two or more objects in 3D.
机译:我们开发了一种新颖的系统,用于基于闭环电视和PC在有限的3D空间中跟踪自由移动的物体(动物)。该系统不是使用一对电视摄像机通过一对正交投影来捕获3D场景,而是通过使用单个电视摄像机来捕获这些投影。在倾斜镜中观察到的场景的直接视图(例如其平面图,即在x-y平面上的投影)与侧面投影(即在z-x平面上的投影)一起被捕获。该系统使用了一种简单的检测算法和硬件,这些算法和硬件最初是为在稳定且均匀的背景下对单个对比对象进行2D跟踪而开发的。跟踪对象的所有三个坐标都以每秒25个隔行帧(样本)的速度进行实时评估,显示和存储。该系统在由通用I / O板(Kaminsky,Yu,Krekule,I。通用多功能IBM PC I / O板增强的用于神经科学的临床检查和实验研究的IBM PC上实施。PhysiolRes 1994; 43:193- 199),并通过跟踪LED标记,水箱中的一条小活鱼和一对LED标记进行了测试,这两个LED标记一次在交替的电视帧中被激活,从而证明了能够同时跟踪3D中的两个或多个对象的能力。

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