Object Tracker

物体跟踪器

Object Tracker

物体跟踪器

Prior to Release 18 it was only possible to solve the recording camera based on video material (in the following referred to as ,camera tracking’) but now the Object Tracker makes it possible to track movement within the footage that moves independently of the recording camera.

在第18版之前，只能解决基于视频材质的录像摄像机(在下文中称为，摄像机跟踪’) ，但是现在物体跟踪器使得在独立于录像摄像机的镜头中跟踪运动成为可能。

If the checkered pattern below were in motion it can be tracked and a 3D plane can be created, for example, whose motion behaves correctly with regard to perspective.

如果下面的方格图案处于运动状态，它就可以被跟踪，并且创建一个三维平面，例如，它的运动行为与透视相关。

Make sure that the tracked object has numerous, easily recognizable markings (e.g., stuck on "x"s on all tracked objects) that Cinema 4D can use as clearly assigned Tracks.

确保被跟踪的物体有许多易于识别的标记(例如，在所有被跟踪的物体上粘上“ x”) ，Cinema 4D 可以用作明确指定的轨道。

The Object Tracker only works in conjunction with a Motion Tracker object (which contains Tracks). This link (see also Motion Tracker) is made automatically when a Motion Tracker object exists when an Object Tracker object is created. Otherwise it will be linked with the currently selected Motion Tracker object.

对象跟踪器只能与运动跟踪器对象(其中包含轨道)结合使用。当创建一个物体跟踪器对象时，当一个物体跟踪器对象存在时，这个链接(也参见运动跟踪器)会自动生成。否则将与当前选定的运动跟踪器对象链接。

If multiple regions within the video footage have to be tracked, create a separate Object Tracker object for each region (still with a single Motion Tracker object). Tracks can be assigned to different Object Tracker objects (in case you want to experiment with different Geometry Objects).

如果视频片段中有多个区域需要跟踪，那么为每个区域创建一个单独的物体跟踪器对象(仍然使用单个运动跟踪器对象)。轨道可以分配给不同的对象跟踪对象(如果你想体验不同的几何对象)。

Use

使用

Proceed as follows to create object tracking:

按照以下步骤创建对象跟踪:

1. Create a 创建一个Motion Tracker object 运动跟踪器对象
   
2. Load a video sequence into the 将视频序列加载到Footage 镜头 tab 标签
   
3. Create a sufficient number of Tracks for both the camera tracking (if desired) and the tracked object 为相机跟踪(如果需要)和跟踪对象创建足够数量的跟踪
   
4. Create an Object Tracker. This will automatically be linked with the Motion Tracker object that was created first 创建一个物体跟踪器。这将自动链接到首先创建的运动跟踪器对象
   
5. Select all Tracks (scroll through the footage to make sure all are selected) on the tracked object and assign them to the Object Tracker (RMB). This makes it possible for the Motion Tracker object to differentiate between the camera tracks for the solved camera and the Tracks on the moving object (both independent of one another) 选择所有轨道(滚动通过镜头，以确保所有选定)的跟踪对象，并分配给他们的对象跟踪(人民币)。这使得运动跟踪对象有可能区分摄像机的轨迹为解决相机和轨迹对运动的对象(都独立于彼此)
   
6. Optionally, the camera can first be solved ( 可选地，相机可以首先解决(Run 3D Solver 运行3D Solver button in the Motion Tracker Object’s 按钮在运动跟踪对象的Reconstruction 重建 tab). This is not necessarily required for object tracking but should be done in most cases for a complete 3D solve (if only to solve the camera’s focal length, which would otherwise have to be entered manually). Make sure that the 标签)。这对于物体跟踪不一定是必需的，但在大多数情况下对于一个完整的3D 解决(如果只是为了解决相机的焦距，否则将不得不手动输入)应该这样做。确保Lock Solved Data 解锁数据 option in the same tab is enabled so the solve does not get confused when subsequent changes are made to the 选项，这样当随后对Object Tracker 物体跟踪器’s Tracks. 的足迹
   Then the object tracking can be done. You should differentiate between the following 2 cases: 然后就可以进行目标跟踪了，你应该区分以下两种情况:
   
   
   • If you want to run a geometry-supported solve (see 如果您想运行支持几何图形的解法(请参见Geometry Object 几何对象 for details), drag the respective object into the 详细信息) ，将相应的对象拖动到Geometry Object 几何对象 field in the Object Tracker’s 在对象跟踪器的字段Trackers 追踪器 tab. The object must be positioned correctly (with regard to perspective) in front of the object to be tracked. When doing so, the scene has to be viewed through the solved camera (if this does not exist, then through the Viewport camera). 标签。对象必须正确地放置在要跟踪的对象的前面(关于透视)。当这样做时，场景必须通过解决相机(如果这不存在，然后通过视口相机)
     
   • If a solve without geometry (see 如果一个解决没有几何(见Geometry Object 几何对象 for details) is done (for which more Tracks are required), the (详情请参阅)(需要更多轨道) ，则Geometry Object 几何对象 field must be empty. 场地必须是空的
     
7. Click on the 点击Run 3D Solver 运行3D Solver button in the Object Tracker’s 目标跟踪器中的按钮Reconstruction 重建 tab. 标签
   

If the 3D object solve was successful the Object Tracker will have the position and rotation keyframes needed to track the movements of the object to be tracked. 3D objects can now be inserted and made Child objects of the Object Tracker, which will let them move with it accordingly.

如果三维物体解决是成功的，物体跟踪将有位置和旋转关键帧需要跟踪的对象的运动被跟踪。现在可以插入3D 对象，并使其成为物体追踪器的子对象，这将使它们随之移动。

Without geometry-supported solving you will (similar to camera tracking without using a Motion Tracker Tag) have a group of points without any logical scale, position or rotation. It is recommended that the solved points be calibrated using the Motion Tracker Constraint tag (see Geometry Object).

没有几何支持的解决您将(类似于相机跟踪没有使用运动跟踪标签)有一组点没有任何逻辑规模，位置或旋转。建议使用运动跟踪器约束标签(见几何对象)校准已解决的点。

If the 3D solve was unsuccessful it will often be due to poor or too few (minimum: 3 for geometry-supported reconstruction, 7 for a reconstruction without geometry) Tracks. In this case, create additional object Tracks, if possible, or optimize the existing Tracks (see also What are good and bad Tracks?) and will reconstruct them again.

如果3D 解决方案不成功，通常是由于解决方案太差或太少(至少3个用于几何支持的重建，7个用于没有几何支持的重建)。在这种情况下，如果可能的话，创建额外的对象 Tracks，或者优化现有的 Tracks (参见什么是好的和坏的 Tracks?)然后再重建它们。