优于被动反光标志点一个数量级以上的精度

不受环境光和光线反射影响，稳定性与可靠性更好，更适用于复杂的实验环境和更高的测量精度要求

By default, Vic-3D uses the "Best Plane Fit" to assign a coordinate system.  This option calculates a transform into the best fit plane of the surface.

Sometimes it is preferred to leave the data in camera coordinates.  By deselecting the Auto Plane Fit option, the data will be in camera coordinates.

This is how Vic-3D assigns the camera coordinates system:

• 1. The x-axis is the baseline between the center of the two camera sensors.
• 2. The origin is the center point between the two camera sensors, along that baseline/X-axis. 
• 3. The Z-axis is defined as perpendicular to that X-axis, starting at the origin.
• 4. One more constraint is required to define the Z-axis, or it could just spin around the X-axis at the origin point.  The average plane between the two sensor planes is used to determine that one degree of freedom that is missing to determine the Z-axis (without this constraint, the z-axis would just spin around the x-axis). 
• 5. The Y-axis is normal to X-axis and Z-axis, so that the three axes form a coordinate system with all axes normal to each other. 

您可以通过访问以下链接向我们提交试用授权申请，我们在收到申请信息后将与您联系并为您提供试用软件的下载、安装和试用License申请的支持。

提交试用申请: http://www.acqtec.com/article/ApplyTrial

提交试用申请前，如能完成以下操作可以帮助我们更快的向您交付试用服务：

1. 注册成为网站会员，并发送邮件到info@acqtec.com, 邮件需包含以下信息：

• 您的姓名及单位及联系电话；如果是高校用户，使用edu.cn的邮箱会更快获得批复；
• 您需要试用的模块及最基本的应用方向，以方便我们评估和提供最基本的技术支持；

2. 我们在收到您的邮件后，将在后台审核通过您的会员注册并邮件通知您，然后您可以完成以下操作：

• 通过http://www.acqtec.com/article/Trial下载您需要的试用版本；
• 在您准备试用Vic软件的计算机上安装试用软件并启动，您将看到以下界面，请提取其中的Software key信息并Email给我们；
• 完成以上步骤后，请等候我们发送给您的试用license即可；
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