Mask Constraint

掩码约束

Mask Constraint

掩码约束

If you want to solve footage that contains unwanted movement (e.g., a ball that rolls from left to right through the scene or undulating water, etc.), an animated mask can be used to define regions of the scene that should be excluded from tracking. Tracks that are excluded by the mask will be hidden or ignored. The Tracks will not be deleted. As soon as the mask is deleted, the Tracks will again be visible. The Objekt Tracker can be used in conjunction with the mask for the object to be tracked.

如果你想解决包含不想要的运动的画面(例如，一个球从左到右在场景中滚动或波动的水，等等) ，一个动画蒙版可以用来定义场景中应该被排除在跟踪之外的区域。被掩码排除的音轨将被隐藏或忽略。轨道将不会被删除。一旦面具被删除，轨道将再次可见。Objekt 跟踪器可以和掩码一起使用，以便跟踪目标。

A mask can be created either prior to 2D tracking or afterwards (but prior to solving).

蒙版可以在2D 跟踪之前或之后创建(但在解决之前)。

If multiple masks are created whose surfaces intersect and lie in opposing positions (one masks on the inner and one on the outer region), the mask that lies the farthest to the right in the Object Manager will be given priority.

如果创建了多个面具，它们的表面相交并且位于相反的位置(一个面具位于内部，一个位于外部区域) ，则在对象管理器中位置最靠右的面具将获得优先权。

Masks with holes can also be created: For example, with the first tag that masks the outer surface and a second tag that lies within the first tag and masks Tracks that lie within it.

还可以创建带孔的掩码: 例如，第一个标签用于掩码外表面，第二个标签位于第一个标签内，掩码内部有 Tracks。

How can masks be created and edited interactively?

如何以交互方式创建和编辑面具？

Create Mask

创建面具

This activates the Create Mask tool, after which you can click in the Viewport to create the mask’s corner points. Click the last point on the start point to close the mask and create the Mask Constraint tag.

这将激活创建蒙版工具，之后你可以点击 Viewport 来创建蒙版的角点。单击起始点上的最后一个点，关闭蒙版并创建蒙版约束标记。

Or:

或者:

Create a Mask Constraint tag. A rectangular mask will be created.

创建一个掩码约束标记。将创建一个矩形掩码。

If the tag is selected, the following will apply: If a mask has been created, its end points can be selected (the Shift and Cmd/Ctrl keys (as well as the respective commands from the main Selection menu) can be used to add or remove selections) and moved.

如果选择了标记，将应用以下命令: 如果创建了掩码，则可以选择其结束点(可以使用 Shift 和 Cmd/Ctrl 键(以及主选择菜单中的相应命令)来添加或删除选择)并移动。

Multiple selection of mask points is possible.

多种选择的掩码点是可能的。

If nothing is selected, points can be simply grabbed and moved individually. If you Cmd/Ctrl+click on the edge of a mask or if you right-click on it and select Split Mask Edge Here), an additional point will be added at this location. Selected points can be deleted by pressing Del or right-clicking on it and selecting the Delete Selected Mask Vertices from the context menu that appears. If mask points are modified at a specific time in the animation, (linear) keyframes will be added automatically to animate the mask.

如果没有选择任何内容，点可以简单地单独获取和移动。如果你使用 Cmd/Ctrl + 点击蒙版边缘，或者右键点击蒙版边缘，选择分割蒙版边缘这里) ，在这个位置会添加一个额外的点。选中的点可以通过按下 Del 或右键单击它并从出现的上下文菜单中选择 Delete Selected Mask Vertices 来删除。如果掩码点在动画中的特定时间被修改，(线性)关键帧将被自动添加到掩码动画中。

When creating animated masks you should initially create as few edge points as possible. Position the mask roughly in the Viewport with 3-4 corner points and animate it. If more points are required, these can be added as needed. This is much easier than, for example, creating 2 dozen points from the start and animating them!

当创建动画蒙版时，最初应该创建尽可能少的边缘点。定位面具大致在 Viewport 与3-4角点和动画它。如果需要更多的点，可以根据需要添加。这比从一开始就创建2打点并赋予它们生命要容易得多！

Mask keyframes can be moved or deleted in the Timeline (contrary to all other Motion Tracker elements).

遮罩关键帧可以在时间轴中移动或删除(与所有其他运动跟踪器元素相反)。