<p>I assume these are <em>home made motion markers</em> in order to track the motion of the head in the shot. This is useful for adding other objects (or images) to the object, therefore the technique is called <strong>object tracking</strong>. </p>

<p><strong>Note:</strong> The example given is only useful for 2d tracking, because most 3d solvers needs a minumium of 8 tracking markers around the object (in each frame).</p>

CC BY-SA 3.0
2015-06-26T16:39:50.030Z
2015-06-26T16:39:50.030Z
p2or
<p><img src="https://i.sstatic.net/8HQKI.png" alt="enter image description here"></p>

<p>In some 'making of' green screening videos, I saw these black tapes on the actors. What are these for? </p>

CC BY-SA 3.0
2015-06-26T15:44:48.323Z
related: http://video.stackexchange.com/questions/5541/what-kind-of-camera-do-i-need-to-record-a-moving-object-in-order-to-do-motion-tr
p2or
<greenscreen><tracking>
What are these black tapes in green screening?
Farzad
# What are these black tapes in green screening?

(Asked by: username_0 on 2015-06-26)

![enter image description here](https://i.sstatic.net/8HQKI.png)

In some 'making of' green screening videos, I saw these black tapes on the actors. What are these for?

**Tags:** greenscreen, tracking

> **Comments:**
> **username_1**: related: http://video.stackexchange.com/questions/5541/what-kind-of-camera-do-i-need-to-record-a-moving-object-in-order-to-do-motion-tr  

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## 1 answers

### Answer by username_1 on 2015-06-26. Score: 5 | Accepted answer

I assume these are *home made motion markers* in order to track the motion of the head in the shot. This is useful for adding other objects (or images) to the object, therefore the technique is called **object tracking**.

**Note:** The example given is only useful for 2d tracking, because most 3d solvers needs a minumium of 8 tracking markers around the object (in each frame).


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