Answers.Body: <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>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-06-26T16:39:50.030Z
Answers.LastActivityDate: 2015-06-26T16:39:50.030Z
Answers.UserDisplayName: p2or
Body: <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>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-06-26T15:44:48.323Z
Comments.Text: 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
Comments.UserDisplayName: p2or
Tags: <greenscreen><tracking>
Title: What are these black tapes in green screening?
UserDisplayName: Farzad
ThreadText: # 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  
  
  ---
  
  ## 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).
  
  
  ---
  
  