Answers.Body: <p>This is due to an issue with resolving an image to a set of pixels called moire.  Basically, due to the regular pattern, some parts of a straight line end up on one line of sensors and the other end up on the other.  This results in a jaggy line and the line moves around as the image moves across the sensor, producing the effect you see.  It can occur when shooting any regular repeating pattern off angle to vertical or horizontal.</p>
  
  <p>The "solution" is to apply a gaussian blur (or moire reduction filter if you have one available, but it will basically do the same thing) to normalize the lines enough that they don't flicker back and forth anymore.  It results in a loss of crispness of the image, but will also deal with making the shifting less pronounced.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-10-26T15:02:01.330Z
Answers.LastActivityDate: 2017-10-26T15:02:01.330Z
Answers.UserDisplayName: AJ Henderson
Body: <p>I came accross footage, which has been shot using a drone. There appears a "swimming" texture effect on a roof of the building. I downloaded an example to youtube to the following link.</p>
  
  <p><div class="youtube-embed"><div>
                  <iframe width="640px" height="395px" src="https://www.youtube.com/embed/-h1riAq4XZ0?start=0"></iframe>
              </div></div></p>
  
  <p>Why is this happening and can it be solved in AE?</p>
  
  <p>Thanks!</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-10-26T10:03:11.970Z
Comments.Text: Moire removal. More about: https://en.wikipedia.org/wiki/Moiré_pattern
Comments.UserDisplayName: bukkojot
Tags: <moire>
Title: "Swimming" texture artefact on a drone video footage
UserDisplayName: user20389
ThreadText: # "Swimming" texture artefact on a drone video footage
  
  (Asked by: username_0 on 2017-10-26)
  
  I came accross footage, which has been shot using a drone. There appears a "swimming" texture effect on a roof of the building. I downloaded an example to youtube to the following link.
  
  Why is this happening and can it be solved in AE?
  
  Thanks!
  
  **Tags:** moire
  
  > **Comments:**
  > **username_1**: Moire removal. More about: https://en.wikipedia.org/wiki/Moiré_pattern  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2017-10-26. Score: 3
  
  This is due to an issue with resolving an image to a set of pixels called moire. Basically, due to the regular pattern, some parts of a straight line end up on one line of sensors and the other end up on the other. This results in a jaggy line and the line moves around as the image moves across the sensor, producing the effect you see. It can occur when shooting any regular repeating pattern off angle to vertical or horizontal.
  
  The "solution" is to apply a gaussian blur (or moire reduction filter if you have one available, but it will basically do the same thing) to normalize the lines enough that they don't flicker back and forth anymore. It results in a loss of crispness of the image, but will also deal with making the shifting less pronounced.
  
  
  ---
  
  