Creating Anaglyphs

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• Creating Anaglyphs

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Announcements

• REMINDER - In class exam on Monday, March 2nd
• Closed book/closed notes
• Will cover the introduction and the unit on
  pictures (chapters 1-5)
• Will follow the same general format of the
  quizzes (may even include some of those questions
  a second time)
• Will not ask you to write any significant code
• I will not be here (Dr. Fienup will proctor)

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Announcements

• CHANGE - In lab exam is on Tuesday, March 10th
• Closed book/closed notes
• No access to the internet or your previous
  assignments
• Will ask you to write two or three methods to
  manipulate picture(s)
• I will be here

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Announcements

• CHANGE - Tuesday, March 3rd is now a lab
• Introduction to sound
• Read chapter six prior to lab
• I will not be here
• Dossay will answer your questions in lab

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Announcements

• PA04 is now posted
• Use the graphics commands and pictures to create
  a comic strip
• At least four frames (for which you draw lines to
  separate)
• At least two characters
• At least one character must be changed by you via
  code.
• At least one piece of text
• Due on Tuesday, March 10th (yes, the day of the
  in-lab exam)

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Finishing up ObamifyMe
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Who knows what this is
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That is an old fashioned stereograph

• Two images from slightly different perspectives
• If you can get one eye to see one photo and the
  other eye to see the other photo then you can
  create a 3D effect

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Left Eye
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Right Eye
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But how could we do this at home

• Answer
• Anaglyphs
• Split one photo (normally the left eye) into its
  red channel
• Split the other photo (normally the right eye)
  into its cyan channel
• Merge
• But you need those funny glasses (I have both
  red/cyan and yellow/blue glasses)

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(No Transcript)
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So what would the code look like?

• def anaglyph(left,right)
• output makeEmptyPicture(getWidth(left),getHeig
  ht(left))
• for x in range(1,getWidth(left))
• for y in range(1,getHeight(left))
• target getPixel(output,x,y)
• s1 getPixel(left,x,y)
• s2 getPixel(right,x,y)
• setRed(target,getRed(s1))
• setGreen(target,getGreen(s2))
• setBlue(target,getBlue(s2))
• return output

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Slightly better code

• def anaglyph(left,right)
• output makeEmptyPicture(getWidth(left),getHeig
  ht(left))
• for x in range(1,getWidth(left))
• for y in range(1,getHeight(left))
• target getPixel(output,x,y)
• s1 getPixel(left,x,y)
• s2 getPixel(right,x,y)
• setRed(target,(getRed(s1)getGreen(s1)getBl
  ue(s1))/3)
• setGreen(target,getGreen(s2))
• setBlue(target,getBlue(s2))
• return output

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Sources for images

• Several Websites
• http//www.studio3d.com/pages/anaglyph.html
• http//www.studio3d.com/pages/stereophoto.html
• http//hazyhills.com/mars3d/
• Take them yourself
• Take two photos with one slightly to the right of
  the other