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					   Practice

English Theme 45
      Oct 31
                      Iseki
• Information in the light
  – Shape and orientation of an object
• Mental mechanism
  – Fill the gap in the input
• Assumptions
  – Those which can’t be filled
                   Ikeda
• Light
  – Contains much information
• Mental mechanism
  – Necessary to be aware of what is seen
• Assumptions
  – Built-in
  – Learned
              Katsurada
• Visual processes depends on assumptions
  – 5=x+y
  – 3-D geometry
• Mental mechanism for recovery
                 Paragraph1
• Empiricists
  – Mind = blank slate
  – Info = out there in the real world
• Rationalists
  – Mind = includes knowledge of the world
• Both are true
• Visual processes depend on assumptions
             Paragraph1b
• 5=x+y, solve x without knowing y
• Ill-posed problem, but assume y < 1, then
  x>4
              Paragraph2
• Gibson: much info in the light
• Higgins: proof
  – 5 points matching between 2 images
• Horn: analogous proof
  – Shape from intensity
  – Needs smooth, matte surface
              Paragraph3
• Mental mechanisms
  – Necessary to be aware of what is seen
• A traveling robot must process
  – get images → recognize and locate obstacles
• These processes rely on assumptions
                Paragraph4
• Assumptions about the world
  – Built-in (inborn)
  – Learned
• Both play a part in perception

• This chapter: Initial stage of vision
• Next chapter: Perception of depth

				
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posted:9/8/2012
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