Instructional Sketchbook ISketch Plan III

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Instructional Sketchbook ISketchPlan III

• Author Sunnie Li
• October 19, 2004

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Motivation

• A lot of research have been focused on
  beautification of shapes
• E.g.
• SmoothTeddy
• Image Guided 3D Sketching
• Yet most fine art people still prefer traditional
  pencil-paper tools to practice
• Smoothing lines is not enough
• Shadows are what really matters to make the
  picture look real

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Goal

• Targeted user people with interests in fine
  arts, especially students
• A pen-based sketchbook that guides users to
  shadow/color the picture
• To let people have a better sense when they
  observe the difference between the real objects
  and pictures

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Overall Design

• More about how to teach the user to draw, while
  maintaining a certain degree of automation

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Functionalities

• Scaling
• Users may choose to shut off the option by
  drawing a symbol at the selection circle
• Start shadowing

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Functionalities (contd)
Functionalities (contd)

• Scaling

• Scaling
• Start shadowing
• Division between light and dark
• Blending
• Reflection
• Lighter Shadow
• Darker Shadow
• Darker Area

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Functionalities (contd)

• Shadow instructions are implemented as following
• Capture the image of the actual object/person
  with a digital camera
• Obtain data from the image
• Suggestions/guides

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Tools
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Challenges

• Time delay between consecutive gestures
• Allowance of customized commands
• How to use data from the captured image to
  provide best suggestions
• How to show the user where to shadow with what
  colors (i.e. how dark it should be)
• Gesture latency will increase and more confusions
  from users with growing set of tools