Computer Caricature Methods

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Computer Caricature Methods

• Ang Lee
• 05/26/2005

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The first Caricature Generation system, 1982

• Caricature Generator by S. Brennan, MIT.
• An interactive system.
• An algorithm is implemented to amplify the nuance
  of a human face in a computer-generated
  caricature

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PICASSO

• Chukyo Univ, Japan
• Template based
• Adjustable exaggeration rate

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Making Caricatures With Morphing Siggraph Sketch
1997

• Ergun Akleman (T AM Univ)
• (Authors Slides for Siggraph Talk)
• Very simple Templates (Ang dont know if it is
  automated or not)
• Artists manually control several essential
  features of face.

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New Interactive 2D Deformation (2000)

• Still Ergun Akleman (T AM Univ)
• (Authors Slides for Proceedings of Visual'2000 )
• Still Artists manually control features.
• Properties of Simplex Deformers
• Line deformer provides translation, rotation and
  equal scaling in each direction.
• Triangle deformer supports translation, rotation,
  general scaling and shear.
• Paper in gzipped ps format

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New Interactive 2D Deformation (Continue)
Results

• Line deformer

Line deformer
Blending two triangle deformers
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Modeling Expressive 3D CaricaturesSiggraph
Sketch 2004

• Still Ergun Akleman and Jon Reisch (T AM Univ)
• (Authors Slides for Siggraph Talk (ppt))
• Description(Sketch (pdf) )

Create abstract caricatures using disconnected
piece
C Maya API
Result
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Expressive Facial Caricature Drawing, 1999

• S. Iwashita, Y. Takeda and T. Onisawa ,

Average Face
Expressionless Facial Caricature
Expressive Facial Caricature
Facial Caricature Drawing Part
Facial Expression Generation Part
Linguistic Terms youthful, eyes very big
Linguistic Terms A laughing face
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Example-based Caricature generation with
exaggeration

• Microsoft research, Asia, 2002

Manually
Drawn by artist
H. Chen etc., Example-based facial sketch
generation with non-parametric sampling, ICCV01
2001
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Example-based Caricature generation with
exaggeration(cont.)

• ASM (Active Shape Model) search
• Results

Original Image
Unexaggerated sketch
Result Exaggerated Caricature
Same exaggeration applied to image
By artist, not used in trainings.
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Automatic caricature genereated by analyzing
facial features ACCV 2004
Exaggeration
A hierarchical structure is used to extract
features and generate a mesh
Image metamorphosis
Final result
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Automatic caricature generated by analyzing
facial features ACCV 2004 (cont.)

• Results