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Pencil Drawing Production Cewu Lu, Li Xu , Jiaya Jia. Speaker: Ying- Jou Chen. Amazing DSP. Proposed Approach. Line Drawing Tone Mapping. Line Drawing. Idea… contour might be related…. Edge?. Not enough…. Sobel Filter. Line Drawing. Not Simply Edges…. Line Drawing- Curve.

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Presentation Transcript
proposed approach
Proposed Approach
  • Line Drawing
  • Tone Mapping
line drawing
Line Drawing
  • Idea… contour might be related…

Edge?

Not enough…

Sobel Filter

line drawing1
Line Drawing

Not Simply Edges…

line drawing curve
Line Drawing- Curve
  • Idea… direction detection
line drawing line crossing
Line Drawing- Line Crossing
  • Idea… CONVOLUTION
  • Effect of extension
tone mapping
Tone Mapping

Histogram

slide13

Histogram

# of pixels

pixel value

slide14

Natural Tone

Pencil Tone

Histogram Equalization

tone mapping1
Tone Mapping
  • Model the shape by….

Gaussian Distribution

Uniform Distribution

Laplacian Distribution

slide16

Natural Tone

Pencil Tone

slide17

DONE!

DONE!

texture rendering
Texture Rendering

Chinese Drawing

Texture

Pencil Texture

Rock Texture

texture rendering2
Texture Rendering

To each pixel, we hope that…

Pencil Tone

reference
Reference
  • "Combining Sketch and Tone for Pencil Drawing Production", Cewu Lu, Li Xu, JiayaJia, International Symposium on Non-Photorealistic Animation and Rendering (NPAR 2012), June, 2012
  • ADMM optimization
  • YUV RGB transformation http://zh.wikipedia.org/wiki/YUV
  • Author’swebsite http://appsrv.cse.cuhk.edu.hk/~xuli
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