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Pencil Drawing Production Cewu Lu, Li Xu , Jiaya Jia

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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Pencil Drawing Production Cewu Lu, Li Xu , Jiaya Jia

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  1. Pencil Drawing ProductionCewu Lu, Li Xu, JiayaJia Speaker: Ying-Jou Chen

  2. Amazing DSP

  3. Proposed Approach • Line Drawing • Tone Mapping

  4. Line Drawing • Idea… contour might be related… Edge? Not enough… Sobel Filter

  5. Line Drawing Not Simply Edges…

  6. Line Drawing- Curve • Idea… direction detection

  7. Line Drawing- Line Crossing • Idea… CONVOLUTION • Effect of extension

  8. Line Drawing

  9. Line Drawing

  10. Magically….

  11. DONE!

  12. Tone Mapping Histogram

  13. Histogram # of pixels pixel value

  14. Natural Tone Pencil Tone Histogram Equalization

  15. Tone Mapping • Model the shape by…. Gaussian Distribution Uniform Distribution Laplacian Distribution

  16. Natural Tone Pencil Tone

  17. DONE! DONE!

  18. Texture Rendering Chinese Drawing Texture Pencil Texture Rock Texture

  19. Texture Rendering

  20. Texture Rendering To each pixel, we hope that… Pencil Tone

  21. Texture Rendering Smooth

  22. Other examples

  23. 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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