1. Pencil Drawing Production Cewu Lu, Li Xu, Jiaya Jia Speaker: Ying-Jou Chen

2. Amazi ng DSP

3. Proposed Approach Line Drawing Tone Mapping

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

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

10. Magically….

11. DONE!

12. Tone Mapping Histogram

13. # of pixels pixel value

14. Pencil Tone Natural Tone Histogram Equalization

15. Histogram

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

17. Pencil Tone Natural Tone

18. DONE!

19. Texture Rendering Pencil TextureRock Texture Chinese Drawing Texture

20. Texture Rendering

21. To each pixel, we hope that… Pencil Tone

22. Texture Rendering Smooth

24. Other examples

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