#devsumi 12-A-3 Physicalization of Computer Graphics
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デブサミで使った講演資料です． 動画が埋め込めなかったので，そこは全部外部リンクにしてあります．
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#devsumi 12-A-3 Physicalization of Computer Graphics
- 1. Physicalization of Computer Graphics 東京大学 落合陽一 (@ochyai / Yoichi Ochiai:facebook) 感想は#devsumiかFBでつぶやいてください, よろしくです．
- 3. 落合陽一 ↘ ↙ + ‒ 宿命 ☞ 命名されたときから電気が好きです
- 16. P2D display resent texture t u r e T e x display D2.5D r m a t i o n e f o display 3D 3D display Manipulation Physicalization of Computer Graphics 東京大学 落合陽一 (@ochyai / Yoichi Ochiai)
- 17. 今のディスプレイは色を変えられる。それから先、何を変えてゆくだろう？ P2D display resent texture t u r e T e x display D2.5D r m a t i o n e f o display 3D 3D display Manipulation
- 18. T e x display texture t u r e 2.5D display 3D display http://www.youtube.com/watch?v=tvxJs_4m0ZE
- 19. D e f o rdisplayo n 2.5D m a t i 3D display http://www.youtube.com/watch?v=Blj4pVsjHwo&t=1m43s
- 20. 3D M a3D p u l a t i o n n i display http://www.youtube.com/watch?v=odJxJRAxdFU&t=1m40s
- 21. 2 A U = g(x, y) 2 ρ0 c 2 z ⎫ ⎧ 2 ⎨−B + (B + 1− γ )cos (2π ) ⎬ λ ⎭ ⎩ 空間ポテンシャルのコントロールによって物体を駆動する
- 26. ２０世紀 映像を作り出した。
- 29. Texture 2D display texture display 2.5D display 3D display Computational Potential Field: Capillary waves
- 31. M. Hullin et al. / State of the Art in Computational Fabrication and Display of Material Appearance には，シーンを ーン中の光線は， ５個のパラメー すれば，図 1(b) ) で記述できる． め，本研究では， シーンを中心と 面上の１点と交 とする．ここで， R はこの平面上 ４次元の光線空 Figure 3: A taxonomy of visual appearance representations, extended from [Fuchs 2008], [Lensch 2003], and [Rusinkiewicz and (u , v) Marschner 2000]: methods for fabrication of material appearance and its interactive display are tightly related to methods for (θ , φ ) ( x, y , z ) describing material appearance in computer graphics contexts, and follow the same patterns. Simplifying the material types to ( s, t ) reduce the parameter space (blue) maintains full interactivity with viewer and light, while restricting the interactions between viewer, material, and illumination maintains a full material gamut (yellow). For reference, illumination-invariant representations (a) (b) are in white. v v C R = (u R , vR ) C R = (u R , vR ) u u DR = (θ R , φR ) DR = (θ R , φR ) C L = (u L , vL ) DL = (θ L , φL ) v u dimensions. Color adds an additional dimension if treated ( x, y , z) as( xay,separable effect in individual, z ) color channels, as is the case with (c) current fabrication techniques.(d) Adding control over light field [Levoy and Hanrahan 1996] to a 4D outgoing light field). BSSRDF and reflectance field differ only in that the BSSRDF is defined relative to a scene surface, while the
- 34. eye light source perspective o1 na r r ow i1 o2 o2 o1 o1 i2 wide o2 point image Co ntrol th e di s t r i but i on o f ω o - > Co n t ro l V iew an g le
- 36. SIGGRAPH 2013
- 37. = projector as light source light source = projector image source texture texture + reflection our approach decompose the components reflection of light source BRDF reflection of surface texture swich these states in time division screen image θ reflection of light source diffuse x% surface texture in real world mirror y% 反射質感は反射状態の時間変調で見せることが出来る．
- 39. 39
- 40. 2D display texture display D e f o rdisplayo n 2.5D m a t i 3D display Computational Potential Field: Acoustic Pressure
- 41. M eth od s: tw o pr inc iple ( Di f f u s i o n a n d De f o r ma t i on ) (a) (b) Mirror Weak diffuse (c) Strong diffuse + deformation Image reflection Image projection Vibration View angle Colloidal screen No ultrasound Weak ultrasond Reflection control Deformation Strong ultrasund
- 42. D if fu s ion De fo rm a t i on http://www.youtube.com/watch?v=IOqp3LQNMvEt=0m54s
- 44. A p pl ic ation: P opping I m a g e E ffe c t Splashed wate Normal image W t = 0.0s Splashed water Normal image t = 0.0s Splashed water Splashed wat Warped image t = 0.2s Splashed water http://www.youtube.com/watch?v=IOqp3LQNMvEt=0m54s When the ultrasonic focal points hits the membrane, image on the bubble screen is warped and membrane splashes the water. After that, bubble screen pops in 0.3-2 seconds. Normal image t = 0.0s Warped image t = 0.2s Popped image t = 0.5s
- 45. 3D display 2.5D display M a3D p u l a t i o n n i display
- 47. Transducer Phased Array D R Focal Point Phased Array wD Phased Array R Focal Point λ Standing waves Object D w
- 48. in 1967, at MIT in 2013, at 東大 コンピュータに描くと コンピュータに描く 実物体が飛んで動く
- 49. コンピュータグラフィクスの原理を実現していく Malleability of Computer Graphics
- 52. “looking-glass time” Yoichi Ochiai, Fuchu Art Museum,2012
- 55. P2D display resent texture t u r e T e x display D2.5D r m a t i o n e f o display 3D 3D display Manipulation Physicalization of Computer Graphics 東京大学 落合陽一 (@ochyai / Yoichi Ochiai)