A basic study on designing 3D Characters for laser-plasma scanning 3D display
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- やすもり かいじ
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1 A basic study on designing 3D Characters for laser-plasma scanning 3D display More and more attentions are paid to the threedimensional (3D) display as our desires to view real 3D images swell, and much research has been done on 3D display. Auto-stereoscopic displays allow us to view 3D images without requiring the viewer to wear special glasses or devices. Recently, a novel 3D display using laser-plasma scanning has been proposed, that can show any 3D contents in free space. In order to extend the potential applicability of the system, this paper presents amethod to produce 3D characters as point-cloud contents with considering the hardware characteristics. Then, I estimate the damage of various built contents on the system and confirm the validity of the proposed method. [1] 3 *2 3D ( 3D ) 3 *1 2 ( 3D ) 3 3D 4 4K 16 () ( ) ( ) 3D HMD(Head- Mounted Display) [2] 3D *2 (Avatar):
2 Figure 1 Parallax barrier method Figure 2 Lenticular method 3D 3D *3 3D 3D 3D 2D Figure 3 Principle of integral photography ( ) [6](Figure3 [](Figure4) [4] 3D () (a) Record (b) Play Figure 4 Principle of holography (Figure1) (Figure2)[5] 3D *3 3D [3] 2D () [8]
3 Figure 5 Free space display of point cloud by laser-plasma 3D 3 [9, 10,11] ( 1kHz ) (3 ) (Figure5) 3 3 Figure 6 f [Hz] t[sec] ft f ,000 t [12,13]100[msec] 100 Figure 6 3D object Pyramid in the air projected by the display 2D 3 3D 3D 1ms
4 Figure 7 Plasma luminous body MEMRECAM GX-1 10,000fps 512x384 fps PC *4 fps Figure 8 Improved Square in the air fps 10,000fps 1 9 fps 3D 1ms Figure 9 Hand-drawn fish(left) and Fish in the air(right) Figure 7 3 x 100, y 100, z 100 (Figure8)[14,15] (Figure9)[16] (Figure10)[17] [18] *4 2G 10,000fps10
5 Figure 10 An example of 3D objects, Iroha and Nihon ( ) Figure 11 A character Higashi and sliced Higashi 2 (Figure11) 4050 *5 3 (Figure12 ) Figure 12 l *5
6 Figure 12 A method for converting a line to asquare Figure 13 A method for combining squares Figure 14 An example of paths of various characters () d (Figure13) 2009 D th L L/ (a+ 1) < D th a Figure14 () E P k c k a s A= n a s n n {P 1,P 2,,P n } E = 1 A n c k c k 1 2 k= 2 z 10 () E E MAX Figure15 E
7 Figure 16 Proportion of E to E MAX in cases of Hiragana Figure 15 Comparison of damages to the system E MAX E ( E ) () (AZaz) E E MAX Figure16,17, (Figure16) f l ( ) 1 Figure 17 Proportion of E to E MAX in cases of Katakana Figure 18 Proportion of E to E MAX in cases of alphabets ( 1 )
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