PSD Motion Capture Device Professor ： Yih – Ran Sheu Student ： Shih-Ping Chou Student Id ： MA PTT Production Rate ： 100 ％ 1 This paper appears in: Microwave Conference, APMC Asia-Pacific Microwave Conference, APMC Asia-Pacific Issue Date: Dec On page(s): Location: Bangkok E-ISBN: Print ISBN: References Cited: 7 INSPEC Accession Number: Digital Object Identifier: /APMC Date of Current Version: /APMC

Outline Abstract Introduction System Overviews Estimation of 3D marker positions Experimental Results Conclusion 2

Abstract PSD Module Compact 、 Low Cost One-time calibration PSD 、 IR LED 3

Introduction Controlling virtual human motion including joysticks, mice, keyboards and custom console controllers. Capture systems designed for movie production, simpler infrared sensor-based systems. Includes an analog electro-optical sensor and IR LED markers that are placed on the object to be tracked. 4

System Overviews(1/4) 5 PSD Camera Module Active IR LED Markers Operating Procedures

System Overviews(2/4) 6 Fig 1. An active marker 。

System Overviews(3/4) 7 Fig2. PSD motion capture system(1)

System Overviews(4/4) 8 Fig3. PSD motion capture system(2)

3D marker positions(1/4) 9 Fig4.

3D marker positions(2/4) 10 Fig5.

3D marker positions(3/4) 11 Fig6.

3D marker positions(4/4) 12 Fig7. Distance measurement by using the detected intensity

Prototype of the proposed system(1/2) 13 Fig9. Measure from 75cm to 150cm

Prototype of the proposed system(2/2) 14 Fig8. Experimental to evaluate sensor performance

Distance between PSD and marker(1/3) 15 Fig9. Measure from 75cm~150cm

Distance between PSD and marker(2/3) 16 Fig10. Measure from 175cm~225cm

Distance between PSD and marker(3/3) 17 Fig11. Measurement error table

Conclusion Simple, low-cost, high speed motion capture system. PSD sensor module and active markers. Average error less than 30cm. Distance and large angles to be upgraded. 18

References [1] [2] Michiel de Bakker, Piet W. Verbeek, Gijs K. Steenvoorden, and Ian T. Young, "The PSD Transfer Function," IEEE Trans. on Electron Device, 49(1), ,(2002). [3] Dahong Qian, Wanjun Wang, Ilene J. Busch-Vishniac and A. Bruce Buckman, "A Method for Measurement of Multiple Light Spot Positions on One Sensitive Detector (PSD)," IEEE Trans on Instrument and Measurement, 42(1), 14 18,(1993). [4] Chellappan Narayanan, A. Bruce Buckman, and Ilene Busch-Vishniac, "Position Detection of Multiple Light Beams Using Phase Detection,"IEEE Trans on Instrument and Measurement, 43(6), , (1994). [5] J. H. Kim, Y. K. Ryu and H. S. Cho, "Development of real-time motion capture system for 3D on-line games linked with virtual character,"Proc. ofSPIE, Vol. 5603, , (2004). [6] X. H. Ying and Zy Hu, "Distortion correction of fisheye lens using nonparametric imaging model," Proc. Asian Conference on Computer Vision, Jeju, Korea, (2004) [7] E. Schwalbe, "Geometric modeling and calibration of fisheye lens camera systems," Proc. ISPRS, (2005). 19

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