本論文主要建立一套光學式運動追蹤系統，使用三組線性攝影機與紅外線點光源來進行空間點位置的量測，利用三平面交於一點的幾何關係式求出紅外線點光源的位置。電路方面使用數位訊號處理器控制線性攝影機取像並且將類比資料數位化，同時進行搜尋尖峰值位置的影像處理，然後再使用USB 介面與CPLD 將數位化後的資料匯集起來並且傳送到PC 端做運算處理。機構方面設計了精密的透鏡夾持器供柱狀透鏡的安裝，可調焦式移動機構做焦距的調整，鈑金件的設計則使得整體運動追蹤器的外觀更加地美觀。另外在校正方面根據一般鏡頭的扭曲值補償方法轉換成校正柱狀透鏡扭曲值方法，基於精確度的考量設計了一組X-Y 校正平台來評估此運動追蹤器的量測精度，並使用最佳化方法求出此量測系統的最佳參數以降低系統的誤差量。

　　The major purpose of the thesis is to establish an optical 3D body motion tracker. We can acquire the position of infrared LED by using three linear CCD sensors. The basic concept is that three independent planes intersect at a point. The three linear CCD sensors are controlled by a digital signal processor(DSP). The captured images are sent to the PC by using USB interface and a CPLD chip. On mechanical part, we design a cylindrical lens holder to hold the lenses. It is a movable mechanism that can adjust the focal length between the lens and the CCD. We developed a method to correct the distortion of the cylindrical lens. We　also design a X-Y table to calibrate and measure the precision of this tracker device. In the mean time, an optimization method is employed to
obtain a better dimensional parameter for better precision.

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