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研究生(外文):Tian-Gen Lin
論文名稱(外文):A Control Interface and Imaging Hardware for Eyeball Features Measurement System
指導教授(外文):Chern-Sheng Lin
外文關鍵詞:iris image acquisition systemeye tracking systemlight field controlpattern recognition techniquesHMI
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其一,提出雙PC 平行處理HMI之眼控系統,主要為開發利用眼控系統來操控一般個人電腦的人機界面,我們稱此架構為主從架構,眼控系統亦即主控端(master system)與個人電腦亦即受控端(slave system),其主控端透過RS-232串列埠與受控端進行連線。本研究乃針對前期的研發成果(改良型紅外線之眼控系統)[1],繼續在硬體架構及軟體設計上做改進,使得系統整體之準確率與穩定度都獲得提升。讓一般人或肢障的病患只要利用視線的移動,便可以“更直接”的方式控制滑鼠游標。
其二,本實驗室同時也發展虹膜檢測系統,市面上已經有這類眼球影像擷取裝置,但因為光源設置問題,當擷取眼球影像時,光源會以鏡反射的方式,光源之光線會直接以鏡反射的方式,直接反射到攝影機的感測晶片裡,呈現一個高亮度的反光點,反光點將使眼球影像的細部結構造成遮蔽,減低眼球所能量測的區域,因此我們使用兩顆白光LED安置於CCD攝影機之鏡頭的上、下兩方,配合本研究使用Borland C++ Builder 6.0開發的取像與打光控制程式,利用RS-232串列埠傳送打光訊號至89C51單晶片光源控制電路,使得兩顆白光LED在不同的預定時間內,產生瞬間的閃光,經CCD攝影機分別在兩個閃光瞬間擷取影像後,使用線性插值的方式將兩張影像合併,完成一個無反光點的影像,完成一套雙脈衝光之虹膜取像與光源控制系統。
The thesis is aimed at the Eyeball Features Measurement System(EFMS) and proposed a new design theory. There are two kinds of EFMS will proposed in this paper.
In the first part, dual PC HMI on parallel processing for eye tracking system was proposed . It mainly develop a HMI of using the eye tracking system to control a PC, is called master-slave system, the eye tracking system is the master system and a PC is the slave system. The master system is connected with slave system by RS-232 serial port. The system mainly improve the hardware and software of the past generation of eye tracking system [1] to perform more accuracy and more stability. Therefore, disable person can use a computer more directly with their eyes movement.
In the second part, a new image processing and light field control method for evaluating pupillary pattern is described. This system is based on an pupil measuring system, using double pulses control and pattern recognition techniques with appropriate hardware and software. The light from the scene of the eye passes through the CCD camera and is collected by a condenser lens and directed toward the surface of a photodetector. The optical axis of the CCD camera is not perpendicular to the eye view. In this measuring system, the VCR and display provides video signals to an observer. At the same time, the pupil image video signals are transmitted to the computer to calculate the four partial pupil areas and transfer the whole image of the pupil.
感謝 i
中文摘要 ii
Abstract iii
目 錄 iv
圖 目 錄 v
表 目 錄 viii
第一章 緒論 1
1.1研究背景與動機 1
1.2 研究目的及其重要性 1
1.3文獻回顧 2
第二章 照明光源對人眼之傷害評估 7
2.1 紅外線LED對人眼傷害 7
第三章 雙PC HMI之眼控系統 13
3.1 研究理論與方法 14
3.2 系統架構 28
3.3 主控端與受控端之程式 32
3.4 系統操作流程 36
第四章 雙脈衝光之虹膜取像及光源控制系統 43
4.1 研究理論與方法 45
4.2 系統架構 55
第五章 實驗結果與討論 64
5.1 眼球軌跡之景觀分析 64
5.2 視覺追蹤實驗 66
第六章 結論與未來展望 75
6.1 結論 75
6.2 未來展望 76
參考文獻 78
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