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研究生: 李杰
Jie Li
論文名稱: 非接觸式心率量測系統之設計與開發
Design and development of a non-contact pulse rate measurement system
指導教授: 林淵翔
Yuan-Hsiang Lin
口試委員: 吳晉賢
Chin-Hsien Wu
陳維美
Wei-Mei Chen
沈中安
Chung-An Shen
學位類別: 碩士
Master
系所名稱: 電資學院 - 電子工程系
Department of Electronic and Computer Engineering
論文出版年: 2018
畢業學年度: 106
語文別: 中文
論文頁數: 58
中文關鍵詞: GPUrPPG生理訊號影像追蹤數位訊號處理
外文關鍵詞: graphics processing unit, remote photoplethysmography, physiological signals, object Tracking, digital signal processing
相關次數: 點閱:309下載:12
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現今穿戴式裝置蓬勃發展,已經是在運動中量測心率的主流。然而穿戴式裝置本身存在著一些會令使用者感覺不適的問題,例如運動後排汗造成接觸裝置的皮膚產生過敏現象或是身體被束縛等身體不適感。因此,為了解決穿戴式裝置所面臨的問題,近年來有了許多非接觸式的心率量測研究。現今相關的非接觸式心率量測研究大多都是建構在個人電腦上,本論文將非接觸式心率量測系統成功實現在由ARM與GPU所組成的嵌入式系統平台上,並且可以提供日間的運動量測與夜間的健康照護兩種量測方式。本論文結合光流法、色度演算與適應性濾波等方法來提高準確度。日間運動方面,平均絕對誤差為5.48 bpm(beat per minute),標準差為6.66 bpm。夜間量測方面,平均絕對誤差為1.94 bpm,標準差為2.37 bpm。此外,本系統的畫面更新率為60 FPS(Frame per second),並且經過實驗發現在60 FPS下平均絕對誤差為5.52 bpm,而30 FPS下平均絕對誤差則高達26.81 bpm,由此得出,60 FPS有著比30 FPS更高的準確度。經由12名受測者的實驗後可以證實本論文所提出的方法具有不低於現今非接觸式心率量測相關研究的準確度。


Nowadays, wearable devices are thriving and are the mainstream of heart rate measurement. However, the wearable device itself has some problems that may cause discomfort to the user. For example, sweaty skin that contact with the device may cause allergies, or physical discomfort such as the body being bound. Therefore, in order to solve the problems above, there have been a lot of researches in non-contact heart rate measurement in recent years. Most of the studies are PC-based. In this paper, we successfully implement the non-contact heart rate measurement system on an embedded system platform consisting of ARM and GPU. This system provides daytime exercise monitoring and nighttime health monitoring. We use optical flow, CHROM, and adaptive filter to improve the accuracy. In daytime exercise the mean absolute error is 5.48 bpm (beats per minute) and standard deviation is 6.66 bpm. In nighttime measurement, the mean absolute error is 1.94 bpm and the standard deviation is 2.37bpm. Besides, the frame rate of our system is 60 FPS(Frames per second). The mean absolute error of 60 FPS is 5.52 bpm, and the mean absolute error of 30 FPS is 26.81 bpm, which concluded that the accuracy is higher when the frame is 60 FPS. Experiments by 12 subjects confirm that the proposed method has higher accuracy than the current studies on non-contact heart rate measurement.

摘要 I Abstract II 誌謝 III 目錄 IV 圖目錄 VI 表目錄 VIII 第一章、 緒論 1 1.1 研究動機 1 1.2 文獻探討 2 1.3 研究目的 5 1.4 論文架構 7 第二章、 研究背景 8 2.1 光體積變化描記圖 8 2.2 影像物件追蹤 9 2.2.1 膚色辨識 9 2.2.2 影像物件辨識 9 2.2.3 光流法 10 第三章、 系統設計與方法 12 3.1 系統架構 12 3.2 系統介面 13 3.3 多執行緒設計 14 3.4 GPU端系統設計 16 3.4.1 Face detection and optical flow 16 3.5 CPU端系統設計 20 3.5.1 Data processing 20 3.5.2 PPG detection 24 3.6 實驗設計 30 3.6.1 參考裝置 30 3.6.2 實驗流程 31 3.6.3 實驗驗證 34 第四章、 實驗結果與討論 36 4.1 實驗一 36 4.2 實驗二 37 4.3 實驗三 38 4.4 實驗四 39 4.5 與文獻的比較 40 4.6 結果討論 41 4.6.1 亮度影響 41 4.6.2 畫面更新率影響 42 第五章、 結論與未來展望 44 第六章、 參考文獻 45

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