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研究生:莊子昕
論文名稱:以菲涅耳轉換及相位展開為基礎之數位全像顯微鏡在FPGA上之實現
論文名稱(外文):DHM base on Fresnel transform and phase unwrapping
指導教授:黃文吉黃文吉引用關係
學位類別:碩士
校院名稱:國立臺灣師範大學
系所名稱:資訊工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2011
畢業學年度:100
語文別:中文
論文頁數:68
中文關鍵詞:數位全像顯微鏡系統晶片設計FPGA菲涅耳轉換相位展開法則
相關次數:
  • 被引用被引用:0
  • 點閱點閱:247
  • 評分評分:
  • 下載下載:18
  • 收藏至我的研究室書目清單書目收藏:0
本論文旨在提出一硬體架構可以將數位全像片還原成原始影像相位圖,此硬體架構適用於嵌入式的數位全像顯微鏡(Digital Holographic Microscopy, DHM)系統,能夠加快運算來即時取得正確的還原全像影像。
本硬體架構採用皆以快速傅立葉轉換(FFT)為基礎的菲涅耳轉換搭配相位展開法則演算法來達到全像圖重建的目的。其中快速傅立葉轉換為高複雜度計算,對於一些需要即時顯示還原影像的應用往往會遇到很大的困難,因此本論文使用硬體電路架構來執行相關運算,以克服一般嵌入式系統上運算能力的限制,以縮短相位重建影像運算所需要花費的時間。另外,為克服硬體常見精確度不足問題,本硬體電路中大多使用IEEE 754浮點數格式來提升計算的精確度。
最後我們以現場可程式化邏輯閘陣列(Field Programmable Gate Array ,FPGA)為開發平台實現並實際測量硬體電路的資源消耗以及運算時間;實驗的結果顯示了本論文所提出的相位展開法則硬體架構能夠得到正確的還原結果,並且有效的降低還原相位圖運算所需要花費的時間以及擁有低硬體資源消耗的優點,因此適合使用於嵌入式的DHM 系統。

中文摘要............iii
誌謝............iv
目錄............v
附圖目錄............vii
附表目錄............x
第一章 緒論............1
1.1 研究背景與動機目的............1
1.2 研究方法............4
1.3 全文架構............6
第二章 基礎理論及技術背景介紹............7
2.1 菲涅耳轉換運算流程............7
2.2 相位展開法則概述............11
2.3 討論菲涅耳轉換及相位展開於數位全像顯微鏡之應用............14
2.4 FPGA系統設計............16
第三章 系統架構............19
3.1 菲涅耳轉換及相位展開法則之硬體電路架構............19
3.2 嵌入式記憶體(On-chip RAM)............22
3.3 菲涅耳轉換之轉換前單元(Pre-transform Unit)及轉換後單元(Post-transform Unit)............24
3.4 傅立葉轉換單元(Fourier Transform Unit)及離散餘弦轉換單元(DCT Unit)............35
3.5 相位展開法之轉換前單元(Pre-transform Unit)及轉換後單元(Post-transform Unit)............42
3.6 軟硬體共同設計............48
第四章 實驗數據與效能比較............51
4.1 開發平台與實驗環境介紹............51
4.2 實驗數據的呈現與討論............54
第五章 結論............63
參考著作............64
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