| 研究生: |
劉于綸 Yu-Lun Liu |
|---|---|
| 論文名稱: |
細胞顯微影像分割與運動分析 Microscopic cell image segmentation and motion analysis |
| 指導教授: |
曾清秀
Ching-Shiow Tseng |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 畢業學年度: | 92 |
| 語文別: | 中文 |
| 論文頁數: | 66 |
| 中文關鍵詞: | 細胞運動分析 、細胞影像分割 |
| 外文關鍵詞: | cell image segmentation, cell motion analysis |
| 相關次數: | 點閱:16 下載:0 |
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本研究希望能將培養中的細胞連續取像一段時間,再利用機器視覺及影像處理的技術將細胞由影像中分割出來,以進行微觀的活細胞長期行為觀察,希望能進一步了解細胞行,提供未來研究各種培養因子(如:成長因子的濃度、流速、各種外力與刺激)對細胞行為的影響,進而知道如何讓細胞在支架上大量培養,以協助組織工程的研究。
首先,將細胞影像經由變異數運算,利用細胞本身與背景的亮度差異大,變異數值也會比較大的特徵,強化細胞邊緣影像,再以自動閥值選取演算法所求得適當的閥值作二值化運算,接著利用形態學運算中的侵蝕、膨脹作去雜訊之動作,最後再以鏈碼運算作邊界描繪,以描繪出細胞分割所需之初始輪廓。接下來將所描繪出的初始輪廓與原始影像作二值化所得影像作比對,將不必要的背景區域去除,以減少運算量,最後,利用邊界描繪及去除雜訊動作完成初步影像分割。對於特殊的細胞影像如細胞影像灰階不均勻、細胞相黏難以分割等,則分別一一以特殊的方法解將細胞正確分割出。
繼之,將所分割完成的細胞影像,以形心法求得細胞的形心,再利用細胞影像序列中細胞形心的位置及前後兩張影像各細胞封閉區域重疊面積的多寡,來判斷細胞的位移向量,以達成細胞的運動分析。
將所得之連續影像序列運動分析結果與利用人工框選影像序列中細胞邊界求其形心運動路徑結果比較,兩者之間誤差約0~3 。
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