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| 研究生： |
羅煜發 Yu-Fa Lo |
|---|---|
| 論文名稱： |
基於雙邊濾波係數之超音波成像聲速分析 Optmization of ultrasound bemforming sound velocity using coefficients in bilateral filterig |
| 指導教授： |
沈哲州
Che-Chou Shen |
| 口試委員: |
沈哲州
choushen@mail.ntust.edu.tw 黃騰毅 Teng-Yi Huang 陸敬互 Ching-Hu Lu 葉佳倫 Chia-Lun Yeh |
| 學位類別： |
碩士 Master |
| 系所名稱： |
電資學院 - 電機工程系 Department of Electrical Engineering |
| 論文出版年： | 2018 |
| 畢業學年度： | 106 |
| 語文別： | 中文 |
| 論文頁數： | 62 |
| 中文關鍵詞： | 最佳成像聲速估計 、雙邊濾波器 、影像擴散分析 |
| 外文關鍵詞： | Optimal imaging sound velocity estimation, Image diffusion, Bilateral filter |
| 相關次數： | 點閱：114 下載：2 |
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超音波亮度模式(Bmode)成像中，波束成像通常藉由時間延遲的觀念估算物體的位置，並藉由成像後的分析比較來判斷此成像之最佳聲速，由於方法的不同導致其結果並不相同，所以我們將定量分析統一，並且依據不同的方法所畫出來的分析圖判斷方式也由所不同。
在本篇比較影像擴散邊緣銳利與雙通濾波邊緣判斷中，主要檢測方法為根據成像的邊緣銳利度來做最佳聲速的判斷，但在使用兩種方法前，我們也將成像後的純影像來做亮度的分析比較，並分為最亮點的分析與平均亮度分析兩種方法，由於平均亮度分析法的結果，與預期結果有差異所以最終則採納最亮點分析法來做比較，在本邊模擬與實驗中期比較結果大致相同，但在非聚焦區都皆無法準確判斷最佳聲速，估而在結論中會做為討論部分。
In ultrasonic mode (Bmode) imaging, beam imaging usually estimates the position of the object by the concept of time delay, and judges the optimal sound velocity of the image by comparison analysis after imaging. The result is not due to different methods. The same, so we will unify the quantitative analysis, and the method of judging the analysis according to different methods is also different.
In the comparison of image diffusion edge sharpness and double-pass filtering edge judgment, the main detection method is to judge the best sound velocity according to the edge sharpness of imaging, but before using the two methods, we will also image the pure image. To do the analysis and comparison of brightness, and to divide into the two methods of the brightest point analysis and the average brightness analysis. Because the result of the average brightness analysis method is different from the expected result, the brightest point analysis method is finally adopted for comparison. The comparison between the simulation and the experimental mid-term results is roughly the same, but in the non-focus area, the best sound velocity cannot be accurately determined, which is estimated as part of the discussion.
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