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研究生: 羅鈞謚
Luo, Chun-Yi
論文名稱: 高光消除對於未經相機校準立體影像比對之影響
Effect of Highlight Removal on Stereo Image Matching without Camera Calibration
指導教授: 鄭復華
Cheng, Fu-Hua
口試委員: 陳朝欽
林奕成
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 資訊工程學系
Computer Science
論文出版年: 2011
畢業學年度: 100
語文別: 英文
論文頁數: 50
中文關鍵詞: 高光消除立體影像比對
外文關鍵詞: Highlight removal, Stereo matching, SIFT, Uncalibrated image rectification
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  • 本論文整合了數個獨立並已發展成熟之系統,用以測試高光消除對於立體影像比對是否能有正面之影響。利用一左右成對之立體影像,經過計算後重建影像之深度資訊乃現行以立體影像擷取設備獲得場景景深的主流方法。但在立體影像比對的過程中,我們發現影像之高反光部分可能為降低立體影像比對準確度的一個重要因素。為此我們結合了包括高光消除,未經相機校準之影像矯正,以及立體影像比對等數個已發展成熟的演算法,並將其結合成一套可測試高光消除能否增進立體影像比對準確度之系統。我們將輸入的影像分為兩組,其中一組消去高光元件,一組則維持原樣,並將這兩組測試影像資料分別進行傳統之立體影像比對流程,即經過影像矯正後再予以立體影像比對,最後將兩組經由我們的系統產生之場景深度圖直接進行比較。經由實驗證明,高光消除對於立體影像比對的準確度的確有著顯著的正面支持作用,其影像深度圖正確度之差異無須經由專業之分析即可一眼明辨,一如我們的論點所述。


    1.Abstract 1 2.Introduction 1 3.Previous works 3 4.Methodology 4 4.1 Highlight removal 5 4.1.1 Constant time bilateral filter (CTBF) 5 4.1.2 Highlight removal using CTBF 7 4.2 Uncalibrated image rectification 10 4.2.1 Scale-invariant feature transform(SIFT) 10 a. Scale-space extrema detection 10 b. Keypoint localization 11 c. Orientation assignment 12 d. Keypoint descriptor 13 e. Matching 14 4.2.2 Image rectification without camera parameters 15 4.3 Stereo image matching 16 4.3.1 Feature-based image matching 16 4.3.2 Spatial-based image matching 17 a. SHD method 17 b. NCC method 18 c. SAD and SSD method 19 5. Experimental results 21 6. Conclusion 39 7. Acknowledgement 40 8. References 40

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