研究生: |
李崇甫 Chung-Fu Lee |
---|---|
論文名稱: |
基於電視擷取影像之依打者識別好球帶位置之研究 Study on Batter-dependent Strike Zone Identification from TV broadcast Images |
指導教授: |
蘇順豐
Shun-Feng Su |
口試委員: |
王偉彥
none 莊鎮嘉 none 許孟超 none |
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: | 2008 |
畢業學年度: | 97 |
語文別: | 英文 |
論文頁數: | 91 |
中文關鍵詞: | 線性預測 、追蹤技術 |
外文關鍵詞: | linear prediction, tracking |
相關次數: | 點閱:345 下載:2 |
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一場精彩的棒球比賽,除了球員精湛的技術之外,比賽的公平性也是相當重要的一環。往往在比賽中,一個錯誤的判決,將會對整場比賽,甚至整個系列戰造成很大的影響,其中主審裁判在好壞球的判定上,更是佔了比賽中很關鍵的一部分。本論文將提出一種方式,重建棒球的軌跡與不同打者的好球帶範圍,進而判斷投手是否有將球投入好球帶的範圍。在本篇論文當中,我們僅使用電視轉播畫面,並假設攝影機角度不變之情形下,利用移動物體追蹤的技術,如此可以排除一些不必要考慮的像素,節省運算時間,之後再利用路徑預測技術來解決接近本壘板時可能產生的雜訊與誤差的問題,以達到重建棒球軌跡與進壘位置的目的,並使用傳統影像處理所用的色彩學與形態學,來進行打者好球帶的建構,進而判斷出好壞球。本系統的建立有助於訓練裁判在好壞球過於主觀的缺失,並且在重大比賽中輔助裁判做出關鍵性的判決。
Besides players’ wonderful acting, fair judgments for all plays in the field is also a very important essential for a good baseball game. The judgment of a strike or a ball made by the head umpire sometimes may have a great influence on deciding who is the winner or the loser in a game or even a series. In this study, we intend to investigate ways of rebuilding the ball trajectories from television images to decide whether the trajectory passes the strike zone or not. It should be noted that the strike zone will depend upon the batters in the field. Thus, algorithms of detecting whether the pitched ball is a strike are proposed and discussed. In our study, the broadcast television images are used to rebuild the baseball trajectories and to find the position when the baseball passes over the home plate. It is noted that in this study we assume the shooting angle of the camera is fixed but unknown. By considering tracking effects, some unnecessary pixels are abandoned in our algorithm to avoid unnecessary pattern matching and to speed up the recognition process. In our algorithms, noise problems caused by various objects around the home plate are resolved by using linear prediction when the ball approaches to the home plate. Afterward, the strike zone for the current batter is built by using chromatological and morphological techniques. Various experiments are conducted to demonstrate the effectiveness of the proposed algorithms. This system can be employed to help training umpires to avoid making mistakes and can be used to resolve debates in some key situations.
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