標題: 生成『Spot the Difference』遊戲影片
Generating videos of Spot-the-Difference games
作者: 馮嘯慈
Feng, Hsiao-Tzu
林文杰
Lin, Wen-Chieh
多媒體工程研究所
關鍵字: 大家來找碴;影片視覺顯著區域;Spot the difference;Video saliency
公開日期: 2012
摘要: 「Spot the difference」遊戲影片為「Spot the difference」遊戲(俗稱大家來找碴)的一種版本,遊戲者從兩段近乎相同的影片中,找出運動的物體不同的變化。本論文提出一個產生「Spot the difference」遊戲影片的方法,遊戲製作人只需提供一段固定視角的影片作為輸入,我們的系統即可產生不同難度的遊戲影片。類型遊戲由於屬於影片編輯,不像一般靜態圖片在徒手繪製或編輯上都較為容易,故在設計上較為困難並難以大量生產,所以至目前為止尚未有人制定出一個有效的方法應用在此遊戲影片的製作上。 因此本論文利用「運動誘導視盲」概念,結合目前廣泛應用的影片視覺顯著區域表示圖分析輸入影片,並且對於運動中的物體其視覺顯著程度制定了「運動片段之視覺注意程度」和「運動片段之易發視覺意識注意程度」,基於這兩種定義,我們可以決定出哪一個運動片段適合當成相異物以及各個運動片段與相異物的進場時間點該如何搭配進而控制遊戲的難易度,且在最後利用眼動儀實驗驗證了在制定遊戲影片時的各項因素必要性,以及透過使用者進行遊戲時的反應時間證明容易度越難的遊戲,遊戲完成所花的時間越久。
Spot-the-Difference is a game, in which players need to find the differences between a pair of similar images. The two images look almost the same at first glance but actually have some differences if one carefully observes them. Besides static images, Spot-the-Difference (STD) games can also be played on a pair of similar videos. We call this type of games dynamic STD games. Compared to static STD games, it is more difficult to design and make videos for dynamic STD games because they involve video editing. Hence, to the best of our knowledge, there have not been effective and systematical approaches for making videos for dynamic STD games. In this thesis, we propose an approach that can generate videos for dynamic STD games at different levels of difficulties based on an input video recorded at a fixed camera view. According to the motion-Induced blindness theory, we define the attention level (ATL) and the awareness level (AWL) of motion segments by computing the video saliency map from the input video. Based on ATL and AWL, we can control the level of difficulty by choosing and moving appropriate motion segments as the differences for players to spot. In our experiments, we used an eye tracker to verify the necessity of each factor considered in our definition of ATL and AWL. We also conducted user studies to validate our results, which show that players do need more time to complete a STD game of greater difficulty.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT079957549
http://hdl.handle.net/11536/71847
顯示於類別:畢業論文