本研究在虛擬環境中發展出一套符合攝影學法則的即時智慧型攝影機模組，當使用者操縱化身時能夠給予攝影機自動規劃之能力，不需要花費額外的心力控制攝影機。智慧型攝影機的能力包含了規劃不被障礙物遮蔽的跟蹤拍攝，以及當攝影機進入險惡的環境時，自動在兩台攝影機之間進行符合攝影學法則的轉切。此外，此智慧型攝影機模組能夠依照不同使用者的偏好，產生不同結果的攝影機規劃。我們實作了此一智慧型攝影機的系統，並以實例說明此系統的有效性。 / We have developed a real-time intelligent camera module with a set of cinematography in a virtual environment. Its automatic camera planning capacity allows that the users to spend less effort in controlling the camera when manipulating an avatar. An intelligent camera should be able to plan unobstractive tracking motion and necessary cuts automatically between two cameras with the rule of cinematography. In addition, the results of the camera planning can be customized by setting appropriate parameters in accordance with the user’s preferences. We have implemented this intelligent camera system, and demonstrated the effectiveness of this system through several examples

在互動敘事(Interactive Storytelling)的應用中，適當的攝影機規劃能幫助我們呈現虛擬世界中所發生的故事。在本研究中，我們設計了一個可以讓使用者設計互動敘事的應用平台－IMStory。針對故事創作，我們提供了一個故事腳本的描述語言及其剖析器，當使用者撰寫好互動故事之後，系統便能夠根據故事情境內容及與使用者互動的結果產生出符合情境的自動攝影機規劃系統。在此系統中，我們建立了一個能夠讓攝影機理解故事腳本的關係模型，建立虛擬攝影機組態與「故事情境」間的對應關係，即時找出更能表達當時情境的拍攝方式與架設位置。最後，我們設計了一個場景劇本進行實驗，在實驗中，我們的系統能夠即時因應場景中角色物件的位置作出即時的攝影機規劃，並且能夠配合互動環境中改變的情境參數而使用適合的攝影模組，產生出符合攝影學法則且賦有敘事能力的鏡頭。透過我們的方法，希望能提供一個更加有敘事能力的互動敘事平台。 / In an 3D interactive storytelling system, virtual camera is the key for us to understand what happens in the virtual world. In this thesis, we have designed an intelligent camera planning system for interactive storytelling, in which story plots are influenced by the user’s actions. Since the story flow cannot be determined in advance, it is essential to utilize real-time camera control to express the story for given spatial relationships between characters and objects. A script language and its parser were designed for our storytelling system (IMStory) to describe events in the story as well as the contexts associated with the events to model the properties of a story for camera control. We have developed a camera planning system by mapping contexts parameters into appropriate camera control parameters. We have implemented the 3D interactive storytelling system and demonstrated its capabilities with several examples. The camera planning system is shown to perform in real time, and the generated shots are more expressive in establishing the relation between camera configurations and story context.

近年來由於電腦軟硬體及人機介面介面技術的發展，互動數位敘事(Interactive Digital Storytelling, IDS)的應用也逐漸被重視，特別是在新型態電腦遊戲的設計，而這個趨勢也為即時虛擬攝影機的規劃帶來新的機會與挑戰。本研究旨在透過互動數位敘事腳本內容的分析，建置客製化攝影機運鏡實驗平台，即時自動產生符合情境情節、人物情緒的拍攝方式，並參考電影拍攝手法，結合攝影學的專業知識加入不同拍攝風格，讓同一段影片可以有不同的風格效果。我們希望能夠讓現有的互動敘事系統The Theater [1]中的運鏡技術有跡可循，不再只是以人工的方式憑藉直覺來設定攝影機的位置，而能使得虛擬攝影機的操控變得簡易，修正拍攝效果時將更加簡便，成功快速掌握運鏡的每一個細節。我們在The Theater的實驗平台之上，讓敘事者可以根據故事情境客製化虛擬攝影機的拍攝手法，並由電腦自動產生合宜的攝影機拍攝位置，快速完成攝影機規劃。我們以實例透過實驗的方式驗證此系統的有效性。 / The recent advances in computing technologies and human-computer interactions have attracted much attention in the development of interactive digital storytelling (IDS), especially in the application of novel computer game design. This trend does not only bring new opportunities but also new technological challenges to virtual camera planning. Our research in this work aims at building an experimental platform for customized virtual camera planning through the analysis of screen play in an in-teractive story. By adopting the domain knowledge of camera controls in existing films, we hope to design a computer-assisted system that allows an author to easily experiment with different styles of virtual cameras in a same story. We proposed to design an experimental platform based on “The Theater” IDS, which currently uses a pre-authored way to specify the camera position. In the proposed system, we allow an author to quickly customize virtual camera taking according to the context of a story fragment and let the computer generate appropriate camera configurations automati-cally. We use an example story to verify the effectiveness of the system through ex-periments.