虛擬演播室應(yīng)用研究與設(shè)計

電子通信論文編號:TX171 論文字?jǐn)?shù):13704,頁數(shù):20 

目  錄

摘  要 I
ABSTRACT II
緒  論 1
（一）課題研究的背景和意義 1
（二）論文的內(nèi)容 1
一、虛擬演播室的相關(guān)基本介紹 1
（一）虛擬演播室的組成和原理 1
1.虛擬演播室的組成 2
2.虛擬演播室的工作原理 2
（二）虛擬演播室實(shí)現(xiàn)的功能 2
1.實(shí)時三維場景建造 2
2.攝像機(jī)參數(shù)傳感 3
3.虛擬場景控制 3
4.演員與虛擬場景的合成 3
5.無限藍(lán)箱功能 3
6.多機(jī)位虛擬演播 3
7.前景深度鍵 3
8.豐富多彩的大屏幕特技 3
9.雙通道自由切換 3
（三）應(yīng)用實(shí)例 3
二、虛擬演播室的設(shè)計 4
（一）設(shè)計框架 4
1.設(shè)計的原則和理念 4
2.虛擬演播室系統(tǒng)結(jié)構(gòu) 5
3.設(shè)計方案 5
（二）二維與三維虛擬演播室的比較 6
（三）虛擬演播室中應(yīng)該注意的幾個問題 6
1.藍(lán)箱的設(shè)計 6
2.演播室的燈光 7
3.演員的服裝 8
三、虛擬演播室的具體實(shí)現(xiàn) 8
（一）虛擬演播室技術(shù)的概述 8
（二）系統(tǒng)的關(guān)鍵技術(shù)要點(diǎn) 9
1.攝像機(jī)的跟蹤與定位 9
2.攝像機(jī)的鎖定 9
3.變焦、聚焦與景深 9
4.色鍵與藍(lán)箱 10
5.計算機(jī)技術(shù) 10
（三）系統(tǒng)的實(shí)現(xiàn) 10
四、系統(tǒng)的測試和分析 11
（一）測試 11
（二）分析 12
五、總結(jié)和展望 13
（一）總結(jié) 13
（二）展望 13
參考文獻(xiàn) 15
后  記 16

摘  要

數(shù)字技術(shù)的發(fā)展為電視節(jié)目制作領(lǐng)域帶來了巨大的變革。傳統(tǒng)的模擬電視節(jié)目制作設(shè)備在經(jīng)歷了幾代的轉(zhuǎn)變后，已經(jīng)達(dá)到了頂峰，其發(fā)展速度也趨于緩慢。現(xiàn)代計算機(jī)技術(shù)的成熟和數(shù)字電視制作技術(shù)的高速發(fā)展，軟硬件的代價相對降低，帶動了全國各行業(yè)的多媒體制作的數(shù)字化進(jìn)程。多媒體影視教學(xué)的制作，同樣需要跟隨這種形勢發(fā)展。在這種形勢下，虛擬演播室技術(shù)應(yīng)運(yùn)而生。
虛擬演播室系統(tǒng)作為當(dāng)前視頻制作領(lǐng)域的一個研究發(fā)展的熱點(diǎn)，其主要研究內(nèi)容是在藍(lán)箱中拍攝演員的表演，然后通過色鍵將之與計算機(jī)制作的虛擬場景合成。本文的主要講述了虛擬演播的研究與設(shè)計，它具有一些傳統(tǒng)技術(shù)無法達(dá)到的功能和優(yōu)點(diǎn)，可以更為有效的利用資源，節(jié)省大量的制景費(fèi)用及裝、拆布景所耗費(fèi)的時間和人力。這一技術(shù)還使編導(dǎo)、美工人員擺脫了時間、空間及道具制作等方面的限制，充分發(fā)揮其想象力進(jìn)行自由創(chuàng)造。盡管誕生才短短數(shù)年，但其發(fā)展趨勢卻相當(dāng)迅猛，日益成為電視領(lǐng)域中的一個引人注目的焦點(diǎn)。

關(guān)鍵詞：虛擬演播室  計算機(jī)技術(shù)  色鍵  視頻

ABSTRACT

The development of digital technology for the field of television programming has brought enormous change. Traditional analog television program production equipment at the changes experienced after several generations, has reached its peak, which tends to slow the pace of development. Sophisticated of modern computer technology and digital television, high-speed development of production technology, the relatively lower cost of hardware and software to bring the country's various sectors of the digital multimedia production process. Multi-media teaching video production, this situation needs to follow the same development. Under such circumstances, the virtual studio technology came into being.
Virtual studio system as the current field of video production, a research and development of hot spots, the main study are: shooting at blue box in the actor's performances, then through the color key to the production of computer-synthesized virtual scene. This article focuses on the study of virtual design studio, which has a number of traditional technologies can not achieve the features and benefits, can be a more effective use of resources, substantial savings in the cost of the system and installed King, set down by the time and manpower consuming。This technology also enables producers, artists from the time, space and props production constraints, and give full play to their imagination to create freely. Even though a few short years before the birth, but the trend of its development is very rapid, the field of television is increasingly becoming a focus of attention.

Keywords：Virtual Studio Computer Technology Color key video