Chroma key

Today's practicality of green-screen compositing is demonstrated by Iman Crosson in a self-produced YouTube video.Top panel: A frame of Crosson in full-motion video as shot in his own living room.Bottom panel: Frame in the final version, in which Crosson, impersonating Barack Obama,

Virtual television studio with green-screen technique.

Girl wearing blue clothing in front of green screen.

Chroma key compositing, or chroma keying, is a special effects / post-production technique for compositing (layering) two images or video streams together based on color hues (chroma range). The technique has been used heavily in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture and videogame industries. A color range in the top layer is made transparent, revealing another image behind. The chroma keying technique is commonly used in video production and post-production. This technique is also referred to as color keying, colour-separation overlay (CSO; primarily by the BBC), or by various terms for specific color-related variants such as green screen, and blue screen – chroma keying can be done with backgrounds of any color that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most distinctly in hue from most human skin colors. No part of the subject being filmed or photographed may duplicate a color used in the background.

单词	Green Screen
释义	Green Screen 原声例句爱豆飙英语 It was really wild to do green screen. 用绿幕还挺疯狂的。爱豆飙英语 There's no CGI, there's no green screen. 没有电脑特技，也没有绿幕。 Scishow 精选系列 Oh, this is gonna be hard with the green screen. 哦，对于绿色屏幕来说可能会有一点难辨识。当月 CNN 10 学生英语 2021年4月合集 But it is not a green screen as someone on Twitter asked yesterday. 但并非昨天观众在推特上提到的绿幕。 The Tonight Show Starring Jimmy Fallon And someone made me a book bag out of the green screen material. 然后有人用绿屏材料给我做了个书包。 The Tonight Show Starring Jimmy Fallon Well, yeah, you know, we have a lot of green screen work in this movie. 呃是的，你知道，这部电影里有很多场景需要绿屏拍摄。 VOA常速英语_娱乐 They all have green screens and light kits and all these things in their homes. 他们家里都有绿色的屏幕和灯罩，还有所有这些东西。华盛顿邮报 Baby Yoda, like, a lot of these things are green screen, but Baby Yoda is there. 很多都是绿幕电影（特效电影），尤达宝宝在电影里。当月 CNN 10 学生英语 2021年8月合集 In the past, movies and TV shows that were set in space relied heavily on green screens and visual effects. 过去，以太空为背景的电影和电视节目严重依赖绿屏和视觉特效。演员对谈（双语精选） By the way, working on green screen, how do you feel about that as you did in the Marvel movies? 顺便问一下，在绿幕上工作，你拍漫威电影的时候是什么感觉？爱豆飙英语 I mean this is insane, did you have to wear like green screen goggles or something to look like this or? 我是说这真的太疯狂了，你是不是得带着像绿幕眼镜或者是和这个相似的东西？ VOA常速英语（视频版）- 2023年合集 It helps them when they're especially on a green screen when there's nothing around to know what the pace of a movie is. 这对他们很有帮助，尤其是当他们在绿屏上、周围没有任何东西可以知道电影的节奏时。 VOA常速英语_美洲 They have a green screen room set up, with hundreds of cameras at different elevations, filming a subject in the center of the room. 他们布置了一个绿幕房间，在不同的高度安装了数百个摄像头，然后在房间的中央拍摄一个主题。透视百科影视类 The memorable moment was done without a green screen. 令人难忘的时刻是在没有绿幕的情况下完成的。荧屏幕后那些事儿 The result was what eventually became the basis of the modern green screen. 结果最终成为现代绿幕的基础。绯闻女孩第3季 Uh, I'm pretty sure that's green screen. 我确定那只是屏幕特效。废材联盟｜ Community I'm pretty sure you rented a green screen. 我敢确定你还借了个绿光屏。 TED演讲（视频版） 2023年8月合集 I got a green screen, I got costumes, I got an external video maker. 我有一个绿屏，我有服装，我有一个外部视频制作器。影视资讯精选 So, naturally, there was a lot of green screen and empty spaces on set, like when Doctor Strange walks through this portal into another dimension. 自然而然，片场会有很多绿屏和空地，拍摄奇异博士穿过这扇门进入另一个维度的时候要用到这些。 GQ — 明星们的代表角色 It wasn't as challenging as one may think, working on a green screen. 在绿屏上工作并不像人们想象的那样具有挑战性。英语百科 Chroma key Chroma key compositing, or chroma keying, is a special effects / post-production technique for compositing (layering) two images or video streams together based on color hues (chroma range). The technique has been used heavily in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture and videogame industries. A color range in the top layer is made transparent, revealing another image behind. The chroma keying technique is commonly used in video production and post-production. This technique is also referred to as color keying, colour-separation overlay (CSO; primarily by the BBC), or by various terms for specific color-related variants such as green screen, and blue screen – chroma keying can be done with backgrounds of any color that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most distinctly in hue from most human skin colors. No part of the subject being filmed or photographed may duplicate a color used in the background.
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Green Screen

Chroma key