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本视频教程是由Digital-Tutors机构出品的AE键控蓝绿抠像视频教程，Digital-Tutors Multi-part Greenscreen Keying in After Effects，时长：1小时1分，大小：200 MB，格式：MP4高清视频，附工程源文件，教程使用软件：After Effects CS5，作者：Chris Glick，共10个章节，语言：英语。
Digital-Tutors Multi-part Greenscreen Keying in After Effects
In this After Effects tutorial we will learn how to key a greenscreen using multiple layers to capture as much detail as possible. Using multiple layers and keyers, we will be able to focus our efforts and create a better final matte. We will begin the tutorial by importing our footage into After Effects and analyzing the job ahead of us. Then we will create garbage masks to break apart our person into manageable pieces. We will then add Keylight effects to our layers to create an initial key. After that, we will analyze the best way to remove noise on each layer. Then we will fill in our alpha by creating a core matte. Finally we will focus on the hair and all the detailed roto and keying work involved. We will complete the project by doing some heavy-duty rotoscoping work on the bottle.
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