blue screen
(亦作 green screen)
noun
often as modifier
- (in film and video techniques such as chromakey) a blue (or green) background in front of which moving subjects are filmed and which allows a separately filmed background to be added to the final image蓝屏（影视制作中使用的一种技巧：在蓝色的背景前拍摄正在移动的物体, 这样可以让另外拍摄的背景叠加到最后的图像中去）：
a blue-screen effect.
蓝屏叠加效果。