Face detection is the premise of rapid and accurate face recognition, its purpose is detecting the face from a picture background.

人脸检测是快速、准确识别人脸的前提，其目的是将人脸从图像背景中检测出来。

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Could you take a picture of me with the lake in the background?

你能以湖为背景给我照张相吗？

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I scanned left and saw his profile picture, which featured fetchingly dishevelled hair, tanned cheeks and a background of a campus lawn.

我的目光扫到左边，看见了他的照片，他有着迷人的蓬乱头发，晒黑的脸颊，背景是校园的一块草坪。

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's golden arches and the account's background picture to McDonald's new Fish McBites.

NPR: Burger King Apologizes After Twitter Hacking

Beyond the sleek design and processing power, VIZIO continues to leverage its HDTV background with brilliant picture quality, high contrast and wider viewing angles, a staple of the Touch PCs.

ENGADGET: Vizio brings pricing and release information to spring line of laptops and desktops

In February, the Wilkinson Microwave Anisotropy Probe (Wmap) satellite took the most detailed picture yet of the cosmic microwave background - an image of the infant cosmos when it was less than 400, 000 years old.

BBC: NEWS | Science/Nature | Dark energy tops science class