Basically, it is the ability to use your camera and lenses to control the relationship between the background and foreground of your pictures.

基本上讲，就是用你的相机和镜头去控制照片中背景和前景关系的能力。

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But because we have been using various sized brushes, the objects in the background and extreme foreground are blurred out-just like the image produced by a camera.

但是因为我们使用了不同大小的画笔，因此背景和极端的前景就都是模糊的——就象相机产生的图像一样。

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Application processes with user-visible or foreground activities are generally given a higher-priority, making camera resource acquisition and use more dependable.

应用程序进程是用户可见或前台活动通常会被给予高优先级，确保相机获取和使用更加可靠。

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With the flash on, the camera automatically merges an image of the subject illuminated with the flash in the foreground with a separate image of the background nightscape, to produce a single, clear night photo.

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In the foreground, sitting on a hill overlooking the scene, is a couple, the man turned to the camera with an angry scowl on his face.

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