Change detection, mapping parameter estimation, moving objects and background detection are used to implement image motion segmentation.

通过变化检测，映射参数估算，运动区域和背景检测来实现运动分割。

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Objects and background should vary in brightness or saturation, in addition to hue, and color text on color backgrounds should also be avoided when possible.

图形和背景除了色调不同外，饱和度和亮度也应有区别。如果可能，应尽量避免在彩色背景上运用彩色文本。

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In this algorithm, the foreground objects and background are divided and then compressed separately. We only need to compress one or several background of key frames.

该方法先将视频序列分割出前景对象与背景对象，然后分别针对分割出来的前景对象与背景对象进行压缩，而此时背景就可以只压缩一帧或者关键几帧。

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This is a story about mechanical objects, -- some of which move-- -- remember those smiling houses in the background-- and some of which are stationary, but they're all mechanical objects.

这是一个关于会活动的，机械的故事-,还记得那些作为背景微笑的房子吗？,它们不会动但也都是机械的东西。

耶鲁公开课 - 文学理论导论课程节选

Also, in many common situations, such as taking a simple picture of a single face or object, the refocusing ability just doesn't come into play, since it works best when there are multiple objects arranged so that some are in the foreground and some are in the background.

WSJ: Lytro Takes Fresh View on Picture Taking

Using motion-detection algorithms, the BriefCam software separates the background (static or non-moving objects) from the moving objects, tracking and analysing any motion within the frame.

ECONOMIST: Monitor