Firstly build a background image in the complex background with a moving object and obtain initial object contour from the current image by frame-difference.

首先利用自适应的背景提取算法从带有运动目标的复杂背景中构建背景图，并提取出运动目标轮廓。

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Background subtraction and frame difference method are commonly used moving objects detection methods.

背景差法和帧间差法都是常用的运动目标检测方法。

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It combines organically the edge detection method and the improved frame difference method to effectively detect the moving and stagnant vehicles simultaneously.

将边缘检测法与改进帧差法进行有机结合，有效地实现了运动和静止车辆的同时检测。

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O'Sullivan made 77 for 7-5, and Hendry's 72 restored the one-frame difference before a tight 14th which eventually fell to O'Sullivan.

BBC: O'Sullivan triumphs in Torquay

The importance of frames (there are several newly framed works here) is especially evident when we see the difference between two monumental Rembrandts the elegant and restrained wooden frame that surrounds the so-called Noble Slav (1632) makes the gilded 19th-century frame on "Aristotle With the Bust of Homer" (1653) seem needlessly gaudy.

WSJ: The Met's European Reunion