Based on the traditional difference algorithm, a new background construction and updating method is proposed.

在传统的差分算法基础上，提出了一种新的背景的建立和更新的解决方法。

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Considering the characteristics of infrared image, the frame difference algorithm is simple and easy to be realized by hardware.

传统的帧间差分法算法简单、便于硬件实现，但在信噪比较低时抗噪性能较差。

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Then, the difference algorithm is used to detect the shot-trace, calculate the shape center coordinates and draw the shot-trace.

再利用差分算法检测射弹，计算出形心坐标并绘出射弹运动轨迹。

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Well, that really does not make much of a difference when you expose the entire database table and have way too much faith in the 34 year old encryption algorithm reported to be used to safeguard the data.

FORBES: The Real Lessons Of Gawker's Security Mess