Each virtual - loop ' s output signals mainly derive from the pixel difference between consecutive image frames within the virtual - loop area . when the result of consecutive frame difference is smaller than the threshold , current frame subtracts the background to produce the virtual - loop ' s signals 各个虚拟线圈的输出信号主要来源于帧间差分，当帧间差分的结果小于判断阈值时，系统会自动调用减背景图像处理方法来产生虚拟线圈信号。
The block matching algorithm ( bma ) is used as a motion estimation method for most of the video coding systems . its goal is to find a block that is most similar to a current block within a pre - defined search area in a reference frame 视频序列图像在时间和空间上有很强的相关性，两帧之间，只有少数部分有大的运动，而且有相当一部分是没有运动的，如固定背景，利用块运动估计和运动补偿技术可以有效地去除图像帧间冗余，实现高效压缩比。
Then the processing methods of inter - frame information in video are presented in detail . the paper discusses video processing technical based on difference . after processing of morphologic operations : image eroding and dilating , we get the binary image to every difference image of video 为了确定图象中人脸的位置，本文引入帧间信息处理技术，采用差分分析方法并利用预处理后差分图象的统计特征，提出一种基于二阶微商算子的人脸定位方法。
The necessity and possibility to estimate and compensate camera rotation in the long focus imaging system is proposed according to characteristics of airborne imaging system . and choosing some points that have great gray levels as image characteristic to estimate motion is also given 针对机载成像的特点，提出了长焦距摄像系统检测和补偿旋转运动的必要与可能性以及利用选择特征图像中的最大灰度值点，作为图像特征来估计图像序列帧间运动的方法。
In the tracking module , a " relation matrix " was built to realize multiple objects recognition , and the parameters of objects could he predicted by using kalman filter for tracking , and then , locus could he obtained even when a dynamic occlusion occurred between two or more objects 在跟踪模块中，提出建立帧间目标“关系矩阵”实现多个运动目标匹配，并采用卡尔曼滤波器预测目标参数，在运动目标相互遮档的情况下，根据预测参数跟踪目标，获得目标轨迹。
