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遮挡环境下采用分层局部敏感直方图的实时目标跟踪

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Keywords: 信息处理技术,局部敏感直方图,分层模板,抗遮挡,实时跟踪

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Abstract:

针对局部敏感直方图跟踪算法中缺乏抗遮挡处理机制,在目标被长时间大面积遮挡时易丢失目标的问题,提出了一种基于分层局部敏感直方图特征的实时跟踪算法。该算法将目标模板分为多个顶层区域,分别判断每个顶层区域是否被遮挡,停止被遮挡区域的模板更新。在更新过程中,针对各顶层区域的置信度不同采用不同的更新速度,使环境变化时算法仍保持良好的抗遮挡性能。对视频的测试结果表明:本方法在目标大小为60pixel×60pixel时平均帧速为30帧/s,满足实时性要求。与局部敏感直方图跟踪算法相比,本算法具有更好的抗长时间遮挡和光照变化的性能。

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