摘要
针对原始码本算法,提出该算法在亮度范围定义方面存在的问题,并给出相应的改进策略.以原始码本算法的约束条件为前提对该算法进行研究,发现在码字匹配过程中,随着像素值逐渐升高或降低到一定范围,算法中的亮度范围将会发生更新不合理现象,这将导致在目标检测时出现误判.为解决此问题,引入平均亮度与原算法中的亮度范围相融合,对亮度范围进行重新定义.实验表明,重新定义后的亮度范围能够随像素值变化正常更新.同时,与原始算法相比,改进后的算法对存在亮度逐渐变化的场景可以取得更加准确的检测效果.
One problem with codebook algorithms is that the brightness ranges can not update normally while the pixel brightness gradually increases or drops to a certain range with frames which are caused by the inaccurate definition of brightness ranges.To solve this problem,a new redefined brightness range based on mean brightness and fused with the original brightness range was constructed.Experimental results showed that the redefined brightness range is able to update normally as the algorithm represented;and the improved algorithm provides better detection results in brightness changing conditions.
出处
《中国计量学院学报》
2013年第3期266-271,共6页
Journal of China Jiliang University
关键词
码本
亮度范围
运动目标检测
背景建模
codebook
brightness range
moving object detection
background modeling
