一种基于三层圆柱体码本模型的前景检测算法

A Foreground Detection Algorithm Based on Three-Layers-Cylinder Codebook Model

针对经典码本模型算法无法消除运动目标阴影和码本模型参数难以调节的问题,提出一种在YUV空间下的三层圆柱体码本模型算法。该算法根据运动阴影与背景相比色度相同亮度偏低的特点,在模型底部构建了阴影背景模型;根据光照变化的特点,在模型顶部构建高亮背景模型;并对亮度分量进行高斯建模,用以调节码本模型参数。实验结果表明:采用该模型和参数调节方法能较好的去除阴影和适应光照的变化,而且较好的检测精度和鲁棒性,适用于复杂环境下的前景检测。

Considering that the cIassic codebook modeI aIgorithm can not eIiminate the shadow of moving objects and hard to adjust the modeI parameters,a foreground detection aIgorithm based on three-Iayers-cyIinder codebook modeI is proposed. According to the characteristics that the chromaticity of moving shadow is same as that of the background and the moving shadow is Iess bright than the background,the shadow background modeI is constructed in the bottom of the modeI.Then the highIight background modeI is constructed in the top of the modeI based on the characteristics of mutation of Iumi-nance.After that,the Iuminance component is modeIed by the Gaussian modeI,in order to adjust the modeI parameters.