基于熵图像和隶属度图的高斯混合背景模型
doi: 10.3724/SP.J.1146.2007.00049
Gaussian Mixture Background Model Based on Entropy Image and Membership-Degree-Image
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摘要: 经典的高斯混合背景模型中，高斯分量的个数是固定的，近邻像素间的相关性也没有被考虑。作为对这种模型的改进，该文利用熵图像来度量背景像素亮度分布的复杂程度，进而给出了根据熵图像为各像素选择高斯函数个数的方法，在保证检测精度的前提下节约计算资源；并利用隶属度来表示像素属于背景的可能性，通过融合各像素邻域的局部信息来对其进行有效的分类，使得分类决策的结果更可靠，而计算量却增加不多。多种真实场景下的实验证明了这种算法在计算速度和精度上的良好性能。Abstract: The number of Gaussian component is fixed and correlativity of class label between adjacent pixels is not considered in classical Gaussian mixture background model. As an improved version of the model, the main contribution of this paper is twofold. The first is to construct entropy image to measure the complexity of pixels intensity distribution, and further present the adaptation mechanism for automatically choosing the component number of Gaussian mixture model for each pixel according to entropy image so that the computational cost can be reduced without significantly sacrificing detection accuracy. The other is to use the membership degree to measure the degree that one pixel belongs to the background, and further fusion the local information within its adjacent region for effective pixel classification so that the classification decision becomes more reliable without significantly increasing the computation load. Experiments conducted on various real scenes demonstrate the good performance in computational speed and accuracy.
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