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哈尔滨理工大学
收稿日期:2007-09-24,
修回日期:2007-10-28,
网络出版日期:2008-01-22,
纸质出版日期:2008-01-22
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姜永林,屈桢深,王常虹,施云波. 基于纹理及统计特征的视频背景提取研究[J]. 光学精密工程, 2008,16(1):172-177
Study on Video Background Extraction Based on Textural and Statistical Features[J]. Optics and precision engineering, 2008, 16(1): 172-177.
背景提取是视频监控及运动跟踪的基本问题,针对交通视频监控应用中图像亮度变化和路口交通繁忙的实际特点,提出基于纹理特征及统计学模型的背景提取方法,完成背景的稳健提取和实时更新。首先根据灰度—基元共生矩阵建立图像的纹理特征描述并据此初步判断某一区域是否有运动目标,进一步基于混合高斯分布模型进行背景像素判别和背景提取,最后应用多分辨率计算方法提高算法实现效率。实验结果表明,该方法能够更好的适应光照条件的不同变化,同时在交通状况繁忙的路口也能够准确的获取背景图像,计算时间仅为原来的1/4,从而满足背景提取算法在复杂环境下稳健性和实时自适应更新的要求。
Background extraction is a fundamental problem in video surveillance and motion tracking. Considering actual conditions in traffic video surveillance where image brightness varies over time and crossroad vehicle occupancy often keeps high
a new background extract method is put forward based on textural and statistical features. First
textural description of the image is established with grayscale-primitive cooccurence matrix. Then the textural feature is used to roughly evaluate the presence of moving targets in a region. In the next step
background pixels are determined according to the mixed Gaussian distribution model
by which the background of video sequence is extracted. Finally
the multi-resolution method is introduced to improve the computational efficiency. Experimental results show that the proposed method allows various changes of lighting conditions
and extracts exact background scenes even in vehicle-packed crossroad with only 1/4 computation period of the original method. Therefore
the method can better satisfy the requirements of background extraction algorithm
which needs to be robust and automatically adapt to complex environment.
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