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    多特征组合和图切割支持的物体/背景分割方法

    Combination of Multiple Features for Object/Background Segmentation Using Graph Cut

    • 摘要: 运动物体分割是计算机视觉应用领域中的一个基本问题,阴影和亮度变化均易造成分割结果错误.通过组合多种图像特征,实现了一种新的检测运动物体方法.一方面,组合图像的颜色、梯度和纹理特征,利用梯度和纹理信息对亮度变化不敏感的特性,提高运动物体分割的准确性;另一方面,使用图切割算法对物体/背景进行分割,在不影响整体分割结果前提下修正局部判别错误的像素点,分割结果噪声少且稳定性强.对不同场景的分割结果表明,该方法是高效的和实用的.

       

      Abstract: Moving objects segmentation is a fundamental problem in many computer vision applications, which aims at detecting regions corresponding to moving objects such as vehicles and people in natural scenes. It is known to be a significant and difficult problem. Changes from illumination and shadow make segmentation difficult to process quickly and reliably. In this paper, a novel method is proposed to detect moving objects based on the linear combination of multiple features. Firstly, the color, gradient and texture features are synchronously used to construct background model, and the statistics of the background can be updated dynamically during processing. Because gradient and texture features are insensitive to illumination change, the method can improve accuracy of the objects segmentation. Secondly, graph cut algorithm is employed to compute the objects segmentation. Researchers have traditionally used combinations of morphological operations to remove the noise inherent in the result. Such techniques can effectively isolate foreground objects, but tend to lose fidelity around the borders of the segmentation, especially for noisy input. Graph cut algorithm results in qualitatively and quantitatively cleaner segmentation. Results can be temporally stabilized from frame to frame. The experimental results of different real scenes show that the proposed method is effective and practical.

       

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