Xu Chao, Zhang Dongping, Zhang Zhengning, Feng Zhiyong
School of Computer Software, Tianjin University, Tianjin 300072, China.
Space Star Technology Co., Ltd., Beijing 100086, China.
ScientificWorldJournal. 2014;2014:171978. doi: 10.1155/2014/171978. Epub 2014 Apr 3.
Ship detection in static UAV aerial images is a fundamental challenge in sea target detection and precise positioning. In this paper, an improved universal background model based on Grabcut algorithm is proposed to segment foreground objects from sea automatically. First, a sea template library including images in different natural conditions is built to provide an initial template to the model. Then the background trimap is obtained by combing some templates matching with region growing algorithm. The output trimap initializes Grabcut background instead of manual intervention and the process of segmentation without iteration. The effectiveness of our proposed model is demonstrated by extensive experiments on a certain area of real UAV aerial images by an airborne Canon 5D Mark. The proposed algorithm is not only adaptive but also with good segmentation. Furthermore, the model in this paper can be well applied in the automated processing of industrial images for related researches.
静态无人机航空图像中的船舶检测是海上目标检测和精确定位中的一项基本挑战。本文提出了一种基于Grabcut算法的改进通用背景模型,用于自动从海面分割出前景物体。首先,构建一个包含不同自然条件下图像的海模板库,为模型提供初始模板。然后通过将一些模板与区域生长算法相结合来获得背景三通道图。输出的三通道图初始化Grabcut背景,无需人工干预且分割过程无需迭代。通过使用机载佳能5D Mark对某一区域的真实无人机航空图像进行大量实验,证明了我们提出的模型的有效性。所提出的算法不仅具有自适应性,而且分割效果良好。此外,本文中的模型可很好地应用于相关研究的工业图像自动处理中。