| 各向异性的红外背景预测方法 |
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| 引用本文： | 张强, 蔡敬菊, 张启衡. 各向异性的红外背景预测方法[J]. 强激光与粒子束, 2012, 24: 301-306. |
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| 作者姓名： | 张强 蔡敬菊 张启衡 |
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| 作者单位： | 1.中国科学院 光电技术研究所, 成都 61 0209;;;2.中国科学院 研究生院, 北京 1 00039 |
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| 摘 要： | 为了减少红外图像中起伏背景对弱小目标检测的影响，提出一种各向异性的红外背景预测方法。根据红外图像目标区域和平稳背景区域、起伏背景区域的局部梯度特性的差异，引入各向异性微分的思想，并将其边缘停止函数改进为方向梯度值的递增函数，然后用边缘停止函数最小两个方向值的均值作为背景预测值，实现了对不同方向特性背景区域的差异化预测。仿真实验表明，该算法选择性地保留了红外图像的平稳背景和起伏背景区域，达到了良好的背景预测效果。
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| 关 键 词： | 各向同性 梯度算子 各向异性微分 边缘停止函数 |
| 收稿时间： | 2011-07-07 |
| 修稿时间： | 2011-11-08 |
Anisotropic infrared background prediction method |
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| Zhang Qiang, Cai Jingju, Zhang Qiheng. Anisotropic infrared background prediction method[J]. High Power Laser and Particle Beams, 2012, 24: 301-306. |
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| Authors: | Zhang Qiang Cai Jingju Zhang Qiheng |
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| Affiliation: | 1. Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;;;2. Graduate University of Chinese Academy of Sciences,Beijing 100039,China |
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| Abstract: | For reducing the effect of undulate background in dim infrared targets detection, an anisotropic method is presented for infrared background prediction. According to differences of local gradient character among target region, smooth background region and undulate background region, the edge stopping function of anisotropic partial differential equations is improved to an increasing function with the value of the direction grads. Then the mean of the two least values of the edge stopping function is derived as the prediction value of the background. Simulation results show that the method selectively retains the smooth background region and the undulate background region, and achieves good prediction of background. |
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| Keywords: | isotropy grads operator anisotropic partial differential equations edge stopping function |
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