大气与环境光学学报 ›› 2014, Vol. 9 ›› Issue (4): 289-294.

• 光学遥感 • 上一篇    下一篇

地物散射光偏振特性研究

甘桂华   

  1. (电子工程学院,安徽 合肥 230037)
  • 收稿日期:2013-09-29 修回日期:2013-12-18 出版日期:2014-07-24 发布日期:2014-07-24
  • 通讯作者: 甘桂华 (1982-),女, 汉族,安徽省安庆市人,助理工程师,主要从事偏振探测研究。 E-mail:guihuagan@163.com
  • 作者简介:甘桂华 (1982-),女, 汉族,安徽省安庆市人,助理工程师,主要从事偏振探测研究。

Polarization Characteristic of Scattered Beam from Object

GAN Gui-hua   

  1. (Electronic Engineering Institute,Hefei 230037,China)
  • Received:2013-09-29 Revised:2013-12-18 Published:2014-07-24 Online:2014-07-24

摘要:

利用镜面反射模型,在可见光和近红外波段内,在自然光照条件下,对铝板和水泥地面对 光和 光的反射率以及反射光的偏振度、光强对比度和偏振对比度进行了理论推导和数值计算。研究表明,在自然光照条件下,目标的偏振特性来源于其对 光和 光反射能力的差异,这种差异受到入射角度、入射波长、目标表面的粗糙度以及目标表面材料折射率等因素的影响,并直接影响着目标和背景反射光光强对比度和偏振对比度的大小。目标与背景材料表面特性的研究对复杂背景下目标的有效探测具有重要的理论意义和应用价值。

关键词: 反射率, 偏振度, 光强对比度, 偏振对比度

Abstract:

The reflectivity, polarization degree, intensity contrast and polarization contrast of s light and p light which scattered from aluminous plane and concrete floor, were theoretically calculated based on the specular reflected model at visible and near infrared under natural illumination condition. The results of calculation and analysis indicated that the polarization characteristics of object were determined by the difference of reflected capabilities of s light and p light. Then the difference was influenced by incident angle, wavelength, the surface roughness of object and the refractive index of the material. And the intensity contrast and polarization contrast were influenced by them firsthand. Consequently, the surface characteristics of object and background are of great significance for object detection and recognition in the mix natural background.

Key words: reflectivity, polarization degree, intensity contrast, polarization contrast

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