In the field of target detection, the technology which can identify the object from the complex background is of great significance to the development of ecology. In this paper, based on the spectral characteristics of the object reflection information, polarization and spectrum are combined to study the recognition algorithm of different objects under different background conditions. According to the polarization spectrum information of the object, an algorithm for estimating the refractive index of the object in multispectral polarization images is presented. With multispectral polarization experimental system, combined with multiwavelength information emitted by different objects, a set of algorithm suitable for multi-wavelength estimation of refractive index of objects was compiled by introducing Cauchy dispersion equation reasonably, so as to realize the identification of different object. The experimental results show that the color images can be obtained by fusing the gray images with chromatic dispersion coefficients, which represent the material properties of objects, and various objects can be recognized easily and intuitively from different colors; According to the algorithm, the refractive index of the metal material used in the experiment is complex refractive index, and the refractive index of the oil is maintained between 1.3 and 1.5 at a certain wavelength, so that the object recognition is realized.
In order to better characterize the polarization characteristics of reflected light in oil spill monitoring by remote sensing on the sea surface and improve the accuracy of oil spill detection, the quaternion method is introduced into the oil spill detection system, and a kind of oil spill monitoring technology based on quaternion is proposed in this paper. Firstly, the quaternion matrix method for calculating the sea surface reflection polarization information is proposed, and the relationship between the characteristic parameters of quaternion and the refractive index of oil film is discussed. Then, four kinds of oils crude oil, soybean oil, lubricating oil and diesel oil are used as the experimental samples for oily pollution on water surface, and the characteristic quaternion parameters, s and p components of different samples are obtained through the reflection images at different polarization directions, so the identification of different oil products is realized.. The experimental results show that the quaternion polarization characteristics can be used as an important parameter for oil identification.
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