高温目标辐射特征波段转换方法研究

发布时间：2018-04-05 20:24

本文选题：高温目标　切入点：辐射特征　出处：《中国科学院研究生院（上海技术物理研究所）》2014年硕士论文

【摘要】：目标羽焰会产生极强的红外辐射，是最为明显的高温目标，尾焰在2.7μm和4.3μm波段附近有较强的红外辐射。同时，地球上的高温现象也是普遍存在的，如火山喷发、森林大火等。这些高温现象的发生都会向外辐射大量的电磁波，引起热异常。由于高温目标具有突发性、温度高等特点，无法现场测量，而应用遥感技术可以方便地实现大范围监测，，在各领域被广泛应用。若要在红外波段有效探测导弹目标，则需要提供大量红外图像进行分析，但是目前以2.7μm和4.3μm为中心波长的波段成像较少。为了解决这一问题，对可能产生干扰的高温目标进行波段转换，进行红外成像的仿真是一种有效的途径。本文在深入研究高温目标遥感成像机理的基础上，根据高温目标和周围环境的差异特征对高温目标进行识别与提取，对高温目标的辐亮度进行仿真，通过统计分析方法建立波段间的关系。从高温目标遥感特征识别、高温目标数据仿真、高温目标波段转换关系建模等方面详细阐述高温目标波段转换方法，并且针对冰岛区域的火山图像进行转换分析。本文的主要研究内容如下：（1）选择合适的高温目标识别方法对高温目标进行识别、提取。目前国内外对高温目标的识别方法研究较多，但是针对不同环境、不同目标的识别仍有差异，本研究中结合目标环境采用合适的识别方法对高温目标进行识别并提取。（2）首次提出对不同波段的仿真数据进行建立转换关系。从遥感成像的机理出发，针对相同的目标，相同的探测器，不同的波段成像差异为受大气辐射传输的影响不同。采用辐射传输模型进行不同波段的数据仿真，对数据进行分析，建立波段转换关系，提出仿真成像的新方法。（3）对波段转换模型进行应用并验证。建立波段转换方法的目的是通过已知波段图像转换得到未知波段的图像，这对转换结果的验证造成了一定的困难。本文选取一已知波段作为目标波段，利用波段转换方法进行转换，转换结果与原图像值进行对比，以此验证本文建立的波段转换方法的可行性。
[Abstract]:The target of plume infrared radiation will produce a strong, high temperature is the most obvious target, the plume has stronger infrared radiation in the vicinity of 2.7 m and 4.3 m wavelength. At the same time, the phenomenon of high temperature of the earth is widespread, such as volcano eruption, forest fires. These high temperature phenomenon happens will radiate electromagnetic wave caused by large amount of heat anomaly. Due to the high temperature target is sudden, high temperature, no field measurement, and the application of remote sensing technology can easily realize large-scale monitoring, is widely used in various fields. To effectively detect the infrared missile target, you need to provide a large amount of infrared image analysis, but the 2.7 m and 4.3 m wavelength band imaging is less. In order to solve this problem, the spectral conversion of the high temperature target may interfere with the simulation of infrared imaging is an effective way.
Based on the study of high temperature target remote sensing imaging mechanism, based on the high temperature target recognition and extraction temperature difference of targets and environment characteristics of high-temperature target radiance simulation, analysis of the relationship between the statistical methods to establish the band. From the high temperature remote sensing target feature recognition, target data simulation on high temperature, high temperature target band switching relationship modeling detail conversion method of high temperature target band, and according to the analysis of Iceland regional image conversion volcano. The main contents of this paper are as follows:
(1) selection of high temperature target recognition method suitable for recognition of high-temperature target extraction. The research on the target recognition method of high temperature at home and abroad, but according to different environment, different target recognition are different, this study combines the target environment with appropriate identification methods for identifying and extracting of high temperature target.
(2) first proposed conversion relationship is established for the simulation data of different bands. Starting from the mechanism of remote sensing imaging, for the same goal, the same detector, imaging differences of different influence on atmospheric radiative transfer simulation. Using different data of different wavelength radiation transmission model, analysis of the data, set up the conversion the relationship between bands, we proposed a new method of imaging simulation.
(3) the band switching model and verify the application. A band conversion method is to obtain images of unknown bands by a known band image conversion, thus it is difficult to verify the conversion results. This paper selects a band known as the target band, conversion wave section conversion method, the conversion results were compared with the the original image in order to verify the feasibility of the conversion value, this method is the band.

【学位授予单位】：中国科学院研究生院（上海技术物理研究所）
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P237

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