紅外探測(cè)器非均勻校正算法研究
[Abstract]:The inhomogeneity of infrared image is accompanied by infrared focal plane array (Infrared Focal Plane Arrays,IFPA). The inhomogeneity in infrared image appears as fixed pattern noise, which seriously limits the imaging quality of infrared imaging system. At present, there are mainly black-based calibration methods and scene correction methods in the international non-uniformity correction of infrared images. This paper first introduces the composition of infrared imaging system and the development of infrared detectors, and introduces the classification and development of infrared image nonuniformity correction methods. Then the definition and source of nonuniformity and two response models of infrared detector are introduced. At the same time, several typical nonuniformity correction algorithms are introduced, and their basic principles, processing steps, advantages and disadvantages are analyzed. Then, the basic principle, processing steps, advantages and disadvantages of various image registration methods are introduced, and the basic principle and processing steps of infrared image non-uniform correction algorithm based on image registration are introduced in detail. The influence of moving target on the algorithm is analyzed. The method of cloaking the scene of the whole moving object by near frame is used to solve the problem of non-uniform correction of infrared image with moving object. The effectiveness of the algorithm is verified by simulation scene and real scene. Finally, the deformation mode, direction and range of the moving target are analyzed in detail, and the criterion of the deformation target is given, and the method of inter-frame replacement of the deformed target is given. A non-uniform correction algorithm for infrared images with deformed targets is proposed. The effectiveness of the algorithm is verified by simulated infrared sequential image correction experiments.
【學(xué)位授予單位】:國(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類(lèi)號(hào)】:TP391.41;TN215
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