Mechanism and calibration of non-uniformity for IR polarization imagery obtained with integrated micro-polarizer array

Hai-zheng, 刘海峥 Liu; Ze-lin, 史泽林 Shi; Bin, 冯斌 Feng

doi:10.3788/ope.20182602.0480

Cited by 4 publications

(1 citation statement)

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“…With reference to the response characteristics of random blind elements, in order to comprehensively consider the effects of micro polarizer array and focal plane response, realize the distinction between random blind elements and point targets, and finally achieve high-precision correction, it is necessary to establish the detection method of response value pulse point to determine whether the response point is a blind element. In the polarized light pixel coupled image detection system, when a random blind element appears in a single PP, the calculated value of the Stokes vector 0 S will suddenly increase or decrease compared with the surrounding PP, and a local extreme value will be formed [4] . Therefore, the ergodic method can be used to calculate the second-order partial derivatives of s in the horizontal and vertical directions to find the pulse points.…”

Section: Blind Element Detectionmentioning

confidence: 99%

A blind element detection and correction method for pixel coupled infrared polarization imaging system

Yang

Zhao

2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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In order to improve the accuracy of pixel coupled infrared polarization imaging system, based on the analysis of the characteristics of blind elements, a blind element detection and correction method based on the nearest neighbor parameter is proposed. Blind elements are detected by two-way derivative operation in Stokes vector, the concepts of nearest neighbor and reference polarization pixel are introduced, and the identification methods of fixed blind elements, random blind elements and point targets are classified. According to the polarization parameter distribution in the neighborhood of the blind element, the blind element correction is realized. The experimental results show that this method can effectively improve the acquisition ability of polarization information of incident light, reduce the system error, and improve the detection accuracy of the pixel coupled polarization imaging system.

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Section: Blind Element Detectionmentioning

confidence: 99%

A blind element detection and correction method for pixel coupled infrared polarization imaging system

Yang

Zhao

2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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Calibration method for thermal infrared division-of-focal-plane polarimeters considering polarizer reflection characteristics

Yang,

Cui,

et al. 2023

Appl. Opt.

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Owing to manufacturing defects of micropolarizer arrays and differences in the pixel response of detectors, division-of-focal-plane (DoFP) polarimeters have severe nonuniformity, which affects the measurement accuracy of the polarimeters and the calculation of the polarization information. This study proposes a calibration method for thermal infrared DoFP polarimeters considering polarizer reflection characteristics. The temperature-controlled adjustable infrared polarized radiation source is calibrated by a division-of-time polarimeter and is, in turn, used to calibrate a thermal infrared DoFP polarimeter. Through laboratory blackbody and external scenes, the performance of the proposed method is compared to that of state-of-the-art techniques. The experimental results indicate that the proposed method effectively avoids overcalibration and improves the accuracy of polarization information.

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热成像模式及其图像处理技术的研究与应用

Jin Weiqi,

Li Li,

Wang Xia

2023

光学学报

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Mechanism and calibration of non-uniformity for IR polarization imagery obtained with integrated micro-polarizer array

Cited by 4 publications

References 0 publications

A blind element detection and correction method for pixel coupled infrared polarization imaging system

A blind element detection and correction method for pixel coupled infrared polarization imaging system

Calibration method for thermal infrared division-of-focal-plane polarimeters considering polarizer reflection characteristics

热成像模式及其图像处理技术的研究与应用

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