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Real-time compensation method of non-uniformity correction residual errors of infrared focal plane array detector

A non-uniformity correction, array detector technology, applied in radiation pyrometry, instruments, measurement devices, etc., to achieve the effect of improving temperature resolution and reducing deviation

Inactive Publication Date: 2012-07-18
HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
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Problems solved by technology

However, the existing calibration calibration methods for reference radiation sources have not been able to solve the calibration residual error caused by offset drift.

Method used

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  • Real-time compensation method of non-uniformity correction residual errors of infrared focal plane array detector
  • Real-time compensation method of non-uniformity correction residual errors of infrared focal plane array detector
  • Real-time compensation method of non-uniformity correction residual errors of infrared focal plane array detector

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Embodiment Construction

[0022] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0023] refer to figure 1 , the present embodiment is an infrared focal plane array (IRFPA) detector non-uniformity correction residual real-time compensation method, comprising the following steps:

[0024] 1) Set the blackbody radiation source at any temperature point within the dynamic range of the detector response, and use the IRFPA detector to collect the blackbody radiation data F(Φ 0 );

[0025] 2) Close the shutter of the imaging system, and use the IRFPA detector to collect the uniform background radiation response output F(Φ 1 );

[0026] 3) Radiate F(Φ) with a black body 0 ) is used as a reference value to perform one-point calibration correction on the uniform background radiation, and the correction result is obtained

[0027] ...

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Abstract

The invention discloses a real-time compensation method of non-uniformity correction residual errors of an infrared focal plane array (IRFPA) detector. The method introduces weighted uniform background correction residual errors to compensate the calibration errors of an actual scene aiming to requirements on residual error inhibition by correction output of non-uniformity responses of the IRFPA detector; and radiation source calibration is combined with a residual error cancellation method, so as to inhibit the residual non-uniformity of the IRFPA detector, effectively reduce the deviation between a calibrated response value and an actual scene radiation value, and improve a temperature resolution ratio of the IRFPA detector.

Description

technical field [0001] The invention belongs to the technical field of digital signal processing, is a digital image restoration method, specifically relates to a non-uniformity correction method based on the combination of radiation source calibration and residual cancellation, and is suitable for infrared focal plane array (IRFPA) ) real-time compensation of detector non-uniformity correction residuals. Background technique [0002] The introduction of IRFPA detectors enables modern infrared imaging systems to simultaneously obtain excellent performance in terms of spatial resolution, temperature resolution, and time resolution. However, affected by factors such as material, manufacturing process and working environment, each detector element of IRFPA usually outputs different responses under the same irradiation conditions, and the inconsistency of this response is called inhomogeneity. Since the existence of non-uniformity will significantly reduce the signal-to-noise r...

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Application Information

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IPC IPC(8): G01J5/00
Inventor 赖睿张智杰杨银堂
Owner HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
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