A method for adaptive adjustment of high dynamic range of infrared thermal imager

An infrared thermal imager, high dynamic range technology, applied in the field of self-adaptive adjustment, can solve problems such as difficulty in adapting to changing scenes, fixed dynamic range, etc., to achieve the effect of optimizing imaging effects and avoiding imaging abnormalities

Active Publication Date: 2020-06-05
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
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Problems solved by technology

[0009] The purpose of the present invention is to provide an adaptive adjustment method for the high dynamic range of an infrared thermal imager, which solves the problem that the dynamic range is fixed and it is difficult to adapt to changing scenes in the operation of a cooling infrared thermal imager.

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  • A method for adaptive adjustment of high dynamic range of infrared thermal imager

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Embodiment Construction

[0021] A high dynamic range adaptive adjustment method for an infrared thermal imager, comprising the following steps:

[0022] S1: Parameter collection; use the high-precision surface source black body 2 as the standard reference source, and use the cooled staring infrared thermal imager 1 to perform normal imaging and output digital video. The temperature of the high-precision surface source blackbody 2 can be adjusted, the integration time of the cooling type staring infrared thermal imager 1 can be switched between multiple setting values, and the upper computer 3 processing program can store the average value of the gray scale and the average value of the central area of ​​the current imaging image in real time , so as to obtain the original data corresponding to the gray value response of the digital image under different external radiation conditions and different integration times.

[0023] S2: Data processing; first, establish the relationship between the response of ...

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Abstract

A high dynamic range self-adaptive adjustment method for an infrared thermal imager, comprising the following steps: S1: parameter acquisition; using a high-precision area source black body as a standard reference source, using a cooling staring infrared thermal imager for normal imaging and outputting digital video; The temperature of the high-precision surface source black body can be adjusted, and the integration time of the cooling staring infrared thermal imager can be switched between multiple setting values; S2: data processing; first, establish different integration times of the cooling staring infrared thermal imager, and secondly, Design integration time switching logic and threshold; S3: multi-segment two-point calibration; use surface source black body, under different integration time gears, use the general two-point calibration algorithm offline to calculate the correction gain value and offset value; S4: Real-time optimization; integrate the integration time switching logic and threshold algorithm in S2 into a programmable FPGA hardware development method to form a program and solidify it into the imaging circuit.

Description

technical field [0001] The technology belongs to the field of self-adaptive adjustment, and in particular relates to a method for self-adaptive adjustment of a high dynamic range of an infrared thermal imager. Background technique [0002] Infrared imaging technology is a technology that converts the difference in infrared radiation generated by the surface of each object in the target field of view due to differences in temperature or emissivity into visible images. In the military field, infrared imaging is widely used in the search, sight, reconnaissance, identification and tracking of military targets; the monitoring, warning, early warning and tracking of long-, medium- and short-range military targets; the precise guidance of infrared imaging; weapon platforms Driving and navigation; detection of stealth weapon systems, photoelectric countermeasures, etc. [0003] The energy conversion process involved in infrared imaging detection is: after the optical energy is conv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/00
CPCG01J5/00G01J2005/0077G01J5/80
Inventor 董斐刘晗傅强林森
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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