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Operating range estimation method of infrared imaging system under complex background condition

An infrared imaging system and technology of working distance, applied in the field of infrared imaging, to achieve the effect of reducing the amount of calculation

Inactive Publication Date: 2010-12-29
BEIHANG UNIV
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Problems solved by technology

However, this method breaks away from the principle of action distance generation, and its correctness cannot be proved theoretically, and the experimental results are quite different from the actual situation.
In further searches, so far no report on the estimation method of the infrared imaging system operating distance in complex backgrounds has been found.

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  • Operating range estimation method of infrared imaging system under complex background condition
  • Operating range estimation method of infrared imaging system under complex background condition
  • Operating range estimation method of infrared imaging system under complex background condition

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Embodiment Construction

[0055] In order to accurately describe the process of the present invention, the infrared imaging system used for estimating the working distance is named "target imaging system", and the infrared imaging system used to obtain the background image is named "auxiliary imaging system".

[0056] The parameters of the "target imaging system" in this example are as follows: the effective area of ​​the optical system A 0 =12.0(cm 2 ), detector star responsivity D * = 2 × 10 10 ( cm Hz / W ) , Detectable minimum signal-to-noise ratio SNR=4, detector area A d =0.4(mm 2 ), the equivalent noise bandwidth Δf = 2000.0 (Hz), the infrared radiation transmittance τ of the optical system 0 =0.8, signal attenuation factor δ≈1; the imaging bands of the "target imaging system" and "auxiliary imaging sys...

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Abstract

The present invention relates to a method for estimating an infrared imaging system action distance under a complex background condition. Firstly, an infrared imaging system action distance estimating model which is effective towards the complex background condition is established and comprises an action distance equation and an action distance resolving method; secondly, an auxiliary imaging system is used for obtaining an infrared image with complex background to be studied; thirdly, the auxiliary imaging system is scaled for confirming the function of the system infrared radiation lightness related to imaging gray scale; fourthly, the infrared radiation lightness under the complex background at the entrance pupil of the auxiliary imaging system is determined; fifthly, the infrared radiation lightness transmitted for zero distance under the complex background is determined; sixthly, target infrared radiation lightness and target effective area are determined; seventhly, the curve ofthe relation between infrared radiation transmissivity and imaging distance is worked out; eighthly, related data is substituted in the action distance estimating model established by the present invention, and the calculation of the action distance of a target imaging system towards the target under the complex background is finished finally.

Description

(1) Technical field: [0001] The invention relates to a performance evaluation method of an infrared imaging system, in particular to a method for estimating the working distance of an infrared imaging system under a complex background. It belongs to the technical field of infrared imaging. (two) background technology: [0002] The application of infrared imaging system in the aspects of target search and tracking, aiming, guidance and so on when fighting at night or in bad weather shows the great superiority of infrared detection. The more and more extensive application makes the research on the performance of infrared imaging system more and more important. In-depth, as an important parameter to evaluate the performance of infrared imaging system - the working distance has become the focus of attention. The operating range of an infrared imaging system is not only related to the performance of the imager itself, but also related to the influence of the atmosphere on infra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00
Inventor 毛峡刁伟鹤黄康
Owner BEIHANG UNIV
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