Adaptive integral time based embedded infrared image superframe processing method

An integration time and infrared image technology, applied in the field of infrared imaging, can solve the problems such as the integration time cannot be adaptively adjusted for radiation temperature, image non-uniformity, and image non-uniformity correction measures, so as to solve the problem of detector non-uniformity and improve SNR. , the effect of extending the dynamic range

Active Publication Date: 2015-05-13
KUNMING INST OF PHYSICS
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Problems solved by technology

[0007] The present invention proposes an embedded infrared image super-frame processing method based on self-adaptive integration time, the purpose of which is to utilize the advantages of the infrared image super-frame processing method to improve the detection sensitivity of the infrared imaging system and expand the dynamic range of the infrared imaging system. Effectively solve the problem that the integration time of sub-frame acquisition in the traditional super-f

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  • Adaptive integral time based embedded infrared image superframe processing method
  • Adaptive integral time based embedded infrared image superframe processing method

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[0035] Below in conjunction with the accompanying drawings, the present invention will be further described in detail by taking the refrigerated long-wave 640x512 focal plane detector SCORPIO-LW produced by the French SOFRADIR company as an example, but the scope of protection of the present invention is not limited to the following embodiments.

[0036] This type of detector is currently often used to build civilian observation infrared imaging systems. The final video output of the imaging system in this embodiment uses standard digital CameraLink video output with a frame rate of 40 frames per second. For this type of detector, its readout circuit can provide the fastest analog original signal output of 210 frames per second. The steps of the present invention are described in detail below:

[0037] A offline calibration:

[0038] A1 combined with figure 1 , first determine the number of detector integration times and the number of groups of non-uniformity correction para...

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Abstract

The invention provides an adaptive integral time based embedded infrared image superframe processing method, and aims at exerting the advantage of the infrared image superframe processing method on improving the detection sensitivity and dynamic range of an infrared imaging system, effectively solving the shortage that the integral time of acquiring sub-frames in the traditional superframe processing method cannot be adaptively adjusted according to the target scene radiation temperature, as well as guiding well a detector to work in a medium area within the whole response rang. The method comprises the steps of offline calibration and online processing. The invention further provides a correction measure for the problem of non-uniformity of an image caused by the adjusting of the integral time of the detector. The method is an embedded platform based infrared image superframe processing method and does not need any special device during implementing; in addition, the method can be applied to real-time engineering.

Description

technical field [0001] The invention relates to an embedded infrared image superframe processing method based on self-adaptive integration time, belonging to the technical field of infrared imaging. Background technique [0002] Due to the many advantages of infrared imaging systems, in addition to being widely used in the field of national defense, it is also receiving more and more attention in civilian fields such as security, meteorology, medical treatment, and industrial inspection. In recent years, with the rapid development of some basic research related to infrared imaging technology, and the increasing demand for objective applications, the research and development of infrared imaging systems with high sensitivity and large dynamic range has become a continuous trend in the industry. The goal to pursue. [0003] As the core component of the infrared imaging system, the infrared detector realizes the conversion of infrared radiation to photocurrent. The function of...

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Application Information

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IPC IPC(8): H04N5/33H04N5/353G01J5/22
Inventor 洪闻青姚立斌姬荣斌刘传明苏俊波陈树刚赵灿兵
Owner KUNMING INST OF PHYSICS
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