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A Non-uniform Correction Method for Infrared Thermal Imager

An infrared thermal imager, non-uniformity correction technology, applied in the field of infrared thermal imager, can solve the problem that the non-uniformity of the lens cannot be eliminated

Active Publication Date: 2016-03-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing correction method cannot eliminate the non-uniformity of the lens

Method used

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  • A Non-uniform Correction Method for Infrared Thermal Imager
  • A Non-uniform Correction Method for Infrared Thermal Imager
  • A Non-uniform Correction Method for Infrared Thermal Imager

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Embodiment Construction

[0016] The principle and specific steps of the method for correcting the non-uniformity of the infrared thermal imager according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0017] An infrared thermal imaging camera usually includes an infrared focal plane array detector (hereinafter referred to as "detector") and a lens, and a barrier is usually set between the lens and the detector. The baffle is movable and can be in the blocking position (at this time the baffle is located on the optical path from the lens to the detector, that is, blocking infrared radiation from the lens to the detector) and the out of position (at this time the baffle is not located on the optical path from the lens to the detector) The optical path to the detector, allowing the infrared radiation to travel (for example, by rotating it) between the lens and the detector). The baffle is used for non-uniform correction of the i...

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Abstract

The embodiment of the present invention discloses a method for correcting non-uniformity of an infrared thermal imager, by measuring the gray value of the infrared image of the black body and the gray value of the infrared image of the baffle at at least two temperatures to obtain a black body image The functional relationship between the gray value and the gray value of the baffle image, when using the baffle to perform non-uniform correction on the infrared thermal imager, convert the infrared image of the baffle into a transformed image satisfying the functional relationship, and use the transformation The image is corrected for non-uniformity. In this way, this non-uniformity correction includes the correction of the non-uniformity caused by the lens, which can reduce or compensate the non-uniformity introduced by the lens, thereby improving the imaging quality of the infrared thermal imaging camera.

Description

technical field [0001] The invention relates to the technical field of infrared thermal imaging cameras, in particular to a non-uniform correction method for infrared thermal imaging cameras. Background technique [0002] Research on uncooled infrared focal plane detectors was established under the needs of national defense applications. At present, it has a wide range of applications and development prospects in industry, medical treatment, military affairs and other aspects. In recent years, there have been many studies on thermal imaging systems based on uncooled infrared focal plane detectors, and they have been gradually improved and matured. [0003] Non-uniformity is an important index to measure the performance of the detector and affect the imaging effect. In order to improve the imaging quality, it is necessary to correct the non-uniformity. The general non-uniformity correction method is only for the detector. Other factors affecting non-uniformity may be intr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/00G01J5/06
Inventor 刘子骥王梓又李宵马宣郑兴蒋亚东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA