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Nonuniform correction method for thermal infrared imager

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

Active Publication Date: 2014-01-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

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

Method used

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  • Nonuniform correction method for thermal infrared imager
  • Nonuniform correction method for thermal infrared imager
  • Nonuniform correction method for thermal infrared 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 invention discloses a nonuniform correction method for a thermal infrared imager. The nonuniform correction method for the thermal infrared imager comprises the following steps: measuring the gray value of the infrared image of a black body and the gray value of the infrared image of a catch at at least two temperatures to obtain the function relationship between a black body image gray value and a catch image gray value; when the catch is used for carrying out nonuniform correction on the thermal infrared imager, converting the infrared image of the catch into a conversion image which satisfies the function relationship; and carrying out nonuniform correction by the conversion image. Therefore, the nonuniform correction comprises the nonuniform correction caused to a lens, and nonuniformity introduced in by the lens can be reduced or compensated together so as to improve the imaging quality of the thermal infrared imager.

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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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
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