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Image calibration method and system under wide temperature range conditions

A range condition and image calibration technology, which is applied in radiation pyrometry, optical radiation measurement, instruments, etc., can solve the problems of narrow temperature dynamic range and poor non-uniformity, so as to improve processing effect, improve precision, and good image calibration technology required effect

Active Publication Date: 2019-01-22
HUBEI JIUZHIYANG INFRARED SYST CO LTD
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method that can satisfy the non-uniformity correction of infrared images in a large dynamic range in view of the defects of poor non-uniformity and narrow temperature dynamic range in the prior art. Requirements, image calibration method and system for eliminating image noise problems caused by non-uniformity under wide temperature range conditions

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  • Image calibration method and system under wide temperature range conditions
  • Image calibration method and system under wide temperature range conditions
  • Image calibration method and system under wide temperature range conditions

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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] Such as figure 1 As shown, the image calibration method under the wide temperature range condition of the embodiment of the present invention includes the following steps:

[0031] S1. Use uniform black body radiation at different temperatures as a reference source, divide it into multiple temperature segments from low temperature to high temperature, set multiple temperature points in each temperature segment, and output before and after correction according to a certain pixel of the infrared detector value, establish a multi-level equation;

[0032] The specific method of establishing mu...

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Abstract

The invention discloses an image calibration method and system under wide temperature range conditions. The method includes the following steps: S1. Using uniform black body radiation at different temperatures as a reference source, dividing it into multiple temperature sections from low temperature to high temperature, Set multiple temperature points in each temperature segment, and establish multiple order equations according to the output value of a certain pixel of the infrared detector before and after correction; S2. In a temperature segment, determine the selected one according to the accuracy of curve fitting The number of temperature points, and then solve the correction coefficient in the temperature section; and solve the correction coefficient of each temperature section; S3, add the drift compensation factor to the multi-level equation and decompose it, and solve the correction according to the least square method Correction coefficient, and then complete the non-uniform correction of the infrared image. The invention can meet the requirement of non-uniformity correction of infrared image in large dynamic range, and eliminate the problem of image noise caused by non-uniformity.

Description

technical field [0001] The invention relates to the field of non-uniformity correction of infrared images, in particular to an image calibration method and system under wide temperature range conditions. Background technique [0002] Due to its relatively strong environmental adaptability, infrared imaging has a strong ability to identify camouflaged targets, and its equipment has the characteristics of small size and low power consumption. Due to these characteristics, infrared imaging technology has played an important role in both military and civilian fields. However, due to the characteristics of infrared detectors, non-uniformity exists in infrared images and seriously affects its imaging quality. Therefore, in order to obtain clear infrared images, it is necessary to study non-uniformity correction technology. [0003] Non-uniformity correction can generally be divided into calibration of reference radiation sources and scene-based correction methods. Common tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/52
CPCG01J5/52G01J2005/0077G01J5/80
Inventor 张智杰洪普刘颖彬赵坤阮建斌宫文峰
Owner HUBEI JIUZHIYANG INFRARED SYST CO LTD
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