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Infrared focal plane asymmetric correction method based on the motion detection guidance

A non-uniformity correction, infrared focal plane technology, used in color TV parts, TV system parts, TV and other directions

Inactive Publication Date: 2008-11-12
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0014] The present invention provides an infrared focal plane non-uniformity correction method based on motion detection guidance. Correction for uniformity

Method used

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  • Infrared focal plane asymmetric correction method based on the motion detection guidance
  • Infrared focal plane asymmetric correction method based on the motion detection guidance
  • Infrared focal plane asymmetric correction method based on the motion detection guidance

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Embodiment Construction

[0066] The following description uses several groups of sequence images collected from the actual 128×128 LW MCT IRFPA, and the collection frame rate is 100 frames per second. Such as figure 1 Shown, the concrete implementation process of the present invention is:

[0067](1) In the preprocessing step, before real-time correction, cover the lens cover of the infrared focal plane detector, or point the infrared focal plane detector to a blank place with no target and no scene, and respectively take the two groups collected in the blank scene The time-domain average of 10 frames of aircraft small target images and a group of 10 frames of hand and mobile phone images are used as three groups of background frame images B, such as Figure 3a ~ Figure 3c ; use detectors to collect two groups of original infrared images of aircraft small targets, such as Figure 4a , Figure 4b , and a set of raw infrared images of hands and phones, such as Figure 4c . Utilize the scene-based ...

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Abstract

An infrared focal plane nonuniformity correction method based on movement detection guidance belongs to the field of infrared focal plane detector and has an objective that it is self-adaptive, can effectively inhibit object degeneration and resolve problems of artifacts (ghosting artifact), and is easy to be realized through hardware. The present invention comprises (1) a pretreatment step, (2) a correction step, (3) an iterative step length adjusting step and (4) a plus correction cofficient renewal step. The present invention effectively resolves and depresses object degeneration and artifacts phenomena generated in scenes arithmetic, eliminates fixing pattern noises, and exhibits adaptability, wherein the calculation operations are simple and easy to be realized through hardware, achieving real-time performances.

Description

technical field [0001] The invention belongs to the field of infrared focal plane detectors, in particular to an infrared focal plane non-uniformity correction method based on motion detection guidance. Background technique [0002] Infrared focal plane array IRFPA (Infrared Focal Plane Array) imaging system is the development direction of infrared imaging technology and the core device of modern infrared imaging system. In the first generation of infrared imaging systems, linear detectors are used to realize imaging through one-dimensional optical-mechanical scanning. Compared with the first-generation infrared imaging system, the infrared focal plane array works in a staring manner, and does not require moving optical elements to perform one-dimensional or two-dimensional optical-mechanical scanning of the scene. Therefore, it has the advantages of simple structure, stable operation, high spatial resolution, strong detection ability, and high frame rate. At present, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/14H04N7/26
Inventor 张天序桑红石钟胜李洁珺袁雅婧施长城周泱刘慧娜
Owner HUAZHONG UNIV OF SCI & TECH
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