FPGA-based infrared image real-time distortion correction method and system

A distortion correction, infrared image technology, applied in the field of infrared imaging, can solve the application limitations of infrared distortion correction technology and other problems, to ensure the effect of infrared image distortion correction, improve industrial use value, and achieve the effect of system reusability

Active Publication Date: 2022-02-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of application limitations of the existing infrared distortion correction technology, the present invention provides an FPGA-based real-time distortion correction method for infrared images

Method used

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  • FPGA-based infrared image real-time distortion correction method and system
  • FPGA-based infrared image real-time distortion correction method and system
  • FPGA-based infrared image real-time distortion correction method and system

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Embodiment 1

[0061] This embodiment proposes a real-time distortion correction method for infrared images based on FPGA, such as figure 1 As shown, the method of the present embodiment includes the following steps:

[0062] Step 1, collecting infrared imaging data to obtain original infrared distortion image data.

[0063] In this embodiment, the infrared imaging detector and the infrared imaging lens are used to perform infrared imaging on the detection target to obtain the original infrared distortion image data IRO.

[0064] Step 2, calculating distortion correction parameters of multiple sets of infrared imaging lenses.

[0065] In this embodiment, the distortion correction parameters of the infrared imaging lens are determined according to the focal length f of the infrared imaging lens, the distortion rate γ of the infrared imaging lens, the resolution M*N of the infrared detector, and the pixel size μ of the infrared detector; In this embodiment, the distortion correction paramete...

Embodiment 2

[0106] This embodiment proposes a real-time distortion correction system for infrared images based on FPGA, such as figure 2 As shown, it includes data acquisition module, Flash module, filter module, noise reduction module, DDR storage module and correction module.

[0107] Wherein, the data collection module collects infrared imaging data to obtain original infrared distortion image data. The data acquisition module uses an infrared imaging detector and an infrared imaging lens to perform infrared imaging on the detection target to obtain the original infrared distortion image data IR0.

[0108] The Flash module is used to store multiple sets of infrared imaging lens de-distortion reverse mapping address data. In this embodiment, the initial access read address of the flash data can be determined according to the selected infrared imaging lens, so as to obtain the distortion correction parameters of the infrared imaging lens.

[0109] The filtering module adopts a guided ...

Embodiment 3

[0117] In this embodiment, the calibration method proposed in Embodiment 1 above is used for image 3 An original infrared distorted image as shown is processed to obtain the following image 3 Corrected image shown.

[0118] Depend on figure 2 It can be seen that the original infrared distorted image has serious image distortion and distortion; image 3 From the corrected images shown, it can be seen that after being processed by the correction method of the present invention, the infrared distortion image is corrected well, and good imaging quality is obtained.

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Abstract

The invention discloses an FPGA-based infrared image real-time distortion correction method and system. The method comprises the steps of carrying out the infrared imaging data collection of a target, and obtaining original infrared distortion image data, according to the selected infrared imaging lens, obtaining a distortion correction parameter corresponding to the infrared imaging lens from pre-stored distortion removal reverse mapping address data corresponding to a plurality of groups of distortion correction parameters of the infrared imaging lens, carrying out filtering and inter-frame noise reduction processing on the original infrared distortion image data, and performing image correction on the infrared image data after filtering and inter-frame noise reduction processing according to the obtained distortion correction parameter. The reusability of the same infrared image distortion correction system is improved, and the infrared image distortion correction effect is ensured.

Description

technical field [0001] The invention belongs to the technical field of infrared imaging, and in particular relates to an FPGA-based real-time distortion correction method and system for infrared images. Background technique [0002] Infrared imaging technology realizes the tracking, detection and identification of targets by detecting the difference in infrared radiation intensity between the target and the environment. Due to the differences in the application places of infrared detection technology, different imaging lenses are required for infrared imaging. When considering the detection of close-range and large-field backgrounds, infrared wide-angle lenses are often used, and the resulting infrared images will be distorted. Poor, and: 1) Infrared imaging technology often uses hardware imaging systems in industrial applications, and complex distortion correction methods are difficult and slow to implement in hardware imaging systems, which is not conducive to real-time im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T1/20G06T1/60
CPCG06T1/20G06T1/60G06T2200/28G06T2207/10048G06T5/80G06T5/70Y02D10/00
Inventor 吕坚赵琳通马欣周云米冠宇万灿薛露
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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