Time domain and space domain combined infrared image real-time inter-frame noise reduction method and device

A combination of infrared images and technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of no real-time image smear, clear edge blur, large amount of calculation, etc., to achieve complete maintenance of image details, Effects with sharp edges and simple calculations

Pending Publication Date: 2021-06-04
THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spatial domain noise reduction method only considers the spatial correlation of pixels. Although the smoothing effect is good, it will blur the clear edges
Time-domain noise reduction methods, such as the popular 3D noise reduction algorithm and nlmeans algorithm, all use multi-frame image data calculation methods for noise reduction, but their computational complexity is large, there is no real-time performance, and image smear is obvious

Method used

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  • Time domain and space domain combined infrared image real-time inter-frame noise reduction method and device
  • Time domain and space domain combined infrared image real-time inter-frame noise reduction method and device
  • Time domain and space domain combined infrared image real-time inter-frame noise reduction method and device

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Embodiment 1

[0047] Infrared image real-time inter-frame noise reduction method based on time domain and space domain

[0048] Such as figure 1 As shown, the real-time frame-to-frame noise reduction method for infrared images that combines time domain and space domain includes the following steps:

[0049] Step 1: Receive the original infrared image data and perform preprocessing.

[0050] The raw infrared image data is preprocessed by the following method:

[0051] Step 1.1: process and replace obvious infrared image dead pixels;

[0052] Step 1.2: the infrared image is carried out preliminary denoising to eliminate obvious noise;

[0053] Step 1.3 stretches the infrared image.

[0054] Step 2: For the preprocessed infrared image data, use a filter algorithm based on edge determination to remove isolated noise points on the edge of the infrared image, and obtain the first noise-reduced infrared image data.

[0055] According to the information discontinuity between the noise point in...

Embodiment 2

[0082] Infrared image real-time inter-frame noise reduction device combining time domain and space domain

[0083] include:

[0084] an infrared image receiving unit, configured to receive original infrared image data;

[0085] The static image template initialization unit is used for preprocessing and denoising the original infrared image data to form an initialized static image template;

[0086] A static image template updating unit, configured to use continuous multiple frames of original infrared image data to mark dynamic pixels and static pixels of the infrared image data; update the static image template according to the marked dynamic pixels and static pixels;

[0087] The infrared image processing unit is used to process the original infrared image data of the current frame by using the updated static image template;

[0088] The display unit is used to display the infrared image processed by the infrared image processing unit.

[0089] The static image template i...

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Abstract

The invention relates to a time domain and space domain combined infrared image real-time inter-frame noise reduction method and device, and the method comprises the steps of receiving original infrared image data, and carrying out the preprocessing; for the preprocessed infrared image data, utilizing a filtering algorithm based on edge judgment to remove isolated noise points on the edge of the infrared image; suppressing noise on an infrared image spatial domain by using a spatial domain filtering method of retaining edge data; initializing a static image template based on the obtained infrared image data; marking dynamic pixel points and static pixel points of infrared image data by using continuous multi-frame original infrared image data; updating the static image template according to the marked dynamic pixel points and static pixel points; and processing the original infrared image data of the current frame by using the updated static image template. According to the invention, the infrared image can be processed in real time, and the problems of unclear edge and smear of the infrared image are effectively solved.

Description

technical field [0001] The invention relates to a real-time frame-to-frame noise reduction method and device for an infrared image combining time domain and space domain. Background technique [0002] During the imaging process of infrared thermal imaging cameras, due to the characteristics of its imaging components that are extremely susceptible to interference from external radiation energy, internal heat conduction noise, and low sensitivity, most of the acquired image data presents nonlinear, irregular jitter, and image noise points are obvious. Video is an image sequence composed of two-dimensional images on a one-dimensional time axis. The purpose of noise reduction is to improve the intuitive visual effect of images. Images that introduce noise will affect people's visual perception, especially for applications that require target recognition. . Traditional inter-frame noise reduction methods include temporal domain noise reduction methods and spatial domain noise re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T5/002G06T2207/10048
Inventor 魏兆超丁赫赖东林范光强吴金中
Owner THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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