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Adaptive mapping algorithm and device for keeping infrared image target and background not suppressed

An infrared image, adaptive technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problem of overall image flicker, difficulty, noise amplification in local areas, etc., to suppress flicker, smooth edge areas, and suppress noise. produced effect

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

AI Technical Summary

Problems solved by technology

However, the algorithm itself also has some problems, such as flickering of the image as a whole, noise amplification in local areas, etc.
Most of the enhancement algorithms based on linear transformation are simple in calculation and high in real-time performance, but it is difficult to guarantee the obvious contrast between the image background and the target

Method used

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  • Adaptive mapping algorithm and device for keeping infrared image target and background not suppressed
  • Adaptive mapping algorithm and device for keeping infrared image target and background not suppressed
  • Adaptive mapping algorithm and device for keeping infrared image target and background not suppressed

Examples

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Effect test

Embodiment 1

[0052] Adaptive Mapping Algorithm to Keep Infrared Image Target and Background Unsuppressed

[0053] Such as figure 1 As shown, the adaptive mapping algorithm to keep the infrared image target and background unsuppressed includes the following steps:

[0054] Step 1: Preprocessing the infrared original image data to obtain the first infrared image.

[0055] Step 2: Carry out block processing on the first infrared image, divide it into multiple image areas, and count the histogram information of each image area; calculate the cumulative histogram minimum gray value Pix of each image area min and the maximum gray value Pix max .

[0056] The first infrared image is divided into 4-8 image areas, and the area of ​​each image area is the same. In this embodiment, the first infrared image is divided into four image areas.

[0057] Calculate the cumulative histogram minimum gray value Pix of each image area by the following method min and the maximum gray value Pix max .

[0...

Embodiment 2

[0077] A device for keeping infrared image targets and backgrounds from being suppressed

[0078] include:

[0079] An image preprocessing unit, configured to preprocess infrared raw image data to obtain a first infrared image;

[0080] an image processing unit for:

[0081] The first infrared image is divided into blocks, divided into multiple image areas, and the histogram information of each image area is counted; the cumulative histogram minimum gray value Pix of each image area is calculated min and the maximum gray value Pix max ;

[0082] Based on the minimum gray value Pix min and the maximum gray value Pix max , modify the cumulative histogram of each image area;

[0083] Calculate the minimum gray value out of the extreme value range of each image area map min and the maximum gray value out max ; Based on the minimum gray value out min and the maximum gray value out max , establishing the mapping relationship between the output and input of each image area ...

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Abstract

The invention relates to an adaptive mapping algorithm and device for keeping an infrared image target and background not suppressed, and the method comprises the steps of carrying out the preprocessing of original infrared image data, and obtaining a first infrared image; performing block processing on the first infrared image, segmenting the first infrared image into a plurality of image areas, and performing statistics on histogram information of each image area; calculating the minimum gray value and the maximum gray value of the accumulated histogram of each image area, and correcting the accumulated histogram of each image area; calculating a minimum gray value and a maximum gray value of an extreme value range mapped by each image region, establishing a mapping relation of output and input of each image region, and obtaining a second infrared image; and for each block image region of the second infrared image, obtaining a third infrared image through an image adjacent region edge fusion recombination method. According to the invention, the contrast between the target image background and the target can be ensured, and image area flicker and background noise can be effectively inhibited.

Description

technical field [0001] The invention relates to an adaptive mapping algorithm and a device for keeping infrared image targets and backgrounds from being suppressed. Background technique [0002] In the field of infrared image processing, after infrared image processing, it is compatible to obtain clear and clean infrared images in multiple scenarios, which has a wide range of application requirements. Due to the inherent characteristics of the infrared detector itself, when the radiation contrast of the target in the visible field is relatively extreme, how to generate a clear target, keep the image background observable, and image noise-free amplification has always been an urgent problem in the field of infrared image processing. question. In order to improve the quality of infrared image processing, algorithms such as CLAHE, AHE, AGC, and piecewise linear stretching are commonly used. These algorithms can expand the dynamic range and improve the contrast to a certain ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/40G06T5/50G06T7/00G06T7/11G06T7/136
CPCG06T5/40G06T5/50G06T7/0002G06T7/11G06T7/136G06T2207/10048G06T2207/20021G06T2207/20221G06T5/00
Inventor 魏兆超赖东林丁赫范光强吴金中
Owner THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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