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A Method of Gray Scale Matching Between Frames of Video SAR Imaging

A grayscale matching and video technology, applied in image analysis, image enhancement, image data processing, etc., can solve problems such as grayscale mismatch between video SAR imaging frames

Active Publication Date: 2022-03-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of grayscale mismatch between video SAR imaging frames, provide a feature based on the average and stable echo energy of the scene, and complete a method for matching between video SAR imaging frames

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  • A Method of Gray Scale Matching Between Frames of Video SAR Imaging
  • A Method of Gray Scale Matching Between Frames of Video SAR Imaging
  • A Method of Gray Scale Matching Between Frames of Video SAR Imaging

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings and simulation examples to prove the practicability of the present invention.

[0039] According to the stable feature of the echo energy of the video SAR in the imaging area, the present invention proposes a method for gray matching between the frames of the video SAR imaging result: firstly, the influence of the points with high echo energy on the subsequent calculation of the effective energy is eliminated, and in the follow-up In the process of synthesizing the background of multiple frames, the influence of extreme points is reduced, and the influence of the background formed by non-imaging is eliminated, and the average imaging energy of SAR between video frames is calculated. Then, the correction coefficient between video SAR frames is obtained through the calculated average energy, and finally the grayscale matching between frames of video SAR is completed throug...

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Abstract

The invention belongs to the technical field of video SAR imaging result preprocessing, in particular to a method for gray level matching between video SAR imaging frames. According to the stable feature of the echo energy of the video SAR in the imaging area, the present invention proposes a method for gray level matching between the frames of the video SAR imaging results. In the process of synthesizing the background of multiple frames, the influence of extreme points is reduced, and the influence of the background formed by non-imaging is eliminated, and the imaging average energy of SAR between video frames is calculated. Then, the correction coefficient between video SAR frames is obtained through the calculated average energy, and finally the grayscale matching between frames of video SAR is completed through the correction coefficient. The invention solves the problem of grayscale mismatch in the normalized image in the synthesis of the video SAR imaging result due to strong reflection points in the video SAR imaging result.

Description

technical field [0001] The invention belongs to the technical field of video SAR imaging result preprocessing, and in particular relates to a method for grayscale matching between video SAR imaging frames. Background technique [0002] Since the 1950s, the RB-57D and RB-47A strategic reconnaissance aircraft were first loaded and used synthetic aperture radar (SAR). It has a relatively complete synthetic aperture radar system, which has a wide range of applications in the military and civilian fields and plays an important role. Synthetic aperture radar is a high-resolution imaging radar, which uses the trajectory generated by the line-to-line motion between the radar and the target to approximate a synthetic aperture instead of the real aperture of the array by using the transmitted linear frequency modulation signal, and uses the pulse compression of the target echo signal to achieve high resolution imaging. Synthetic aperture radar has the characteristics of all-day and ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G06K9/62G06T7/246
CPCG01S13/9021G06T7/248G06T2207/10016G06T2207/10044G06F18/22
Inventor 杨晓波李晋余正顺闵锐皮亦鸣崔宗勇曹宗杰
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA