Video SAR imaging inter-frame gray scale matching method
A grayscale matching and video technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problem of grayscale mismatch between video SAR imaging frames.
Active Publication Date: 2021-07-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] The purpose of the present invention is to aim at the problem of grayscale mismatch between video SAR imaging frames, provide a feature based on the average and stable scene echo energy, and complete a method for matching between video SAR imaging frames
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
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 stability characteristics of the echo energy of the video SAR in the imaging area, the present invention proposes a method for grayscale matching between frames of the video SAR imaging results: firstly, the influence of the points with high echo energy on the calculation of the effective energy later is eliminated, and in the follow-up In the process of multi-frame composite background, the influence of extreme points is reduced, and the influence of non-imaging background is eliminated, and the average imaging energy of SAR between video frames is calculated. Then the correction coefficient between frames of video SAR is obtained through the calculated average energy, and finally the gray level matching between frames of video SAR is completed through the correction ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of video SAR imaging result preprocessing, and particularly relates to a video SAR imaging inter-frame gray scale matching method. The invention provides a video SAR imaging result inter-frame gray scale matching method according to echo energy stability characteristics of a video SAR in an imaging area, and the method comprises the following steps of: firstly, eliminating the influence of a point with very high echo energy on subsequent effective energy calculation, reducing the influence of an extreme point in a subsequent multi-frame background synthesis process, eliminating the influence of a background formed by non-imaging, and calculating to obtain the average imaging energy of the SAR between the video frames; and then obtaining a correction coefficient between the video SAR frames through the calculated average energy, and finally completing gray scale matching between the video SAR frames through the correction coefficient. According to the method, the problem that in the video SAR imaging result, due to strong reflection points, gray scale mismatching is shown in a normalized image in video SAR imaging result synthesis is solved.
Description
technical field [0001] The invention belongs to the technical field of preprocessing of video SAR imaging results, in particular 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 all-weat...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(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