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A Multi-angle SAR Image Fusion Method Based on Visibility Classification

An image fusion, multi-angle technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of reducing imaging overlap and insufficient detection of blind spots, to improve readability and intelligibility, algorithm Ease of use and high classification accuracy

Active Publication Date: 2019-10-29
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problem that the above-mentioned multi-angle SAR fusion imaging algorithm is insufficient in reducing imaging overlapping and detecting blind areas, the present invention provides a brand-new multi-angle SAR image fusion imaging algorithm—a multi-angle SAR image based on visibility classification fusion method

Method used

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  • A Multi-angle SAR Image Fusion Method Based on Visibility Classification
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  • A Multi-angle SAR Image Fusion Method Based on Visibility Classification

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Embodiment 1

[0064] Embodiment 1: Single-platform SAR multi-view fusion imaging detection. A single platform carrying a SAR payload follows a designed curved flight path and performs imaging detection around the target area of ​​interest. Due to the drastic change of target scattering characteristics and imaging space geometry with the observation angle, full-aperture coherent accumulation processing cannot achieve optimal imaging detection effect, and multi-view SAR fusion imaging processing must be considered. The multi-angle SAR image fusion method based on visibility classification of the present invention can be used to solve the fusion imaging processing problem at this time. Such as figure 1 As shown, it is a flow chart of the multi-angle SAR image fusion method based on visibility classification in the present invention, and the specific steps are:

[0065] Step 1: Determine the imaging plane, and use the time-domain fast back-projection algorithm to complete the coherent accumul...

Embodiment 2

[0118] Embodiment 2: Multi-platform SAR simultaneous multi-view fusion imaging detection. Multiple detection platforms carrying SAR payloads simultaneously implement cooperative imaging detection on the target area of ​​interest along the designed flight path. Since the spatial geometric relationship between each imaging platform and the target is completely different, the scattering characteristics of the target corresponding to the imaging detection of each platform are different, and the image features and phenomena such as overlapping and shadowing of the image are also different. The coherent accumulation of imaging results from different viewing angles makes it difficult to obtain the optimal imaging detection effect. At this time, multi-view SAR fusion imaging processing must be considered to realize the fusion of imaging detection results from different imaging platforms and different viewing angles, and improve the high-quality imaging reconnaissance of the target are...

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Abstract

The present invention provides a new multi-angle SAR image fusion imaging algorithm - a multi-angle SAR image fusion method based on visibility classification. This invention calculates the non-overlapping area pixels I of the image from each angle of view based on the binary segmentation results of the overlapping area and the non-overlapping area of ​​the image pixels. non_overlap The multi-view visibility L I , automatically realizes fine classification of image pixels through visibility indicators; in addition, the present invention distinguishes the contribution of observation results from different viewing angles to image pixels, and only uses contributing angles for fusion, avoiding the shortcomings of simple fusion methods that cannot obtain optimal fusion results. ; At the same time, the present invention has a simple principle, good fusion quality, simple visibility index calculation, high classification accuracy, and simple engineering implementation of the fusion algorithm.

Description

technical field [0001] The invention belongs to the field of imaging radar detection and at the same time belongs to the field of image fusion processing, in particular to a multi-angle SAR image fusion method based on visibility classification. Background technique [0002] As an active microwave sensor, Synthetic Aperture Radar (SAR) makes full use of pulse compression technology, synthetic aperture principle and signal coherent processing method, and can obtain two-dimensional high-resolution in range and azimuth with real small aperture antenna. The radar image can realize all-day and all-weather target observation, obtain target information through the surface and vegetation, track and measure the scattering characteristics of the target, and realize imaging recognition of maneuvering targets. These characteristics make it a major tool for modern military reconnaissance. The high-resolution radar images it acquires greatly promote the informatization process of military...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/50G06T5/00G06T7/41G06T7/11
CPCG06T5/50G06T2207/20221G06T5/70
Inventor 尹灿斌冉达劳国超
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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