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Multi-angle SAR image fusion method with local image index optimization

An image index and image fusion technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of reducing imaging overlapping and insufficient ability to detect blind areas, so as to achieve the unaffected imaging reconnaissance ability and eliminate adverse effects , the effect of overcoming adverse effects

Active Publication Date: 2017-06-30
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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Problems solved by technology

[0012] In order to solve the problem that the current 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 local image index optimization algorithm Multi-angle SAR image fusion method

Method used

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Embodiment 1

[0065] 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 with optimized local image index 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 optimized for the local image index of the present invention, which is implemented in the following steps:

[0066] Step 1: Determine the imaging plane, and use the time-domain fast back-projection algorithm to complete the ...

Embodiment 2

[0139] 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 invention provides a novel multi-angle SAR image fusion imaging algorithm being a multi-angle SAR image fusion method with local image index optimization. According to binary segmentation results of a layover zone and a non-layover zone of image pixels, paired crossed classification and fusion processing, like larger value taking, smaller value taking, and criterion interchanging, is carried out on a layover zone image and a non-layover zone image, thereby eliminating the adverse influence on SAR image fusion by layover and shadow phenomena effectively. Meanwhile, image quality evaluation is carried out on each image after fusion processing, a local image index of each image is calculated by using a sliding window by taking each pixel as center, and a final fusion processing result Iopt based on a local image index optimization criterion. Therefore, the image index of the fusion processing result Iopt can be guaranteed not only to be optimal globally but also to be optimal in a neighbor region by using any pixel as center.

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 with optimized local image index. 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 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/50G06T7/11G06T7/136
CPCG06T5/50G06T2207/10044G06T2207/20221G06T2207/30168G06T2207/30181
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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