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Three-dimensional InISAR image registration and fusion method based on mutual information

A technology of image registration and fusion method, which is applied in the direction of reflection/re-radiation of radio waves, utilization of re-radiation, measurement devices, etc., which can solve the problems of InISAR imaging and data fusion, and single target information.

Inactive Publication Date: 2015-04-22
XI'AN POLYTECHNIC UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a 3DInISAR image registration and fusion method based on mutual information, which solves the problem that the target information provided when using monostatic radar imaging is relatively single and the InISAR imaging and data fusion under multi-static radar observation are difficult

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  • Three-dimensional InISAR image registration and fusion method based on mutual information

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[0067] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0068] figure 1 It is the 3D InISAR imaging system diagram based on mutual information of the present invention; in the system, select the 3D InISAR image of a certain aircraft under different viewing angles as the reference image and the image to be registered, and set the baseline length D as 1m, then the antenna O, A 1 、A 2 The coordinates of the antenna are (0,0,0), (1,0,0) and (0,0,1), and the coordinates of the antenna O' are (100,100,100), then the antenna A' 1 , A' 2 , the coordinates are (101, 100, 100) and (100, 100, 101) respectively, and the distance from the radar to the target is about 20Km. The simulated surface consists of 330 point targets, the speed along the x-axis is about 100m / s, the radar operates at the X-band 1.0GHz, and transmits an FM waveform with a bandwidth of 400MHz, the distance resolution is 0.375, and the c...

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Abstract

The invention discloses a three-dimensional InISAR image registration and fusion method based on mutual information. The 3DInISAR image registration and fusion method based on the mutual information comprises the following steps of obtaining the three-dimensional state of a target image, and registering the image, arbitrarily selecting a multistatic radar to observe two three-dimensiional InISAR images of different positions in a three-dimensional InISAR imaging system, obtaining the distribution state of each point of the images in three-dimensional space, and using the registration method based on the mutual information to obtain a three-dimensional registration figure. The three-dimensional InISAR image registration and fusion method based on mutual information uses the registration method based on the mutual information, effective fusion to ISAR data obtained by the radars is carried out, and the detection performance and identification probability of the radars to a target are improved. The three-dimensional InISAR image registration and fusion method based on the mutual information has wide application value in the aspects of battlefield perception, target identification and air traffic control and the like.

Description

technical field [0001] The invention belongs to the technical field of radar imaging and relates to a mutual information-based 3DInISAR image registration and fusion method. Background technique [0002] Microwave imaging radar has the ability to provide high-resolution images all-day, all-weather, and long-distance. It has received more and more attention and applications in military and civilian fields. Inverse synthetic aperture radar (ISAR) is one of the key research directions in the field of radar imaging at home and abroad. The current ISAR imaging is mostly based on monostatic radar. Monostatic radar ISAR imaging usually uses the inversion of the observation signal of the target to obtain the two-dimensional distribution of the target scattering center. Since the target is often non-cooperative and mobile, it cannot be determined The real position of the target scattering point in three-dimensional space, even if a high-resolution target image is obtained by using ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S13/003G01S13/9023G01S13/9029G01S13/9064G01S13/9058
Inventor 张龙贺小慧牛源蓁
Owner XI'AN POLYTECHNIC UNIVERSITY
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