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A method for identifying camouflaged targets based on polarization purity

A technology of camouflaging targets and purity, which is applied in special data processing applications, complex mathematical operations, geometric CAD, etc., and can solve problems such as inability to identify targets

Pending Publication Date: 2021-12-10
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, simply using the polarization information of reflected light cannot identify the target under camouflage in many cases.

Method used

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  • A method for identifying camouflaged targets based on polarization purity
  • A method for identifying camouflaged targets based on polarization purity
  • A method for identifying camouflaged targets based on polarization purity

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specific Embodiment approach

[0015] The present invention is based on the method for identifying a camouflage target based on polarization purity, and the specific implementation method is as follows:

[0016] Such as figure 1 Shown is a model diagram of object recognition with IPPs, with the target covered with paint. We are in the upper hemisphere at the angle of incidence Send signal light (in practice, it can be replaced by laser), trace the light, and finally get the IPPs of each grid in the upper hemisphere, and get different IPPs by changing the incident angle and the roughness of the paint, and finally for the same grid Compare P1, P2, P3 with P1, P2, P3 of different grids to identify the target.

[0017] (1) Rough surface modeling

[0018] For a rough surface, its height field obeys a Gaussian distribution, and the larger the variance, the rougher the surface. According to the microfacet theory, the rough surface can be regarded as a combination of smooth microfacets. Each microfacet is an i...

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Abstract

Disclosed is a method for identifying a camouflaged target based on the polarization purity, after the target is painted and camouflaged, the camouflaged target cannot be identified by using the degree of polarization AoP and the angle of polarization DoP, IPPs originates from decomposition of a target Mueller matrix, namely, the target can be decomposed into a linear combination of four pure components. the relative difference of the weights of the four pure components provides information of more dimensions for the target, and plays a significant role in recognition of the camouflage target, signal light is emitted at the zenith angle theta of the upper hemisphere of the target, and then the light is tracked until the light is received, so that the recognition accuracy of the camouflage target is improved. The upper hemisphere is equally divided into a plurality of grids according to the zenith angle and the azimuth angle during receiving, the disguised target is identified according to the IPPs among the grids, and multiple groups of IPPs data are obtained by changing the size of theta and the roughness of paint and are analyzed, so that the detection of the disguised target is realized, and the invention is used for target identification and detection. particularly, the invention has extraordinary significance on detection of a target under camouflage.

Description

technical field [0001] The invention belongs to the field of target identification and remote sensing, and in particular relates to a method for identifying camouflaged targets based on polarization purity. [0002] technical background [0003] Different reflection properties exhibited by different targets are widely used in many fields, such as detection and prediction of cancerous changes in biological tissues. In addition, the polarization information of reflected light, such as degree of polarization (DoP), angle of polarization (AoP), etc., can provide more additional information about the target. When light interacts with a target, the polarization of the incident light changes, and the reflected light carries information about the target. Therefore, the polarization distribution of the reflected light reveals the characteristics of the target surface, which can be used for target detection and identification. Since it is crucial to use reflected light to identify ta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/10G06F17/16
CPCG06F30/20G06F30/10G06F17/16
Inventor 郭忠义郭凯李德奎
Owner HEFEI UNIV OF TECH