A high-resolution imaging method for 3D targets based on terahertz aperture coding imaging

Abstract

The invention provides a three-dimensional target high resolution imaging method based on Terahertz aperture coded imaging. The whole three-dimensional imaging area is uniformly divided into several three-dimensional imaging units firstly; as for each three-dimensional imaging unit, first-layer resolution target information reconstruction and extraction, second-layer resolution target informationreconstruction and extraction and so on until lth resolution target information reconstruction and extraction are carried out; and l layers of high resolution target information reconstruction and extraction results of each three-dimensional imaging unit are joined and integrated to obtain a high resolution imaging result of the whole three-dimensional target. The problem of a huge reference signal matrix scale in the three-dimensional target high resolution imaging in the Terahertz-band aperture coding can be solved. A multilayer resolution reconstruction mode is adopted, a high resolution three-dimensional target can be reconstructed accurately and gradually, the reference signal matrix scale can be effectively reduced, and the computer operation efficiency and the imaging speed are improved.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional target block scanning, in particular to a three-dimensional target high-resolution imaging method based on terahertz aperture coding imaging. Background technique [0002] With the development of society, radar high-resolution imaging plays an increasingly important role in ensuring national strategic security and promoting national economic development. Optical radar can perform forward-looking imaging with short wavelength, high resolution and fast imaging speed, but it relies on target radiation, has poor penetration ability to smoke, dust, fog and obstacles, and is easily affected by environmental factors. Microwave radar can actively detect and has strong penetrating ability. However, due to the low microwave frequency, long wavelength, and low angular resolution, and due to the limitation of the imaging principle, imaging accumulation time is required, and high frame rate and high ...

AI Technical Summary

Problems solved by technology

Obviously, it is impossible for ordinary computers to complete the above calculations. Therefore, a method that can reduce the size of the reference signal matrix to an appropriate size under high-resolution imaging is needed to reduce the difficulty of calculation and improve the calculation efficiency.

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