Virtual Transmitter Imaging to Reduce Noise and Ghosting
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Solution Overview
Problem
The multistatic measurement method in security systems faces challenges with noise and ghosting due to insufficient information when transmitters and receivers are arranged at wide intervals, and increased production costs when arranged at narrow intervals.
Innovation Solution
An image generating device that sets up virtual transmitters and receivers to generate corrected virtual measurement data, using terahertz waves, and applies correction data based on distance comparisons to synthesize amplified image signals, reducing noise and ghosting while maintaining or reducing the number of physical transmitters and receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If transmitters and receivers are arranged at wide intervals, then production cost is reduced, but noise and ghosting occur in the restored image due to insufficient information
Solution Approach 1:
The patent creates virtual transmitters and receivers by copying the measurement data from physical transmitters and receivers. The virtual transmitters/receivers are positioned at locations where physical devices would be needed but are not actually installed, allowing the system to achieve high-resolution imaging with fewer physical components. This copying approach resolves the contradiction by providing the necessary measurement information without requiring additional physical hardware.
Solution Approach 2:
The patent introduces virtual transmitters and receivers as intermediary elements between the physical transmitters/receivers and the final image reconstruction process. These virtual elements mediate the information flow by synthesizing additional measurement data from existing physical device measurements, enabling high-quality imaging without increasing the number of physical transmitters and receivers.
2Measurement precision
If transmitters and receivers are arranged at narrow intervals, then image quality is improved, but the number of required transmitters and receivers increases resulting in increased production cost
Solution Approach 1:
Instead of installing additional physical transmitters and receivers at narrow intervals, the patent creates virtual copies of measurement data from existing physical devices. The virtual transmitters and receivers synthesize the measurement information that would be obtained from densely spaced physical devices, achieving high image quality without the associated production costs.
Solution Approach 2:
The patent replaces the mechanical approach of installing more physical transmitters and receivers with a computational approach using virtual transmitters and receivers. Instead of physically deploying additional devices to improve image quality, the system uses signal processing and data synthesis to create virtual measurement points, substituting mechanical deployment with computational methods.
3Ease of manufacture
If fewer physical transmitters and receivers are used, then production cost is reduced, but information insufficiency causes noise and ghosting in the restored image
Solution Approach 1:
The patent compensates for information loss from using fewer physical transmitters and receivers by creating virtual copies of measurement data. The virtual transmitters and receivers generate additional measurement information through data synthesis and processing, ensuring that sufficient information is available for high-quality image reconstruction without requiring more physical devices.
Solution Approach 2:
The patent performs preliminary processing of measurement data from physical transmitters and receivers to create virtual measurement data before final image reconstruction. By pre-synthesizing the virtual transmitter and receiver measurements from the physical device data, the system ensures that all necessary information is prepared in advance, preventing information insufficiency during the reconstruction process.
Data Source
AI summary
Disclosed is an image generating device, which includes a measurement device including a plurality of transmitters and a plurality of receivers for a multistatic measurement of an object, an image preprocessing device that receives a raw image signal corresponding to the multistatic measurement from the measurement device and generates a preprocessed image signal based on the raw image signal, an image amplifier that generates an amplified image signal based on the preprocessed image signal, and an image restorer that generates a restored image signal corresponding to the object based on the amplified image signal, and the image amplifier is further configured to set up a first virtual transmitter and a first virtual receiver, to obtain first measurement data of a first target transmitter closest to the first virtual transmitter among the plurality of transmitters and a first target receiver closest to the first virtual receiver among the plurality of receivers.