Image generating device setting virtual transmitters and receivers, and method of operating the same

Patent metadata

Field	Value
Publication number	US-12566259-B2
Application number	US-202318480795-A
Country	US
Kind code	B2
Filing date	Oct 4, 2023
Priority date	Oct 12, 2022
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

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.

First claim

What is claimed is:

1 . An image generating device comprising:
a measurement device including a plurality of transmitters and a plurality of receivers for a multistatic measurement of an object; an image preprocessing device configured to receive a raw image signal corresponding to the multistatic measurement from the measurement device, and to generate a preprocessed image signal based on the raw image signal; an image amplifier configured to generate an amplified image signal based on the preprocessed image signal; and an image restorer configured to generate a restored image signal corresponding to the object based on the amplified image signal, and wherein the image amplifier is further configured to: set up a first virtual transmitter and a first virtual receiver; 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 from the preprocessed image signal; generate first virtual measurement data of the first virtual transmitter and the first virtual receiver based on a first operation of the first measurement data and first correction data; and generate the amplified image signal based on a synthesis of the preprocessed image signal and the first virtual measurement data.

2 . The image generating device of claim 1 , wherein the image amplifier is further configured to:
set up a second virtual transmitter and a second virtual receiver; obtain second measurement data of a second target transmitter closest to the second virtual transmitter among the plurality of transmitters and a second target receiver closest to the second virtual receiver among the plurality of receivers from the preprocessed image signal; generate second virtual measurement data of the second virtual transmitters and the second virtual receiver based on a second operation of the second measurement data and second correction data; and generate the amplified image signal based on a synthesis of the preprocessed image signal, the first virtual measurement data, and the second virtual measurement data.

3 . The image generating device of claim 1 , wherein the image amplifier is further configured to:
generate first distance data based on distances between a target point within the object and each of the first target transmitter and receiver; generate second distance data based on distances between the target point within the object and each of the first virtual transmitter and receiver; generate the first correction data based on a comparison operation of the first distance data and the second distance data; and generate the first virtual measurement data based on a product of the first measurement data and the first correction data, and wherein the first distance data includes a first transmitter distance indicating a distance between the first target transmitter and the target point, and a first receiver distance indicating a distance between the first target receiver and the target point, and wherein the second distance data includes a second transmitter distance indicating a distance between the first virtual transmitter and the target point, and a second receiver distance indicating a distance between the first virtual receiver and the target point.

4 . The image generating device of claim 3 , wherein the target point within the object is a center of a cross section of the object corresponding to a target height.

5 . The image generating device of claim 3 , wherein the image amplifier is further configured to:
generate the first correction data based on equation

e

-

ikL
VT

×

e

-

ikL
VR

e

-

ikL
T

×

e

-

ikL
R

,

and where L T indicates the first transmitter distance, L R indicates the first receiver distance, L VT indicates the second transmitter distance, and L VR indicates the second receiver distance.

6 . The image generating device of claim 1 , wherein the measurement device is further configured to generate the raw image signal using a signal of a terahertz wave.

7 . The image generating device of claim 6 , wherein the plurality of transmitters are arranged at intervals of ¼ λ to 1 λ , the plurality of receivers are arranged at intervals of ¼ λ to 1 λ , and the λ is a wavelength of the terahertz wave.

8 . The image generating device of claim 1 , wherein the image preprocessing device is further configured to remove noise from the raw image signal or to realign the raw image signal.

9 . The image generating device of claim 1 , wherein the restored image signal is a 3D (3-dimensional) image signal.

10 . A method of operating an image generating device including a measurement device, an image preprocessing device, an image amplifier, and an image restorer, the method comprising:
generating, by the measurement device, a raw image signal corresponding to a multistatic measurement of an object; generating, by the image preprocessing device, a preprocessed image signal based on the raw image signal; setting up, by the image amplifier, a first virtual transmitter and a first virtual receiver; obtaining, by the image amplifier, first measurement data of a first target transmitter closest to the first virtual transmitter among a plurality of transmitters of the measurement device and a first target receiver closest to the first virtual receiver among a plurality of receivers of the measurement device from the preprocessed image signal; generating, by the image amplifier, first virtual measurement data of the first virtual transmitter and the first virtual receiver based on a first operation of the first measurement data and first correction data; generating, by the image amplifier, an amplified image signal based on a synthesis of the preprocessed image signal and the first virtual measurement data; and generating, by the image restorer, a restored image signal corresponding to the object based on the amplified image signal.

11 . The method of claim 10 , wherein the setting up, by the image amplifier, of the first virtual transmitter and the first virtual receiver further includes setting up a second virtual transmitter and the second virtual receiver,
wherein the obtaining, by the image amplifier, of the first measurement data of the first target transmitter closest to the first virtual transmitter among the plurality of transmitters of the measurement device and the first target receiver closest to the first virtual receiver among

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Jo Sungwoo
• Kim Mugeon
• Kim Jungsoo
• Park Kyung Hyun
• Lee Il Min
• Lee Eui Su
• Choi Da Hye

Classifications

• G01S13/08

  Systems for measuring distance only (indirect measurement G01S13/46) · CPC title

• G06T5/50

  using two or more images, e.g. averaging or subtraction · CPC title

• G06V10/20

  Image preprocessing · CPC title

• G01S13/89 Primary

  for mapping or imaging · CPC title

• G06T7/593 Primary

  from stereo images · CPC title