WO-2026091980-A1 - SINGLE-PIXEL IMAGING METHOD FOR OBJECT RETRACING MOTION TRAJECTORY, SYSTEM, MEDIUM, AND DEVICE

WO2026091980A1WO 2026091980 A1WO2026091980 A1WO 2026091980A1WO-2026091980-A1

Abstract

A single-pixel imaging method for an object retracing a motion trajectory, a system, a medium, and a device. The method comprises: a controller generating, according to a predefined formed-image reconstruction algorithm, a modulation pattern sequence having different spatial distributions, and inputting the modulation pattern sequence into a light modulation apparatus (S1); the light modulation apparatus receiving a trajectory pulse signal from a digital signal processor, and simultaneously sending a modulated pulse signal to a synchronous multi-channel signal acquisition apparatus (S2); the synchronous multi-channel signal acquisition apparatus receiving the modulated pulse signal, and being triggered to acquire, at a predetermined sampling frequency, a plurality of sample values of a sampled light signal illuminating an object to be imaged and detected by a first detector (S3); the controller selecting a target sample value from among the sample values as a formed-image reconstruction sample value, the formed-image reconstruction sample value corresponding to a target modulation pattern in the modulation pattern sequence (S4); repeating the above steps until each formed-image reconstruction sample value corresponds to each modulation pattern in the modulation pattern sequence on a one-to-one basis, and generating a formed-image reconstruction sample value sequence on the basis of each formed-image reconstruction sample value (S5); on the basis of the formed-image reconstruction algorithm, the controller performing image reconstruction on the formed-image reconstruction sample value sequence to generate a single formed image of the object to be imaged (S6); and repeating the above steps until a count of generated single formed images reaches a predetermined number (S7). The imaging system is capable of imaging, over an extended period of time, high-speed objects retracing a motion trajectory at varying velocity.

Inventors

ZHONG, Jingang
ZHANG, Zibang
LONG, Sicheng
YAO, Manhong

Assignees

暨南大学

Dates

Publication Date: 20260507
Application Date: 20250923
Priority Date: 20241104

Claims (9)

A single-pixel imaging method for repeating object motion trajectories, characterized in that it is applied to an object imaging system, the object imaging system comprising a motion trajectory detection device and a structured imaging device, the structured imaging device comprising a light modulation device, a first detector or illumination source, a multi-channel signal synchronous acquisition device, and a controller, the motion trajectory detection device comprising a detection source, a second detector, and a digital signal processor, the method comprising: S1, the controller generates a modulation pattern sequence with different spatial distributions according to a preset imaging image reconstruction algorithm, and inputs the modulation pattern sequence to the optical modulation device; S2, the optical modulation device receives the trajectory pulse signal from the digital signal processor and simultaneously sends the modulation pulse signal to the multi-channel signal synchronous acquisition device. The trajectory pulse signal is generated by the motion trajectory detection device based on the target features of the object to be imaged, and the modulation pulse signal is generated by the optical modulation device based on the trajectory pulse signal. S3, the multi-channel signal synchronous acquisition device receives the modulation pulse signal and is triggered to acquire multiple sample values of the light sampling signal illuminating the object to be imaged detected by the first detector at a preset sampling frequency. Each sample value is obtained by the light modulation device modulating the light of the object to be imaged based on the target modulation pattern in the modulation pattern sequence. S4, the controller selects a target sampling value from each of the sampling values as an imaging image reconstruction sampling value, and the imaging image reconstruction sampling value corresponds to the target modulation pattern in the modulation pattern sequence; S5, repeat steps S2-S4 above until each of the imaging image reconstruction sample values corresponds one-to-one with each modulation pattern in the modulation pattern sequence, and generate an imaging image reconstruction sample value sequence based on each of the imaging image reconstruction sample values; S6, the controller performs image reconstruction on the imaging image reconstruction sampling value sequence based on the imaging image reconstruction algorithm to generate a single imaging image of the object to be imaged; S7. Repeat steps S2-S6 until the number of generated images reaches the preset number.
The single-pixel imaging method for repeating object motion trajectories according to claim 1 is characterized in that the trajectory pulse signal can be obtained by the following method: The detection light source emits a light beam toward the object to be imaged, and the light beam sequentially sweeps across the feature regions corresponding to each of the target features of the object to be imaged; The second detector sequentially detects the light signal of the beam as it scans each of the feature regions, generates a light signal sequence of the object to be imaged, and converts the light signal sequence into an analog electrical signal; The digital signal processor converts the analog electrical signal into a digital signal, counts digital pulses according to the number of target features of the object to be imaged, sets the count value to 0 after obtaining the count information, and generates a trajectory pulse signal based on the count information. The object to be imaged is an object with a repeating motion trajectory. The light beam can sequentially scan each of the feature areas as the object to be imaged completes one or more complete motion trajectories. The trajectory pulse signal corresponds to the time required for the object to be imaged to complete one or more complete motion trajectories.
The single-pixel imaging method for repeating object motion trajectories according to claim 2 is characterized in that the single or multiple complete motion trajectories can be obtained by the following method: During the repeated trajectory movement of the object to be imaged, the first moment when the current trajectory pulse signal is generated after the beam has sequentially swept each of the feature regions is recorded. Obtain the second moment corresponding to the next trajectory pulse signal generated after the first moment; The motion trajectory of the object to be imaged between the first time and the second time is taken as the single or multiple complete motion trajectory.
The single-pixel imaging method for repeating object motion trajectories according to claim 1 is characterized in that the structured imaging device is a structured illumination imaging device; the structured illumination imaging device includes a light modulation device, a first detector, a multi-channel signal synchronous acquisition device, and a controller, wherein the light modulation device includes an illumination source, an illumination coupling prism, a spatial light modulator, and a projection lens group; the multiple sampled values can be obtained in the following manner: The light emitted by the illumination source passes sequentially through the illumination coupling prism, the spatial light modulator, the projection lens group, and the object to be imaged before reaching the first detector, so that the first detector continuously outputs light sampling signals; wherein, after receiving the trajectory pulse signal, the spatial light modulator displays the target modulation pattern in the modulation pattern sequence, so that the light emitted by the illumination source can be modulated according to the target modulation pattern when passing through the spatial light modulator. After receiving the trajectory pulse signal from the digital signal processor, the optical modulation device modulates the signal according to the target modulation pattern and simultaneously sends the modulation pulse signal to the multi-channel signal synchronous acquisition device. Based on the modulation pulse signal, the multi-channel signal synchronous acquisition device is triggered to acquire multiple sampled values by continuously outputting optical sampling signals from the first detector at the preset sampling frequency.
The single-pixel imaging method for repeating object motion trajectories according to claim 1 is characterized in that the structured imaging device is a structured detection imaging device, which includes a light modulation device, an illumination source, a multi-channel signal synchronous acquisition device, and a controller; the light modulation device includes an imaging lens group, a detection coupling prism, a first detector, and a spatial light modulator; the multiple sampled values can be obtained in the following manner: The light emitted by the illumination source passes sequentially through the object to be imaged, the imaging lens group, the spatial light modulator, and the detection coupling prism before reaching the first detector, so that the first detector continuously outputs light sampling signals; wherein, after receiving the trajectory pulse signal, the spatial light modulator displays the target modulation pattern in the modulation pattern sequence, so that the light emitted by the illumination source can be modulated according to the target modulation pattern when passing through the spatial light modulator. After receiving the trajectory pulse signal from the digital signal processor, the optical modulation device modulates the signal according to the target modulation pattern and sends the modulation pulse signal to the multi-channel signal synchronous acquisition device. The multi-channel signal synchronous acquisition device is triggered by the modulation pulse signal to acquire multiple sampled values by continuously outputting optical sampling signals from the first detector at the preset sampling frequency.
The single-pixel imaging method for repeating the motion trajectory of an object according to claim 1 is characterized in that the preset imaging image reconstruction algorithm is one of the following: Fourier single-pixel imaging image reconstruction algorithm, Hadamard single-pixel imaging image reconstruction algorithm, computational ghost imaging image reconstruction algorithm, compressed sensing single-pixel imaging image reconstruction algorithm, and deep learning single-pixel imaging image reconstruction algorithm.
An object imaging system, characterized in that the object imaging system includes a motion trajectory detection device and a structured imaging device, the structured imaging device including a light modulation device, a first detector or illumination source, a multi-channel signal synchronous acquisition device and a controller, and the motion trajectory detection device including a detection source, a second detector and a digital signal processor; The motion trajectory detection device is used to acquire the target features of the object to be imaged, generate a trajectory pulse signal based on the target features of the object to be imaged, and send the trajectory pulse signal to the optical modulation device. The light modulation device is used to emit modulated light toward the object to be imaged or to modulate light from the object to be imaged, and to send a modulation pulse signal to the multi-channel signal synchronous acquisition device, wherein the modulation pulse signal is generated based on the trajectory pulse signal; The multi-channel signal synchronous acquisition device is used to receive the modulation pulse signal and acquire multiple sampled values of the light sampling signal illuminating the object to be imaged detected by the first detector at a preset sampling frequency, and send each of the sampled values to the controller. The first detector is used to detect the light signal illuminating the object to be imaged; The illumination source is used to emit a light beam toward the object to be imaged, so that the light beam illuminates the object to be imaged. The controller is configured to generate a modulation pattern sequence with different spatial distributions according to a preset imaging image reconstruction algorithm, and input the modulation pattern sequence to the optical modulation device; receive multiple sampling values of the light sampling signal illuminating the object to be imaged detected by the multi-channel signal synchronous acquisition device from the first detector at a preset sampling frequency, select a target sampling value from each of the sampling values as the imaging image reconstruction sampling value, repeat the above steps until each of the imaging image reconstruction sampling values corresponds one-to-one with each modulation pattern in the modulation pattern sequence, generate an imaging image reconstruction sampling value sequence based on each of the imaging image reconstruction sampling values, perform image reconstruction on each of the imaging image reconstruction sampling values in the imaging image reconstruction sampling value sequence based on the imaging image reconstruction algorithm, generate a single imaging image of the object to be imaged, and repeat the above steps until the number of imaging images of the object to be imaged reaches a preset number.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores at least one piece of program code, the at least one piece of program code being loaded and executed by a processor to perform the operation performed by the method as described in any one of claims 1 to 6.
An electronic device, characterized in that the electronic device includes one or more processors and one or more memories, wherein the one or more memories store at least one piece of program code, the at least one piece of program code being loaded and executed by the one or more processors to perform the operation performed by the method as described in any one of claims 1 to 6.

Description

Methods, systems, media, and devices for single-pixel imaging of repeating object motion trajectories Technical Field This application relates to the field of object imaging technology, and in particular to a single-pixel imaging method, system, medium, and device for repetitive object motion trajectories. Background Technology Many moving objects exhibit repetitive motion trajectories, such as circular motion objects like engines, electric motors, and fans, as well as reciprocating motion objects like telescopic push rods, pendulums, and spring oscillators. Currently, imaging of high-speed moving objects with repetitive trajectories primarily relies on traditional high-speed cameras. However, traditional high-speed camera imaging methods have limitations, including short continuous shooting times, high lighting requirements, and high equipment costs. Summary of the Invention This application provides a single-pixel imaging method, system, medium, and device for repeating the motion trajectory of an object. Compared with traditional high-speed camera imaging methods, it can improve continuous shooting time, reduce lighting brightness, and reduce equipment costs. Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application. According to one aspect of the embodiments of this application, a single-pixel imaging method for repeating object motion trajectories is provided. The method is applied to an object imaging system, which includes a motion trajectory detection device and a structured imaging device. The structured imaging device includes a light modulation device, a first detector or illumination source, a multi-channel signal synchronous acquisition device, and a controller. The motion trajectory detection device includes a detection source, a second detector, and a digital signal processor. The method includes: S1, the controller generates a modulation pattern sequence with different spatial distributions according to a preset imaging image reconstruction algorithm, and inputs the modulation pattern sequence to the optical modulation device; S2, the optical modulation device receives the trajectory pulse signal from the digital signal processor and simultaneously sends the modulation pulse signal to the multi-channel signal synchronous acquisition device. The trajectory pulse signal is generated by the motion trajectory detection device based on the target features of the object to be imaged, and the modulation pulse signal is generated by the optical modulation device based on the trajectory pulse signal. S3, the multi-channel signal synchronous acquisition device receives the modulation pulse signal and is triggered to acquire multiple sample values of the light sampling signal illuminating the object to be imaged detected by the first detector at a preset sampling frequency. Each sample value is obtained by the light modulation device modulating the light of the object to be imaged based on the target modulation pattern in the modulation pattern sequence. S4, the controller selects a target sampling value from each of the sampling values as an imaging image reconstruction sampling value, and the imaging image reconstruction sampling value corresponds to the target modulation pattern in the modulation pattern sequence; S5, repeat steps S2-S4 above until each of the imaging image reconstruction sample values corresponds one-to-one with each modulation pattern in the modulation pattern sequence, and generate an imaging image reconstruction sample value sequence based on each of the imaging image reconstruction sample values; S6, the controller performs image reconstruction on the imaging image reconstruction sampling value sequence based on the imaging image reconstruction algorithm to generate a single imaging image of the object to be imaged; S7. Repeat steps S2-S6 until the number of generated images reaches the preset number. In one embodiment of this application, based on the foregoing scheme, the trajectory pulse signal can be obtained by the following method: the detection light source emits a light beam toward the object to be imaged, and the light beam sequentially sweeps through the feature regions corresponding to each of the target features of the object to be imaged; The second detector sequentially detects the light signal of the beam as it scans each of the feature regions, generates a light signal sequence of the object to be imaged, and converts the light signal sequence into an analog electrical signal; The digital signal processor converts the analog electrical signal into a digital signal, counts digital pulses according to the number of target features of the object to be imaged, sets the count value to 0 after obtaining the count information, and generates a trajectory pulse signal based on the count information. The object to be imaged is an object with a repeating motion