KR20220037939A - 3d imaging device with digital micromirror device and operating method thereof - Google Patents

Abstract

The present invention relates to a 3D imaging device with a digital micromirror device (DMD). The 3D imaging device comprises: a light emitting unit for irradiating modulated light of a predetermined wavelength, and including a vertical-cavity surface-emitting laser (VCSEL); the DMD which has a 2D array structure that includes a plurality of horizontal cells and a plurality of vertical cells, enables individual addressing of each cell, and reflects the laser light irradiated from the light emitting unit according to a preset sequence; a photodetector for detecting in-phase and out-of-phase optical signals reflected through the DMD; and a control processor which is linked with the light emitting unit, the DMD, and the photodetector, analyzes a target by applying 3D image processing on the received optical signals, and performs control for each area including the plurality of cells of the 2D array structure of the DMD through a DMD controller according to the result of the analysis. Therefore, the 3D imaging device can effectively perform long-distance target analysis and distance measurement by using digital detection signals.

Description

3D imaging device with DMD and operating method thereof

The present invention relates to a three-dimensional image apparatus, and more particularly, to a three-dimensional image apparatus for analyzing a target and measuring a distance using a digital micromirror device (DMD), and an operating method thereof.

The TOF proximity sensor, which is one of the optical sensors, measures the distance and depth by measuring the time difference between the reference point at which the pulse is emitted and the point at which the pulse is reflected back from the target. The TOF proximity sensor consists of a modulated light source such as an emitter such as a laser or light emitting diode (LED) and a receiver such as a single high-speed photodiode. It is used to calculate the distance by measuring the time it is shot and reflected.

Such a TOF sensor has the advantage of being able to measure distance without distance ambiguity even in a remote area of several m to several hundred km. , it is applied to the field of geodetic surveys of groundborne or airborne necessary for urban development, and in particular, such as satellite laser tracking system (SLR), laser altimeter, and distance measurement between satellites. It is also widely applied in the field of space development.

Among them, the TOF sensor used to generate a depth map uses a traditional TOF camera that measures the return distance by irradiating light, which is an essential element for depth measurement, but has the disadvantage of being expensive.

Recently, Microsoft has released a low-cost, entry-level depth sensor called the Kinect, which is widely used in 3D image acquisition devices. However, the Kinect camera projects structured light having a circular pattern onto an object to be measured, This is to estimate the degree of depth through the degree of distortion, and due to problems inside and outside the camera, such as a hole due to an occluded area caused by different positions of the IR projector and the IR camera, and noise around the boundary when the boundary surface of an object and the IR projector are perpendicular. There is a problem in that accurate depth information cannot be obtained.

In addition, TOF uses a three-dimensional image sensor called LIDAR (Light Detection And Ranging) or LADAR (Laser Detection And Ranging) to emit pulsed laser light toward the target, and then use the light receiving element to emit the light energy that is reflected back to the target. It is also used in systems that calculate the distance to the target or the moving speed of the target by converting the captured analog signal into a digital signal and analyzing it. However, such a TOF proximity distance sensor has a structural disadvantage in that the optical transmission/reception module must be mechanically rotated through a large-capacity rotary motor.

In addition, as a prior art related to the above-described TOF sensor, a lidar device and a distance measurement method of Korean Patent Application Laid-Open No. 10-2018-0012059 (2018.02.05.) are disclosed. In this prior art, a light source irradiating a laser pulse to an object, a light receiving unit receiving a laser pulse reflected from the object, forming a first periodic wave when the light source irradiates a laser pulse, and the light receiving unit receiving the laser pulse, a periodic wave generator configured to form a second periodic wave having the same frequency as the first periodic wave, and a comparator configured to compare phases of the first and second periodic waves generated from the periodic wave generator with each other; Although the method of deriving the distance to the target based on the phase is disclosed, this prior art also uses a single or several mirrors that reflect the laser pulse, and converts the analog signal into a digital signal, so rotation of the light source or mirror and signal conversion Because it includes the means and process for

The present invention has been derived to solve the problems of the prior art, and an object of the present invention is to omit a rotating light source or a rotating mirror using a digital micromirror device (DMD), and furthermore, to obtain a digital detection signal An object of the present invention is to provide a three-dimensional image apparatus capable of effectively performing long-distance target analysis and distance measurement, and an operating method thereof.

According to an embodiment of the present invention for solving the above technical problem, a three-dimensional image apparatus having a DMD includes: a light emitting unit irradiating modulated light of a predetermined wavelength; a DMD (Digital Micromirror Device) that has a two-dimensional array structure including a plurality of horizontal cells and a plurality of vertical cells, capable of individually addressing each cell, and reflects the laser light irradiated from the light emitting unit in a preset order; a photodetector for detecting an in-phase and out of phase optical signal reflected through the DMD; and the light emitting unit, the DMD, and the photodetector, analyze a target by applying 3D image processing to the received optical signal, and use the DMD controller according to the analysis result to have a two-dimensional array structure of the DMD It is configured to include; a control processor that controls each area made up of a plurality of cells.

According to another embodiment of the present invention, the control processor is turned on or off for each row or column consisting of a plurality of cells of the two-dimensional array structure of the DMD through the DMD controller according to the analysis result. can be controlled to switch to

According to another embodiment of the present invention, the control processor applies 3D image processing to the optical signal and analyzes a target through 3D image processing to determine an image of a person, a lane, or a vehicle.

According to another embodiment of the present invention, the control processor may apply three-dimensional image processing through an artificial intelligence algorithm to the optical signal to analyze a target to determine an image of a person, a lane, or a vehicle.

According to another embodiment of the present invention, the control processor applies 3D image processing to the optical signal to analyze a target, and controls a DMD controller to control an area consisting of a plurality of cells constituting an image of a person, a lane, or a vehicle. In an on state, it is possible to control a region other than the region including a plurality of cells constituting an image of a person, a lane, or a vehicle to be switched to an off state.

According to another embodiment of the present invention, a target is analyzed through 3D image processing based on the optical signal received in cooperation with the light emitting unit, the DMD, and the photodetector, and the distance to the target is analyzed as a result of the analysis and a control processor for measuring and generating a depth map of the target.

According to an embodiment of the present invention, a lens disposed on the front face of the DMD facing the target; and a housing having a side window in which the lens is installed and accommodating the light emitting unit, the DMD, the photodetector, and the control processor, wherein the light emitting unit and the photodetector are disposed adjacent to each other It is possible to irradiate light with respect to the same micromirror or receive reflected light.

According to another embodiment of the present invention, the control processor may include: a first module for generating a digital pattern by receiving a signal received by the photodetector; and a second module for calculating a distance measurement and a depth map for the target based on the digital pattern.

According to another embodiment of the present invention, the light emitting unit includes a first light emitting unit including a VCSEL; and a second light emitting unit including a VCSEL, wherein the photodetector may detect an optical signal irradiated from any one of the first light emitting unit and the second light emitting unit and reflected by the DMD. According to an embodiment of the present invention, there is provided a method of operating a 3D imaging device having a DMD, comprising: irradiating light modulated by a light emitting unit to a digital micromirror device (DMD); controlling a plurality of micromirrors arranged in an array form in the DMD; receiving a light signal reflected from each micromirror of the DMD at a photo detector; analyzing, by a control processor, a target by applying three-dimensional image processing to the optical signal, and controlling each region comprising a plurality of cells of the two-dimensional array structure of the DMD through a DMD controller according to the analysis result; and generating a digital pattern by receiving the signal received by the photodetector.

According to another embodiment of the present invention, in the controlling step, the control processor turns on each row or column consisting of a plurality of cells of the two-dimensional array structure of the DMD through the DMD controller according to the analysis result. It can be controlled to be switched to an off state.

According to another embodiment of the present invention, in the controlling step, the control processor applies 3D image processing to the optical signal to analyze a target to determine an image of a person, a lane, or a vehicle.

According to another embodiment of the present invention, in the controlling step, the control processor applies 3D image processing through an artificial intelligence algorithm to the optical signal to analyze a target to determine an image of a person, a lane, or a car .

According to another embodiment of the present invention, in the controlling step, the control processor applies three-dimensional image processing to the optical signal to analyze a target, and controls the DMD controller to configure a plurality of images of people, lanes, or cars. It is possible to control an area made up of cells to be switched to an on state, and an area other than the area made up of a plurality of cells constituting an image of a person, a lane, or a vehicle to be switched to an off state.

According to another embodiment of the present invention, in the controlling step, the light irradiated from the light emitting unit goes out toward an external target and the light reflected from the target enters the photodetector for a preset time period. You can control the movement or position of a specific micromirror.

According to another embodiment of the present invention, generating a digital pattern by receiving a signal received by the photodetector; and calculating a distance measurement and a depth map for the target based on the digital pattern.

According to another embodiment of the present invention, in the irradiating step, light is irradiated from the plurality of light emitting units to the DMD, and in the receiving step, any one of the plurality of light emitting units is irradiated and reflected by the DMD. The optical signal may be received by the optical detector.

According to the above-described three-dimensional imaging apparatus having a DMD and an operating method thereof, a rotating light source or a rotating mirror is omitted using a digital micromirror device (DMD), and furthermore, a remote target analysis and Distance measurement can be performed effectively.

In addition, according to the present invention, the target can be identified with higher accuracy by switching to an on or off state for each area of the two-dimensional array structure of the DMD according to the result of analyzing the target using the optical signal. Do.

In addition, according to the present invention, by controlling the scan speed, the tilt angle, and the speed of the On/Off state of the DMD, the distance to the target is measured through the data of the reflection time and incident time of the laser light addressed for each cell of the DMD, and the target By generating a depth map for , it is possible to obtain the effect of supplementing the disadvantages of the existing technology, which is designed to have a structure in which the optical transmission/reception module must be mechanically rotated through a large-capacity rotary motor.

1 is a block diagram showing the configuration of a three-dimensional image apparatus using a digital micromirror device (DMD) according to an embodiment of the present invention.
FIG. 2 is a perspective view of a DMD module that can be employed in the 3D imaging apparatus of FIG. 1 .
3 is a perspective view illustrating a state in which a part of the housing of the DMD module of FIG. 2 is removed.
FIG. 4 is a view for explaining an operating principle of the 3D image apparatus of FIG. 1 .
5 is a diagram for explaining an operating principle of a 3D image apparatus according to another embodiment of the present invention.
6 is a view for explaining an operating principle of a 3D image apparatus according to another embodiment of the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a 3D imaging apparatus using a digital micromirror device (DMD) according to an embodiment of the present invention, and FIG. 2 is a DMD module that can be employed in the 3D imaging apparatus of FIG. It is a perspective view, FIG. 3 is a perspective view showing a state in which a part of the housing of the DMD module of FIG. 2 is removed, and FIG. 4 is a view for explaining an operating principle of the 3D imaging device of FIG. 1 .

Referring to FIG. 1 , the three-dimensional image apparatus according to the present embodiment includes a DMD module 100 , a DMD controller 200 , a DMD voltage supply, an illumination driver, and a control unit. A processor (control processor: 300) is provided. Here, the DMD controller 200 may generate a control signal based on a reference voltage supplied by an oscillator, and may receive DC power from a DC power supply unit (DC PWR). The DMD voltage supplies and the illumination driver may also receive DC power from the DC PWR.

The control processor 300 may include a digital pattern creation unit, a distance measurement & depth map calculation unit, and a system control unit. The control processor 300 may control the operation of the DMD controller by transmitting a control signal to the DMD controller through an interface such as I2C or USB. In addition, the control processor 300 may start the operation of the DMD controller 200 through a hardware trigger or activate at least some means or a corresponding component in the DMD controller 200 .

The digital pattern generator generates a digital pattern by receiving the signal received by the photodetector. The distance measurement and depth map generator measures a distance from the target and calculates a depth map for the target based on the digital pattern. The system control unit controls operations of the DMD module 100 , the DMD controller 200 , the DMD voltage supply unit, the lighting driver, and the oscillator.

The DMD voltage supply unit applies control voltages such as a reset voltage (VRST), a bias voltage (VBIAS), an off voltage (VOFF) to the DMD 30 in the DMD module 100 , and enables (EN) from the DMD module 100 . ) can receive a response signal.

The illumination driver may supply a driving voltage to the light emitting unit 10 and the photodetector 50 in the DMD module 100 under the control of the control processor 300 .

The DMD controller 200 controls the operation of the DMD 30 in the DMD module 100 .

The DMD module 100 includes a light emitting unit 10 , a DMD 30 , a photodetector 50 , a lens 70 , and a housing 90 .

The light emitting unit 10 may include a vertical-cavity surface-emitting laser (VCSEL). The DMD 30 is a type of digital micromirror device, and rectangular mirrors are arranged on a surface in an array form to form a two-dimensional array structure composed of a plurality of horizontal cells and a plurality of vertical cells. made to do In this embodiment, the DMD 30 supports a resolution of 1024 horizontally and 768 vertically, but the resolution may vary depending on the embodiment and may be adjustable.

Each cell of the DMD 30 may be individually switched to an on (On) or off (Off) state by tilt-rotation with a predetermined inclination. The tilt angle may be arbitrarily adjusted according to the emission angle of the irradiated light of the light emitting unit 10 and the reception angle to the photodetector 50 .

When the DMD 30 is used, when a cell is turned on, the laser light irradiated from the light emitting unit 10 is reflected to the target, and the light received from the target is reflected to the photodetector 50. can

The micromirror 31 used in the DMD 30 of this embodiment may be a single mirror or a dual mirror. Each cell of the DMD 30 may correspond to each individually addressable, which may be used for data processing information of laser light reflected and received by each cell of the DMD 30 .

The laser light irradiated from the light emitting unit 10 is irradiated to the micromirror 31 of a specific cell of the DMD 30, and the micromirror 31 reflects the light according to the operating state or the inclination angle, and the DMD 30 is a reflection operation, whereby the light is irradiated to the target through the lens 70 or it is possible to receive the light reflected from the target. That is, when light is incident on the DMD 30 through the lens 70 , the DMD 30 may reflect the received light back to each cell unit and provide it to the photodetector 50 .

The photodetector 50 is a high-sensitivity avalanche photodiode (APD), a silicon photomultiplier (SiPM), a single photon avalanche diode (SPAD) that converts the photoelectric effect of a semiconductor electronic device into power, or a photocell, imaging sensors such as charge coupled devices (CCDs) and similar photodiode devices.

In addition, the photodetectors 50 may be arranged in the form of one or more arrays, and the array of photodetectors 50 may incorporate the laser light signals reflected over time to correct errors or correct diffraction and scattering values. there is. As an example, the photodetector 50 may detect laser light reflected from the target, synchronized with each cell of the DMD 30 and incident, and may transmit the detected laser light to the control processor 300 . In this case, the detected laser light may be a modulated digital signal.

Meanwhile, when the signal output from the photodetector 50 is in an analog form, it may be converted into a digital signal by an analog-to-digital converter (ADC).

The optical signal input to the control processor 300 may be used to measure a distance from a target and calculate a depth map for the target by target analysis through 3D image processing of the control processor 300 . The control processor 300 may control the DMD module 100 and support 3D image processing.

The system control unit of the control processor 300 may include a driving program or a driving module for controlling specific hardware of the 3D image apparatus using the DMD module 100 of the present invention or a driver of a component device.

In addition, the system control unit controls the scan speed of the DMD 30 and the speed of the tilt and On/Off states in conjunction with the DMD controller 200, and receives data according to the reflection time and incident time of the laser light addressed for each cell. can

The DMD controller 200 is a driving device for directly controlling the DMD 30 , and may control a driving driver of the DMD 30 and set a configuration.

The control processor 300 interworks with the light emitting unit 10 and controls it to control the output state of the laser light, and may receive the optical signal detected by the photodetector 50 as an input. Correspondingly, the DMD 30 may be controlled through the DMD controller 200 .

The control processor 300 may analyze a target by applying 3D image processing to an optical signal, and may control each area including a plurality of cells of the 2D array structure of the DMD 30 according to the analysis result.

In addition, the control processor 300 analyzes a target by applying 3D image processing to an optical signal, and turns on each row or column consisting of a plurality of cells of the 2D array structure of the DMD 30 according to the analysis result It can be controlled to be switched to (On) or off (Off) state.

More specifically, the control processor 300 may determine an image of a person, a lane, or a car by analyzing a target through three-dimensional image processing based on the optical signal, and at this time, three-dimensional image processing through an artificial intelligence algorithm The target can be analyzed to determine the image of a person, lane, or car.

In addition, the control processor 300 applies three-dimensional image processing to the optical signal to analyze the target, and controls the DMD controller 200 to turn on each area consisting of a plurality of cells constituting the image of a person, lane, or car ( On) or off (Off) state can be controlled to be switched.

As described above, according to the present invention, according to the result of analyzing the target using the optical signal in the control processor 300, it is switched to the on or off state for each area of the two-dimensional array structure of the DMD, so that the higher accuracy Target can be identified. The distance measurement and depth map generation unit analyzes the pattern of the target image by comparing it with the synchronized data in each cell of the DMD 30 with respect to the laser light irradiated by the DMD 30 and reflected from the target to generate a 3D image. The time difference between the reference point at which the laser light is emitted and the point at which the laser light is reflected back from the target is measured by the time-of-flight distance measurement method, and the distance to the target is measured based on this, and a depth map for the target is calculated. can

In addition, the control processor 300 corrects the error in distance measurement to the target based on the optical signal level and the time difference between the reference point at which the laser light is emitted and the detection time of the laser light reflected back from the target target. function can be performed.

To this end, the control processor 300 may include a memory, and the memory includes time information when the laser light is scanned and reflected from each cell addressed by the DMD 30 and time when the laser light is reflected from the target and scanned in reverse. information can be recorded.

On the other hand, in the present embodiment, the light emitting unit 10 and the photodetector 50 are disposed adjacent to each other to irradiate or reflect light during an ON operation or an activated operation time of one micromirror 31 for one time. can receive To this end, the light emitting unit 10 and the photodetector 50 may be integrally formed as a single hardware module structure 60 . For example, the light emitting unit 10 and the photodetector 50 may be disposed on a single printed circuit board. The photodetector 50 may include at least two detector array pairs for detecting in-phase and out-of-phase optical signals reflected through the DMD.

On the other hand, the aforementioned photodetector 50 is preferably disposed adjacent to the light emitting unit 10 , but may be disposed at various locations within the housing 90 depending on implementation. In this case, the position/tilt control of the micromirror reflecting the irradiated light may be sequentially controlled to have two inclination angles in a unit operation time.

The operating principle of the above-described three-dimensional image apparatus is illustrated in FIG. 4 .

First, when the control signal of the control processor 300 is applied to the lighting driver, the lighting driver in the power supply state controls the light emitting unit to irradiate light to the DMD. At the same time, when a control signal from the control processor 300 is applied to the 3D image processing unit, the 3D image processing unit transmits and receives system control data to and from the DMD controller 200 so that the DMD controller 200 is It operates to control the DMD (30). The DMD controller 200 controls the DMD 30 based on system control data from the 3D image processing unit, whereby the DMD 30 reflects the irradiated light of the light emitting unit 10 from the specific micromirror 31 . It is transmitted to the target, and reflected light returning from the target may be reflected and transmitted to the photodetector 50 .

Next, the signals detected by the photodetector 50 are input to the 3D image processing unit directly or through an analog-to-digital converter (ADC), and the 3D image processing unit processes the input signal to measure the distance to the target or depth to the target. It is possible to calculate a map and output an analysis result for a target. In this case, the 3D image processing unit may receive a signal received by the photodetector 50 , generate a digital pattern, and calculate a distance measurement and a depth map to the target based on the digital pattern. The above-described 3D image processing unit includes a first module for generating a digital pattern by receiving a signal received by the photodetector 50, and a second module for calculating a distance measurement and depth map to the target based on the digital pattern can do. The first module may correspond to the digital pattern generator, and the second module may correspond to the distance measurement and depth map generator.

On the other hand, the three-dimensional image apparatus according to the above-described embodiment has been mainly described with the light emitting unit 10 and the photodetector 50 disposed adjacent to each other or configured in the form of a single module, but the present invention is not limited to such a configuration. , a beam splitter, etc. may be used to dispose the photodetector 50 at any position in the housing 90 .

5 is a diagram for explaining an operating principle of a 3D image apparatus according to another embodiment of the present invention.

Referring to FIG. 5 , the 3D imaging device according to the present embodiment includes a light emitting unit 10 made of a vertical-cavity surface-emitting laser (VCSEL), a DMD 30 , and an avalanche photodiode (APD). ), a photodetector 50, a beam splitter 80, an analog-to-digital converter (ADC), a lighting driver, a power supply, and a 3D image processing unit ( 3D image processing), a DMD controller 200 , and DMD voltage supplies.

In particular, the 3D image device according to the present embodiment transmits the light from the light emitting unit through the beam splitter 80 to the DMD 30 , reflects the light from the DMD 30 and transmits it to the photodetector 50 . it can be done to In this case, the photodetector 50 may be disposed at any position in the housing 90 of the DMD module 100 , thereby increasing the degree of freedom in designing the structure or shape of the device.

6 is a view for explaining an operating principle of a 3D image apparatus according to another embodiment of the present invention.

Referring to FIG. 6 , the three-dimensional imaging device according to the present embodiment includes light emitting units 10 and 15 made of a laser diode VCSEL (Vertical-Cavity Surface-Emitting Laser), a DMD 30, and an avalanche photodiode ( A photodetector 50 made of an avalanche photodiode, APD, etc., an analog-to-digital converter (ADC), a lighting driver (illum. driver), a power supply, and a 3D image processing unit (3D image processing); It may include a DMD controller 200 and DMD voltage supplies.

In this case, the light emitting unit may include a first light emitting unit 10 including a laser VCSEL and a second light emitting unit 15 including a VCSEL.

Accordingly, when the control signal of the control processor 300 is applied to the lighting driver, the lighting driver in a power supply state controls the first and second light emitting units 10 and 15 to irradiate light to the DMD 30, and the light The detector 50 may detect an optical signal irradiated from the first light emitting unit 10 and the second light emitting unit 15 and reflected by the DMD 30 .

That is, in the embodiment of FIG. 6 , the range of light reflected by the DMD 30 and irradiated to the target by using the plurality of light emitting units 10 and 15 is extended, thereby enabling analysis of a wider range of targets. .

Although the above has been described with reference to the preferred embodiment of the present invention, it is understood that those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims. you will understand

Claims (17)

a light emitting unit that irradiates modulated light of a predetermined wavelength and includes a vertical-cavity surface-emitting laser (VCSEL);
a DMD (Digital Micromirror Device) that has a two-dimensional array structure including a plurality of horizontal cells and a plurality of vertical cells, capable of individually addressing each cell, and reflects the laser light irradiated from the light emitting unit in a preset order;
a photodetector that detects an in-phase and out-of-phase optical signal reflected through the DMD; and
The light emitting unit, the DMD, and the photodetector are interlocked, the target is analyzed by applying 3D image processing to the received optical signal, and the DMD's two-dimensional array structure is analyzed through the DMD controller according to the analysis result. a control processor for controlling each region composed of a plurality of cells;
A three-dimensional imaging device having a DMD comprising a. The method according to claim 1,
The control processor is
A 3D imaging device having a DMD that controls switching to an on or off state for each row or column composed of a plurality of cells of the two-dimensional array structure of the DMD through a DMD controller according to the analysis result. The method according to claim 1,
The control processor is
A three-dimensional image apparatus having a DMD that applies three-dimensional image processing to the optical signal and analyzes a target through three-dimensional image processing to determine an image of a person, a lane, or a car. The method according to claim 1,
The control processor is
A three-dimensional image device having a DMD that analyzes a target by applying three-dimensional image processing through an artificial intelligence algorithm to the optical signal to determine an image of a person, a lane, or a car. The method according to claim 1,
The control processor is
By applying 3D image processing to the optical signal to analyze the target, the DMD controller controls the area made up of a plurality of cells constituting the image of a person, lane, or car to be turned on, and the image of a person, lane, or car is turned on. A 3D imaging apparatus having a DMD that controls an area other than the area comprising a plurality of cells to be switched to an off state. The method according to claim 1,
The light emitting unit, the DMD, and the photodetector are interlocked and the target is analyzed based on the received optical signal through 3D image processing, and as a result of the analysis, the distance to the target is measured and a depth map of the target is generated. A three-dimensional image device having a DMD, including a control processor. The method according to claim 1,
a lens disposed on the front surface of the DMD facing the target; and
A housing having a window on one side in which the lens is installed and accommodating the light emitting unit, the DMD, the photodetector, and the control processor;
The light emitting unit and the photodetector are disposed adjacent to each other to irradiate light with respect to the same micromirror or receive reflected light. The method according to claim 1,
The control processor is
a first module for generating a digital pattern by receiving a signal received by the photodetector; and
and a second module for calculating a distance measurement and a depth map for the target based on the digital pattern. The method according to claim 1,
The light emitting unit,
a first light emitting unit including a VCSEL; and
Including; a second light emitting unit including a VCSEL;
The photodetector is
A three-dimensional imaging apparatus having a DMD, which detects an optical signal irradiated from any one of the first light emitting unit and the second light emitting unit and reflected by the DMD. irradiating light modulated by a light emitting unit including a Vertical-Cavity Surface-Emitting Laser (VCSEL) with a Digital Micromirror Device (DMD);
controlling a plurality of micromirrors arranged in an array form in the DMD;
receiving a light signal reflected from each micromirror of the DMD at a photo detector;
analyzing, by a control processor, a target by applying three-dimensional image processing to the optical signal, and controlling each region comprising a plurality of cells of the two-dimensional array structure of the DMD through a DMD controller according to the analysis result; and generating a digital pattern by receiving a signal received by the photodetector;
A method of operating a 3D imaging device having a DMD comprising a. 11. The method of claim 10,
The controlling step is
According to the result of the analysis by the control processor, a DMD that controls to be switched to an on or off state for each row or column consisting of a plurality of cells of the two-dimensional array structure of the DMD through a DMD controller 3 How a dimensional imaging device works. 11. The method of claim 10,
The controlling step is
An operating method of a 3D image device having a DMD in which the control processor applies 3D image processing to the optical signal to analyze a target to determine an image of a person, a lane, or a vehicle. 11. The method of claim 10,
The controlling step is
A method of operating a three-dimensional image device having a DMD in which the control processor applies three-dimensional image processing through an artificial intelligence algorithm to the optical signal to analyze a target to determine an image of a person, a lane, or a car. 11. The method of claim 10,
The controlling step is
The control processor applies three-dimensional image processing to the optical signal to analyze the target, and controls the DMD controller to turn on the area consisting of a plurality of cells constituting the image of a person, lane, or car to turn on, turn on the human, lane Alternatively, a method of operating a three-dimensional image apparatus having a DMD for controlling an area other than the area including the plurality of cells constituting the vehicle image to be switched to an off state. 11. The method of claim 10,
The controlling includes controlling the movement or position of a specific micromirror for a preset time so that the light irradiated from the light emitting unit goes out toward an external target and the light reflected from the target enters the photo detector. ,
A method of operating a 3D imaging device having a DMD. 16. The method of claim 15,
generating a digital pattern by receiving a signal received by the photodetector; and
Calculating a distance measurement and depth map to the target based on the digital pattern; further comprising, a method of operating a 3D imaging device with a DMD. 11. The method of claim 10,
The investigation step is
Light is irradiated to the DMD from the plurality of light emitting units,
The receiving step is
A method of operating a three-dimensional image apparatus having a DMD in which the photodetector receives an optical signal emitted from any one of the plurality of light emitting units and reflected by the DMD.

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