Integrated portable infrared transparent window snapshot imaging device and method

Abstract

The invention discloses an integratable portable infrared transparent window snapshot imaging device and method, and solves the problems that an existing transparent window snapshot device is poor in scene adaptability and can only realize snapshot of a single lane on the side of a road. The device specifically comprises a rotating table, and an acquisition unit, a driving unit, a processing unit and a laser emitting assembly which are arranged on the rotating table, the rotating table is used for driving the acquisition unit to perform azimuth rotation and pitching rotation; the acquisition unit is used for acquiring an image, an azimuth rotation angle and a pitching rotation angle of a to-be-photographed object, and a pitching inclination angle fluctuation quantity and an acceleration fluctuation quantity of the whole device; the driving unit is used for driving the rotating table and the collecting unit to work; the processing unit is used for processing the image, the azimuth rotation angle, the pitching rotation angle, the pitching inclination angle fluctuation quantity and the acceleration fluctuation quantity, and driving the driving unit to do corresponding work; and the laser emitting assembly is connected with the driving unit and is used for sending near-infrared band polarized light to the object to be photographed when the acquisition unit works.

Description

Technical Field

[0001] The present invention relates to an imaging device and method, and specifically to an integrated portable infrared through-window snapshot imaging device and method, and more particularly to an infrared through-window snapshot imaging device and method for stably capturing the interior of a moving vehicle under active laser lighting conditions and in combination with attitude sensor data fusion. Background Art

[0002] The current situation has put forward higher requirements for the traffic control department's ability to detect vehicle driving safety, especially in the detection of the internal conditions of the moving vehicle, such as whether it is overloaded, whether there are passengers and cargo mixed, whether the front and rear passengers are wearing seat belts, etc., which are greatly related to the safe driving of the vehicle and the effective rescue time when a safety accident occurs. The importance of these is mainly reflected in the following aspects:

[0003] (1) Overloading a vehicle will lead to vehicle overloading and increased tire load, which will cause vehicle instability, increased vehicle inertia, longer braking distance, and even tire blowout and brake failure;

[0004] (2) Passengers who are not wearing seat belts or who exceed the approved number of passengers are usually not protected by safety measures. In the event of an accident, they are prone to secondary collision or crushing, or even falling out of the vehicle;

[0005] (3) If a collision or rollover accident occurs and the number of passengers exceeds the rated capacity, it will cause great difficulties for the escape and rescue of passengers;

[0006] (4) Some vehicles carry a mixture of passengers and cargo. In the event of sudden braking or a collision, the cargo may cause harm to the occupants due to inertia. In particular, in the event of a fire or spontaneous combustion, the cargo may aggravate the spread of the fire and the degree of combustion.

[0007] In summary, vehicle window detection is an extremely important task. However, traditional traffic checkpoint capture cameras or surveillance cameras usually only have the function of frontal capture under daylight conditions or the addition of near-infrared LED lighting devices to achieve frontal capture under night conditions, making it difficult to accurately capture passengers in the vehicle and the riding environment. In the past two years, a new through-window capture system has appeared on the market that uses high-power lasers for front and side fill light at the same time, and uses a gantry front checkpoint camera and a road side camera to capture moving vehicles at the same time, thereby realizing the identification of passengers inside the vehicle. However, both traditional capture systems and newly emerging through-window capture systems have significant limitations, which are mainly reflected in the following points:

[0008] (1) Most private vehicles (including sedans, commercial MPVs, SUVs, and rectangular passenger cars) usually choose to stick high-transmittance glass protection films on the front windshield, and high-reflective or dark-colored glass protection films on the side windows. Traditional bayonet cameras and surveillance cameras have difficulty in capturing the interior of the vehicle through these side window films;

[0009] (2) When emitting light, LED lamp beads are similar to Lambertian bodies. In order to increase the light power during flashing or stroboscopic lighting, multiple LEDs are usually arranged in an array and lenses are applied to limit the effective illumination angle to 60 to 120 degrees. However, the energy concentration is not high and the directionality is not very good. Most vehicles have a certain angle with the ground on both sides. When sunlight or LED flashes shine on the side windows, most of the light is reflected, making it difficult to illuminate the interior of the vehicle. Therefore, traditional LED fill-light snapshot cameras cannot capture the interior of the vehicle.

[0010] (3) When strong sunlight or LED flashing lights shine on the side windows, the outer surface of the window will reflect most of the light. A small amount of polarized light that enters the vehicle interior and is reflected again contains valid information, but its intensity is much smaller than the reflected light from the outer surface of the window. Traditional snapshot cameras can only capture the reflection of the outer surface of the window, and may even cause local saturation.

[0011] (4) The new capture system uses a front capture camera installed on the front gantry to capture the vehicles in the outermost lane from the front, and uses a high-power laser for fill light. At the same time, it triggers the capture camera located on the side of the road to capture. The side camera also needs to use high-power laser fill light. Although this system can capture about 50% of the vehicles through the window, it also has certain limitations, mainly the following points:

[0012] A. In order to ensure that the front capture camera and the side capture camera can capture the same vehicle at the same time, the system needs to strictly comply with the manufacturer's installation distance and height during installation. The installation is led by the manufacturer and needs to be strictly fixed after installation. It cannot be moved at will, and its adaptability to the scene is poor.

[0013] B. Both the front capture camera and the side capture camera require high-power laser for fill light, and the instantaneous power should be no less than 50W. In particular, the side camera is close to the vehicle (4 to 6 meters), which poses a risk of eye damage to pedestrians passing by.

[0014] C. Due to the limitation of the installation position, the vehicles in the second and third lanes will be blocked by the vehicles in the first lane and cannot be illuminated or photographed. Therefore, the side window camera can only capture the single lane on the side of the road.

[0015] D. The system price is relatively high and it is not suitable to purchase and install in large quantities.

[0016] In summary, vehicle window detection is extremely important, but current detection technologies have certain limitations. Summary of the invention

[0017] The purpose of the present invention is to provide an integrated portable infrared through-window capture imaging device and method to solve the technical problems of existing through-window capture devices, such as poor adaptability to scenes, risk of eye damage to pedestrians, only being able to capture a single lane on the side of the road, only being able to capture scenes reflected on the outer surface of the window glass, difficulty in capturing the interior of the vehicle, and excessively high costs.

[0018] The present invention discloses an infrared through-window snapshot imaging device and method for stably capturing the interior of a moving vehicle under active laser illumination and in combination with attitude sensor data fusion. The vehicle shape and motion information of the moving vehicle are identified by a global shutter camera, the effective time of the current active illumination laser and the exposure time of the through-window snapshot camera are calculated, and the control system is fed back in combination with the data of the attitude sensor to compensate for the pitch displacement required for clear imaging in the current moving state, thereby avoiding jitter during movement and achieving clear imaging of the exterior and interior of the moving vehicle. The high-definition global shutter camera operates in the visible light band and is used to identify the main features of the vehicle: vehicle type, vehicle color, license plate number, etc.; the active laser illumination laser emits a modulated near-infrared band polarized light; the optical system of the through-window snapshot camera can receive polarized light consistent with the active laser illumination polarization state, and has a good response in the near-infrared band; secondly, the global shutter camera, active illumination laser and through-window snapshot camera are all installed on a rotating table to achieve all-round shooting.

[0019] In order to achieve the above object, the present invention adopts the following technical solution:

[0020] An integrated portable infrared through-window snapshot imaging device, which is special in that it includes a rotating table and a collection unit, a driving unit, a processing unit and a laser emission component arranged on the rotating table;

[0021] The rotating platform is used to drive the acquisition unit to perform azimuth rotation and pitch rotation;

[0022] The acquisition unit is used to acquire the image of the object to be photographed, the azimuth rotation angle and the pitch rotation angle of the rotating stage, and the pitch inclination fluctuation amount and the acceleration fluctuation amount of the entire device;

[0023] The driving unit is used to drive the rotating table and the collecting unit to work;

[0024] The processing unit is connected to the acquisition unit and the driving unit respectively, and is used to process images, azimuth rotation angles and pitch rotation angles, pitch inclination fluctuations and acceleration fluctuations, and drive the driving unit to perform corresponding work based on the processing results;

[0025] The laser emitting component is connected to the driving unit and is used to send near-infrared band polarized light to the object to be photographed when the acquisition unit is working.

[0026] Further, the acquisition unit includes an azimuth absolute encoder, a pitch absolute encoder, a posture sensor circuit, a global shutter camera, and a through-window snapshot camera, all of which are connected to the driving unit;

[0027] The azimuth absolute encoder is used to collect the azimuth rotation angle of the rotating table and send it to the processing unit;

[0028] The pitch absolute encoder is used to collect the pitch rotation angle of the rotating table and send it to the processing unit;

[0029] The attitude sensor circuit is used to collect the pitch angle fluctuation and acceleration fluctuation of the entire device and send them to the processing unit;

[0030] The global shutter camera is used to collect the external feature image of the object to be photographed and send it to the processing unit;

[0031] The through-window snapshot camera is used to collect internal feature images of the object to be photographed and send the images to the processing unit.

[0032] Furthermore, the rotating platform includes a U-shaped pan / tilt bracket, a spherical protective cover, and a fixed shell;

[0033] The U-shaped pan / tilt bracket is installed on the top of the fixed housing, with its U-shaped opening facing upwards;

[0034] The spherical protective cover is installed at the U-shaped opening of the U-shaped pan / tilt bracket, and the global shutter camera, the laser emission component and the through-window snapshot camera are all installed in the spherical protective cover;

[0035] The drive unit includes a power management module, an azimuth motor drive circuit, an azimuth brushless DC motor, a pitch motor drive circuit, a laser drive circuit and a pitch hollow shaft motor;

[0036] The power management module is arranged in the fixed housing, the input end of which is connected to the power supply connector embedded in the side wall of the fixed housing, the first output end of which is connected to the circuit board A, and the second output end of which is connected to the circuit board B through a conductive slip ring; the circuit board B is installed in the U-shaped pan-tilt bracket; the conductive slip ring is arranged between the fixed housing and the U-shaped pan-tilt bracket, and is used to realize the corresponding electrical connection when the fixed housing and the U-shaped pan-tilt bracket rotate relative to each other;

[0037] The azimuth motor drive circuit is arranged on the circuit board A, the input end of which is connected to the processing unit, and the output end of which is connected to the input end of the azimuth brushless DC motor;

[0038] The azimuth brushless DC motor is arranged in a fixed housing, the stator of the azimuth brushless DC motor is fixedly connected to the fixed housing, the upper end of the rotor of the azimuth brushless DC motor passes through the center of the conductive slip ring and is connected to the U-shaped pan / tilt bracket, so as to drive the rotating table to rotate in azimuth; the azimuth absolute encoder is installed at the lower end of the rotor of the azimuth brushless DC motor;

[0039] The stator of the conductive slip ring is sleeved on the rotor of the azimuth brushless DC motor and is fixedly connected to the fixed housing; the rotor of the conductive slip ring is fixedly sleeved on the rotor of the azimuth brushless DC motor and is fixedly connected to the U-shaped pan / tilt bracket;

[0040] The pitch motor driving circuit is arranged on the circuit board B, the input end of which is connected to the processing unit, and the output end of which is connected to the input end of the pitch hollow shaft motor;

[0041] The laser driving circuit is arranged on the circuit board B, the input end of which is connected to the processing unit, and the output end of which is connected to the laser emitting component;

[0042] The pitch hollow shaft motor is arranged on a side wall of the U-shaped pan / tilt bracket, and its output end is connected to the spherical protective cover to drive the spherical protective cover to rotate, so as to realize the pitch rotation of the rotating platform;

[0043] The pitch absolute encoder is arranged on the other side wall of the U-shaped pan / tilt bracket, the input end of the encoder is connected to the spherical protective cover, and the output end of the encoder is connected to the processing unit;

[0044] The connection points of the pitch absolute encoder and the pitch hollow shaft motor with the spherical protective cover are located on the same diameter thereof;

[0045] The posture sensor circuit is mounted on a circuit board B.

[0046] Further, the processing unit includes a signal processing circuit and a data fusion processing circuit;

[0047] The signal processing circuit is arranged on the circuit board A, and is respectively connected to the output end of the azimuth absolute encoder and the input end of the azimuth motor drive circuit, and is also connected to the data fusion processing circuit through a conductive slip ring, and is also connected to the data connector embedded in the side wall of the fixed housing through the data output circuit arranged on the circuit board A;

[0048] The data fusion processing circuit is arranged on the circuit board B, and is respectively connected to the output end of the attitude sensor circuit, the output end of the pitch absolute encoder, the input / output end of the global shutter camera, the input / output end of the through-window snapshot camera, the input end of the pitch motor drive circuit, and the input end of the laser drive circuit.

[0049] Further, the laser emission assembly includes an emission window embedded in the side wall of the spherical protective cover, and a laser and a laser shaping and emission optical system arranged in the spherical protective cover;

[0050] The input end of the laser is connected to the output end of the laser driving circuit for emitting infrared laser;

[0051] The laser shaping and emission optical system is arranged at the emission end of the laser, and its focal plane coincides with the emission surface of the laser. It is used to shape and expand the infrared laser and modulate it into polarized light, which passes through the emission window to the object to be photographed.

[0052] Furthermore, the through-window snapshot camera includes a receiving window embedded in the side wall of the spherical protective cover, and a receiving optical system, a microlens array and a CMOS image sensor module arranged in the spherical protective cover;

[0053] The receiving end of the receiving optical system corresponds to the receiving window and is used to receive and converge the laser reflected by the object to be photographed;

[0054] The CMOS image sensor module is arranged at the exit end of the receiving optical system, and its photosensitive surface coincides with the optimal phase surface of the receiving optical system, and is used for imaging and transmitting the corresponding image information to the data fusion processing circuit;

[0055] The microlens array is arranged on the optical path between the receiving optical system and the CMOS image sensor module, and is used for screening polarized light.

[0056] An integrable portable infrared through-window snapshot imaging method adopts the above-mentioned integrable portable infrared through-window snapshot imaging device, and its special feature is that it includes the following steps:

[0057] Step 1: The acquisition unit sequentially acquires external feature images G1, G2, ... G N , N ≥ 2, and continuously collect the pitch angle fluctuation A of the entire device 11 , A 12 , A 13 …A 1M and acceleration fluctuation a 11 、a 12 、a 13 …a 1J , M ≥ 2, J ≥ 2, sent to the processing unit;

[0058] Step 2: The processing unit receives the external feature image G1 and reads the pitch angle fluctuation amount A 12 , A 13 …A 1m and acceleration fluctuation a 11 、a 12 …a 1j , 1≤m≤M, 1≤j≤J, calculate the average value and Pitch angle fluctuation A 12 , A 13 …A 1m and acceleration fluctuation a 11 、a 12 …a 1j All are data received by the processing unit before receiving the next external feature image G2;

[0059] Step 3: The driving unit drives the rotating stage to perform reverse pitch compensation rotation movement, and the compensation amount is ΔA1;

[0060] Step 4: The processing unit receives the external feature image G2, obtains the arithmetic mean values ​​ΔA2 and Δa2 using the method in step 2, and calculates the absolute value difference ΔE=|Δa1-Δa2| between two adjacent arithmetic mean values, thereby calculating the illumination time t of the current laser emission component:

[0061] t=T*K

[0062] Where T is the basic timing of the laser emission component, is the laser illumination time coefficient;

[0063] Step 5: The driving unit drives the rotating stage to perform reverse pitch compensation rotation movement, and the compensation amount is ΔA2; and drives the laser emission component to send near-infrared polarized light to the object to be photographed, and the illumination time is t;

[0064] Step 6: When the object to be photographed is irradiated with polarized light in the near-infrared band, the acquisition unit continuously acquires X internal characteristic images of the object to be photographed, where X is a multiple of 4 and a positive integer;

[0065] Step 7: The processing unit establishes a Stokes vector model based on the X internal feature images to restore the information image P1 of the internal polarized light of the object to be photographed;

[0066] Step 8: Use the method of steps 4-7 to process the external feature images G3...G N , obtain Y information images P2…P Y , Y = N-1; complete the infrared window capture imaging, the image includes external feature images G1, G2...G N and information image P2…P Y .

[0067] Furthermore, step 1 is specifically as follows:

[0068] The global shutter camera collects the external feature images G1, G2…G N The attitude sensor circuit continuously collects the pitch angle fluctuation A of the imaging device 11 , A 12 , A 13 …A 1M and acceleration fluctuation a 11 、a 12 、a 13 …a 1J , sent to the data fusion processing circuit;

[0069] Step 2 is as follows:

[0070] The data fusion processing circuit receives the external feature image G1 and reads the pitch angle fluctuation amount A 12 , A 13 …A 1m and acceleration fluctuation a 11 、a 12 …a 1j , calculate the average and

[0071]

[0072] Furthermore, step 3 is specifically as follows:

[0073] The data fusion processing circuit drives the pitch hollow shaft motor through the pitch motor driving circuit to drive the spherical protective cover to perform reverse pitch compensation rotation movement, and the compensation amount is ΔA1;

[0074] Step 4 is as follows:

[0075] The data fusion processing circuit receives the external feature image G2, obtains the arithmetic mean values ​​ΔA2 and Δa2 using the method in step 2, and calculates the absolute value difference ΔE=|Δa1-Δa2| between two adjacent arithmetic mean values, thereby calculating the illumination time t=T*K of the current laser emission component;

[0076] Step 5 is as follows:

[0077] The data fusion processing circuit drives the pitch hollow axis motor through the pitch motor driving circuit to drive the spherical protective cover to perform reverse pitch compensation rotation movement, and the compensation amount is ΔA2; and drives the laser emission component to send near-infrared band polarized light to the object to be photographed, the illumination time is t, and the laser band used is the near-infrared band.

[0078] Furthermore, step 6 is specifically as follows:

[0079] When the through-window snapshot camera irradiates the object with polarized light in the near-infrared band, it continuously exposes four times, with each exposure time being 1 / 4t, to obtain four internal feature images of the object;

[0080] Step 7 is as follows:

[0081] The data fusion processing circuit establishes a Stokes vector model based on the four internal feature images and restores the information image P1 of the internal polarized light of the object to be photographed.

[0082] Beneficial effects of the present invention:

[0083] 1. The integrable portable infrared through-window capture imaging device provided by the present invention is compact in size, has simple external mechanical and physical interfaces, and is easy to install. It can be fixed on the top of a traffic police patrol vehicle to patrol and capture any lane of the road, or it can be placed on the side of the road through a tripod bracket for through-window capture detection, or it can be hung on a drone for unmanned patrol capture, and has a wide range of application scenarios.

[0084] 2. The rotating platform used in the present invention includes a U-shaped pan-tilt bracket and a fixed shell, which can realize free adjustment of azimuth 0° to 360° and pitch ±45°, and has strong scene adaptability.

[0085] 3. The present invention integrates the posture sensor data and eliminates the influence of jitter on clarity through closed-loop control motion compensation, thereby achieving reliable capture in a moving state.

[0086] 4. The present invention integrates the attitude sensor data, calculates the laser illumination time coefficient, and adjusts the laser lighting time in real time through the laser driving circuit to avoid overexposure and underexposure in the through-window capture process.

[0087] 5. The present invention adopts a global shutter camera, which can automatically start the exposure trigger function when a vehicle enters its field of view without the need for an external trigger signal.

[0088] 6. The present invention can capture images in motion. The relative speed between the device and the captured vehicle is relatively low. Low-power laser can be used for active irradiation. The average power is no more than 5mW, which meets the Class II safety level and avoids damage to human eyes.

[0089] 7. The present invention adopts active laser lighting in the near-infrared band, and utilizes its high energy concentration and directionality to allow light to pass through the car window smoothly, providing the necessary conditions for realizing the through-window capture function. If commonly used near-infrared band laser auxiliary lighting such as 780nm, 808nm, 850nm, 940nm, etc. is used, it should be protected by the present invention.

[0090] 8. The present invention shapes and expands the laser beam, thereby increasing the irradiation range of the laser beam, shaping the light spot shape, and modulating the laser beam into polarized light.

[0091] 9. The present invention applies a microlens array on the optical path between the receiving optical system and the CMOS image sensor module, which can screen out polarized light only related to the polarization state of the modulated laser, and further remove interfering light.

[0092] 10. The present invention establishes a Stokes vector model through four images continuously taken by a through-window snapshot camera, and restores the information image of polarized light inside the vehicle, so that the situation inside the vehicle, such as passengers, cargo, etc., can be clearly distinguished.

[0093] 11. The present invention outputs two types of camera captured image data, wherein the global shutter camera operates in the visible light band and can identify the main external features of the vehicle: vehicle type, vehicle color, license plate number, etc.; the through-window capture camera operates in the near-infrared band and can capture the internal situation of the vehicle, facilitating the accurate positioning of the corresponding vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0094] Figure 1 It is a structural schematic diagram of an embodiment of an integrated portable infrared through-window snapshot imaging device of the present invention;

[0095] Figure 2 is a schematic diagram of the structure of a circuit board A in an embodiment of the present invention;

[0096] Figure 3 is a schematic diagram of the structure of a circuit board B in an embodiment of the present invention;

[0097] Figure 4 is a schematic structural diagram of a laser emission assembly in an embodiment of the present invention;

[0098] Figure 5 is a schematic structural diagram of a through-window snapshot camera according to an embodiment of the present invention;

[0099] Figure 6 Schematic diagram of inclination fluctuation and acceleration fluctuation in an embodiment of the present invention.

[0100] Figure Number:

[0101] 1-power management module, 2-signal processing circuit, 3-azimuth motor drive circuit, 4-data output circuit, 5-azimuth absolute encoder, 6-azimuth brushless DC motor, 7-conductive slip ring, 8-data fusion processing circuit, 9-attitude sensor circuit, 10-pitch motor drive circuit, 11-laser drive circuit, 12-pitch hollow shaft motor, 13-global shutter camera, 14-laser emission component, 14.1-laser, 14.2-laser shaping and emission optical system, 14.3-emission window, 15-through-window snapshot camera, 15.1-receiving window, 15.2-receiving optical system, 15.3-microlens array, 15.4-CMOS image sensor module, 16-pitch absolute encoder, 17-U-type gimbal bracket, 18-spherical protective cover, 19-fixed shell, 20-power connector, 21-data connector. DETAILED DESCRIPTION

[0102] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0103] An embodiment of the present invention provides an integrated portable infrared window capture imaging device for use in vehicles, such as Figure 1-Figure 3 As shown, the imaging device consists of a power management module 1, a signal processing circuit 2, an azimuth motor drive circuit 3, a data output circuit 4, an azimuth absolute encoder 5, an azimuth brushless DC motor 6, a conductive slip ring 7, a data fusion processing circuit 8, a posture sensor circuit 9, a pitch motor drive circuit 10, a laser drive circuit 11, a pitch hollow shaft motor 12, a high-definition global shutter camera 13, a laser emission component 14, a through-window snapshot camera 15, a pitch absolute encoder 16, a U-shaped gimbal bracket 17, a spherical protective cover 18, a fixed shell 19, a power connector 20 and a data connector 21.

[0104] It should be noted that the power management module 1, the signal processing circuit 2, the azimuth motor drive circuit 3, the data output circuit 4, the azimuth absolute encoder 5, the azimuth brushless DC motor 6 and the stator of the conductive slip ring 7 are all installed in the fixed housing 19; the data fusion processing circuit 8, the attitude sensor circuit 9, the pitch motor drive circuit 10, the laser drive circuit 11, the pitch hollow shaft motor 12, the pitch absolute encoder 16 and the rotor of the conductive slip ring 7 are all installed in the U-shaped pan-tilt bracket 17; the high-definition global shutter camera 13, the laser emission component 14 and the through-window snapshot camera 15 are installed in the spherical protective cover 18; the stator of the azimuth absolute encoder 5 is fixedly connected to the stator of the azimuth brushless DC motor 6, and is fixedly connected to the fixed housing 19; the rotor of the azimuth absolute encoder 5, the rotor of the azimuth brushless DC motor 6, and the rotor of the conductive slip ring 7 are coaxially fixedly connected to the U-shaped pan-tilt bracket 17, and the axis is set in a vertical state; the spherical protective cover 18 is set on the U-shaped pan-tilt bracket 17 The stator of the pitch hollow shaft motor 12 is fixedly connected to the right arm of the U-shaped pan-tilt bracket 17, and the rotor of the pitch hollow shaft motor 12 is fixedly connected to the right side of the spherical protective cover 18, and the stator of the pitch hollow shaft motor 12, the rotor of the pitch hollow shaft motor 12, the two side arms of the U-shaped pan-tilt bracket 17 and the spherical protective cover 18 are in the same azimuth axis; the stator of the pitch absolute encoder 16 is fixedly connected to the left arm of the U-shaped pan-tilt bracket 17, and the pitch absolute encoder 1 6 is fixedly connected to the left side of the spherical protective cover 18, and the stator of the pitch absolute encoder 16, the rotor of the pitch absolute encoder 16, the two side arms of the U-shaped pan-tilt bracket 17 and the spherical protective cover 18 have the same azimuth axis; the global shutter camera 13, the laser emission component 14 and the through-window snapshot camera 15 are evenly distributed on the spherical protective cover 18 and have the same azimuth axis as the two side arms of the U-shaped pan-tilt bracket 17, and the sagittal plane of the laser emission component 14 is parallel to the vertical center axis of the U-shaped pan-tilt bracket 17.

[0105] The input end of the power management module 1 is connected to the power supply connector 20 through a flexible silicone wire, the first output end of the power management module 1 is connected to the circuit board A through a flexible silicone wire, the second output end of the power management module 1 is connected to the stator cable of the conductive slip ring 7, and then connected to the circuit board B through the rotor cable of the conductive slip ring 7;

[0106] The signal processing circuit 2, the azimuth motor drive circuit 3, and the data output circuit 4 are all located on the circuit board A; the azimuth absolute encoder 5 is connected to the signal processing circuit 2 through a flexible silicone wire; the azimuth motor drive circuit 3 is connected to the signal processing circuit 2 through on-board wiring, and is connected to the azimuth brushless DC motor 6 through a flexible silicone wire; the signal processing circuit 2 is connected to the stator wiring of the conductive slip ring 7, and is then connected to the data fusion processing circuit 8 through the rotor wiring of the conductive slip ring 7; the signal processing circuit 2 is also connected to the data output circuit 4 through on-board wiring; the data output circuit 4 is connected to the data connector 21 through a gigabit network cable.

[0107] The data fusion processing circuit 8, the attitude sensor circuit 9, the pitch motor drive circuit 10, and the laser drive circuit 11 are all located on the circuit board B; the attitude sensor circuit 9 is connected to the data fusion processing circuit 8 through on-board wiring; the pitch absolute encoder 16 is connected to the data fusion processing circuit 8 through a flexible silicone wire; the data fusion processing circuit 8 is connected to the pitch motor drive circuit 10 through on-board wiring; the pitch motor drive circuit 10 is connected to the pitch hollow shaft motor 12 through a flexible silicone wire; the data fusion processing circuit 8 is connected to the laser drive circuit 11 through on-board wiring; the laser drive circuit 11 is connected to the laser emission component 14 through a flexible silicone wire; the data fusion processing circuit 8 is also connected to the global shutter camera 13 through a gigabit network cable; the data fusion processing circuit 8 is also connected to the through-window snapshot camera 15 through a gigabit network cable.

[0108] The power connector 20 and the data connector 21 are embedded in the side wall of the fixed housing 19 by means of through-the-wall installation, and the waterproof grade reaches IP67.

[0109] like Figure 4 As shown, the laser emission component 14 includes an emission window 14.3 embedded in the side wall of the spherical protective cover 18, and a laser 14.1 and a laser shaping and emission optical system 14.2 arranged in the spherical protective cover 18; the input end of the laser 14.1 is connected to the output end of the laser driving circuit 11 for emitting infrared laser; the laser shaping and emission optical system 14.2 is arranged at the emission end of the laser 14.1, and its focal plane coincides with the emission surface of the laser 14.1, and is used to shape and expand the infrared laser and modulate it into polarized light, and then pass it through the emission window 14.3 to the object to be photographed.

[0110] like Figure 5As shown, the through-window snapshot camera 15 includes a receiving window 15.1 embedded on the side wall of the spherical protective cover 18, and a receiving optical system 15.2, a microlens array 15.3 and a CMOS image sensor module 15.4 arranged in the spherical protective cover 18; the receiving end of the receiving optical system 15.2 corresponds to the receiving window 15.1, and is used to receive the laser reflected by the object to be photographed and converge it; the CMOS image sensor module 15.4 is arranged at the exit end of the receiving optical system 15.2, and its photosensitive surface coincides with the best phase surface of the receiving optical system 15.2, and is used for imaging and transmitting the corresponding image information to the data fusion processing circuit 8; the microlens array 15.3 is arranged on the optical path between the receiving optical system 15.2 and the CMOS image sensor module 15.4, and is used to filter polarized light.

[0111] The laser emission component 14 designed in the present invention meets the Class II safety level to avoid damage to human eyes. Other optical components and electronic devices meet the use requirements of -40℃~+85℃; the designed mechanical structure, optical interface, cable and connector adopt good waterproof and sealing treatment, and the whole machine can reach IP67 waterproof level, which can meet the requirements of long-term outdoor use.

[0112] The specific working process is as follows:

[0113] S1. Install the device on the top of the patrol car, connect the external DC power supply (DC 24V±6V) to the power connector 20 of the device through a cable, and connect the external police test terminal computer to the data connector 21 of the device through a gigabit network cable;

[0114] S2: The device is powered on, and the power management module 1 completes the voltage conversion and distribution work, providing the 3.3V, 5V and 12V required by the circuit board A and the circuit board B; and starts the self-test work, including the following contents:

[0115] A. The signal processing circuit 2 controls the azimuth motor driving circuit 3 to drive the azimuth brushless DC motor 6 to drive the U-shaped pan / tilt bracket 17 to complete a 0° to 360° rotation, and reads the angle value output by the azimuth absolute encoder 5 to detect whether it is continuous and correct. If the detection result is correct, the signal processing circuit 2 sends a self-test instruction to the data fusion processing circuit 8 through the conductive slip ring 7;

[0116] B. The data fusion processing circuit 8 controls the pitch motor driving circuit 10 to drive the pitch hollow shaft motor 12 to drive the spherical protective cover 18 to complete the ±45° movement, reads the output angle value of the pitch absolute encoder 16, and detects whether it is continuous and correct;

[0117] C. The data fusion processing circuit 8 sends a capture instruction to the global shutter camera 13, and collects the vehicle external feature image captured by the global shutter camera 13 to determine whether it works normally;

[0118] D. The data fusion processing circuit 8 sends a capture instruction to the through-window capture camera 15 and collects the image captured by the global shutter camera 13 to determine whether it is working normally;

[0119] E. After the data fusion processing circuit 8 completes the pitch motion and the detection of the global shutter camera 13 and the through-window snapshot camera 15, the output of the laser driving circuit 11 is prohibited, the exposure of the global shutter camera 13 and the through-window snapshot camera 15 is turned off, and the detection pass mark is transmitted to the signal processing circuit 2 through the conductive slip ring 7;

[0120] F. If the self-test work performed by the signal processing circuit 2 and the data fusion processing circuit 8 is normal, the signal processing circuit 2 sends the normal device information to the external police test terminal computer through the data output circuit 4 and then through the data connector 21; if any of the self-test work is abnormal, the device abnormal information is sent to the external police test terminal computer;

[0121] S3, after the self-test is finished, the external police test terminal computer sends the azimuth rotation angle and pitch angle adjustment angle information to the imaging device through the Gigabit network cable and the data connector 21 according to the actual driving road conditions (height of the patrol police car, lane width, etc.), so as to ensure that the captured vehicle can fill the shooting field of view during patrol detection;

[0122] S4, after receiving the adjustment information through the data output circuit 4, the signal processing circuit 2 controls the azimuth motor driving circuit 3 to drive the azimuth brushless DC motor 6 to drive the U-shaped pan / tilt bracket 17 to perform azimuth rotation movement, reads the azimuth absolute encoder 5 to complete closed-loop control to achieve azimuth rotation angle adjustment, and sends the pitch angle adjustment information to the data fusion processing circuit 8 through the conductive slip ring 7; the data fusion processing circuit 8 controls the pitch motor driving circuit 10 to drive the pitch hollow shaft motor 12 to drive the spherical protective cover 18 to perform pitch movement, and reads the pitch absolute encoder 16 to complete closed-loop control to achieve pitch angle adjustment;

[0123] S5. After the adjustment is completed, the external police test terminal computer sends a start test instruction to the device via the Gigabit network cable and the data connector 21 of the device;

[0124] S6, after receiving the start test instruction through the data output circuit 4, the signal processing circuit 2 sends the start test instruction to the data fusion processing circuit 8 through the conductive slip ring 7;

[0125] S7, after receiving the start test instruction, the data fusion processing circuit 8 enables the exposure function of the high-definition global shutter camera 13 and waits for the vehicle to enter the shooting field of view;

[0126] S8: After the vehicle enters the field of view of the high-definition global shutter camera 13, exposure is automatically triggered. The exposure time is fixed at 1ms, the frame transfer time is fixed at 20ms, and 10 external feature images G1, G2...G are continuously taken. 10 and sent to the data fusion processing circuit 8 via a gigabit network cable;

[0127] S9, when the data fusion processing circuit 8 receives the external feature image G1, it continuously reads the pitch angle fluctuation amount A output by the attitude sensor circuit 9 when the patrol car is driving. 11 , A 12 , A 13 and acceleration fluctuation a 11 、a 12 、a 13 ,like Figure 5 As shown, the arithmetic mean values ​​ΔA1 and Δa1 are calculated respectively, and the calculation formula is as follows:

[0128]

[0129] The data fusion processing circuit 8 controls the pitch motor driving circuit 10 to drive the pitch hollow shaft motor 12 to drive the spherical protective cover 18 to perform reverse pitch compensation movement, the compensation amount is ΔA1, and reads the angle data of the pitch absolute encoder 16 in real time to determine whether the compensation is completed;

[0130] S10, when the data fusion processing circuit 8 receives the external feature image G2, it completes the reverse pitch compensation movement of ΔA2 and the calculation of Δa2 according to the method of S9, and then compares and calculates the absolute value difference of the two arithmetic mean values ​​ΔE=|Δa1-Δa2|, thereby obtaining the laser illumination time coefficient K:

[0131]

[0132] The system sets the default basic timing of laser illumination to T=1ms, and the current laser illumination time is t=T*K.

[0133] S11, the data fusion processing circuit 8 enables the laser driving circuit 11 to output, and at the same time enables the through-window snapshot camera 15 to start exposure;

[0134] S12, the laser driving circuit 11 works in a constant current mode, and instantly releases a current greater than 5A within the duration of the pulse width, driving the laser output component 14 to emit near-infrared polarized light to the object to be photographed, the laser lighting time is t, the laser band used is 850nm±10nm, and the average power is ≤5mW;

[0135] S13. The divergence angle of the laser diode (i.e., laser 14.1) in the laser emission component 14 is usually no greater than ±15°, which cannot meet the illumination requirements for close-range photography. After passing through the optical system shaping and beam expansion system 14.2 of the laser emission component 14, the laser divergence angle is no less than ±30°, and is modulated into polarized light of a specific polarization state, which is directed toward the side of the vehicle through the emission window 14.3, penetrates the side window of the vehicle, illuminates the interior of the vehicle, and reflects;

[0136] S14, after the reflected polarized light, natural light, natural reflected light, etc. inside the vehicle pass through the receiving window of the through-window capture camera 15, only the infrared light in the 780-1000nm band is retained to enter the camera receiving field of view;

[0137] S15, a microlens array 15.3 is installed between the CMOS image sensor module 15.4 of the through-window snapshot camera 15 and its receiving window 15.1, which filters out polarized light in four directions related only to the polarization state of the modulated laser, further removing interfering light. The through-window snapshot camera 15 is exposed 4 times in succession, and each exposure time is 1 / 4t;

[0138] S16, the data fusion processing circuit 8 establishes a Stokes vector model with the four polarization images to restore the information image P1 of the polarized light in the vehicle. The mathematical model of each pixel point is as follows:

[0139]

[0140] Where S0 represents the total intensity of the reflected light; S1 represents the difference in light intensity between the 0° and 90° polarization components; S2 represents the difference in light intensity between the 45° and 135° polarization components; S3 represents the right-handed circularly polarized light component; E x and E y They represent the vector amplitude of the light vector along the x-axis and y-axis respectively. The x-axis and y-axis are orthogonal to the direction of light propagation. δ represents the phase difference between the electric field components of the x-axis and the y-axis.

[0141] S17, repeat S9 to S16 to obtain 9 information images P2 ... P9;

[0142] S18, the data fusion processing circuit 8 combines the 10 external feature images G1 to G2 captured by the high-definition global shutter camera 13 10 and 9 through-window snapshot cameras 15 capture 9 information images P1 to P9, respectively marked with time information tags, and then transmitted to the signal processing circuit 2 through the conductive slip ring 7;

[0143] S19: After receiving all the images, the signal processing circuit 2 selects the external feature images G1 to G 103 images are selected from the information images P1 to P9 that can clearly identify the front license plate number of the captured vehicle, the complete vehicle model on the side of the vehicle, and the rear license plate number of the vehicle; and 2 images are selected from the information images P1 to P9 that can clearly identify the situation inside the vehicle observed from the front windshield window and the situation inside the vehicle observed from the side of the vehicle;

[0144] S20, the signal processing circuit 2 sends the 5 selected image data to the external police test terminal computer through the data connector 21 after completing the data level conversion through the data output circuit 4;

[0145] S21. When a new vehicle enters the shooting field of the high-definition global shutter camera 13, steps S8 to S20 are repeated to capture the vehicle on the road.

[0146] After actual road tests, the success rate of capturing the in-vehicle riding environment is greater than 80%. It can clearly determine whether the number of passengers in the car is overcrowded, whether there is a mix of passengers and cargo, and whether the front and rear passengers are wearing seat belts as required, providing a new and effective technical means for monitoring traffic safety.

[0147] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An integrated portable infrared window capture imaging device, characterized in that: It comprises a rotating platform and a collection unit, a driving unit, a processing unit and a laser emission component (14) arranged on the rotating platform; The rotating platform is used to drive the acquisition unit to perform azimuth rotation and pitch rotation; The acquisition unit is used to acquire the image of the object to be photographed, the azimuth rotation angle and the pitch rotation angle of the rotating stage, and the pitch inclination fluctuation amount and the acceleration fluctuation amount of the entire device; The driving unit is used to drive the rotating table and the collecting unit to work; The processing unit is connected to the acquisition unit and the driving unit respectively, and is used to process images, azimuth rotation angles and pitch rotation angles, pitch inclination fluctuations and acceleration fluctuations, and drive the driving unit to perform corresponding work based on the processing results; The laser emission component (14) is connected to the driving unit and is used to send near-infrared band polarized light to the object to be photographed when the acquisition unit is working.

2. The integrated portable infrared window capture imaging device according to claim 1 is characterized in that: The acquisition unit comprises an absolute azimuth encoder (5), an absolute pitch encoder (16), a posture sensor circuit (9), a global shutter camera (13), and a through-window snapshot camera (15), all of which are connected to the drive unit; The azimuth absolute encoder (5) is used to collect the azimuth rotation angle of the rotating table and send it to the processing unit; The pitch absolute encoder (16) is used to collect the pitch rotation angle of the rotating platform and send it to the processing unit; The attitude sensor circuit (9) is used to collect the pitch angle fluctuation and acceleration fluctuation of the entire device and send them to the processing unit; The global shutter camera (13) is used to collect external feature images of the object to be photographed and send them to the processing unit; The through-window snapshot camera (15) is used to collect the internal feature image of the object to be photographed and send it to the processing unit.

3. The integrated portable infrared window capture imaging device according to claim 2 is characterized in that: The rotating platform comprises a U-shaped pan / tilt bracket (17), a spherical protective cover (18), and a fixed shell (19); The U-shaped pan / tilt bracket (17) is mounted on the top of the fixed housing (19), with its U-shaped opening facing upwards; The spherical protective cover (18) is installed at the U-shaped opening of the U-shaped pan / tilt bracket (17), and the global shutter camera (13), the laser emission component (14) and the through-window snapshot camera (15) are all installed in the spherical protective cover (18); The drive unit comprises a power management module (1), an azimuth motor drive circuit (3), an azimuth brushless DC motor (6), a pitch motor drive circuit (10), a laser drive circuit (11) and a pitch hollow shaft motor (12); The power management module (1) is arranged in a fixed housing (19), an input end of which is connected to a power supply connector (20) embedded in a side wall of the fixed housing (19), a first output end of which is connected to a circuit board A, and a second output end of which is connected to a circuit board B via a conductive slip ring (7); The circuit board B is installed in the U-shaped pan / tilt bracket (17); The conductive slip ring (7) is arranged between the fixed housing (19) and the U-shaped pan / tilt bracket (17) and is used to realize corresponding electrical connection when the fixed housing (19) and the U-shaped pan / tilt bracket (17) rotate relative to each other; The azimuth motor drive circuit (3) is arranged on the circuit board A, its input end is connected to the processing unit, and its output end is connected to the input end of the azimuth brushless DC motor (6); The azimuth brushless DC motor (6) is arranged in a fixed housing (19), the stator of which is fixedly connected to the fixed housing (19), and the upper end of the rotor of which passes through the center of the conductive slip ring (7) and is connected to the U-shaped pan-tilt bracket (17) to drive the rotating table to rotate in azimuth; the azimuth absolute encoder (5) is installed at the lower end of the rotor of the azimuth brushless DC motor (6); The stator of the conductive slip ring (7) is sleeved on the rotor of the azimuth brushless DC motor (6) and is fixedly connected to the fixed housing (19); the rotor of the conductive slip ring (7) is fixedly sleeved on the rotor of the azimuth brushless DC motor (6) and is fixedly connected to the U-shaped pan / tilt bracket (17); The pitch motor drive circuit (10) is arranged on a circuit board B, an input end of which is connected to a processing unit, and an output end of which is connected to an input end of a pitch hollow shaft motor (12); The laser driving circuit (11) is arranged on a circuit board B, an input end of which is connected to a processing unit, and an output end of which is connected to a laser emitting component (14); The pitch hollow shaft motor (12) is arranged on a side wall of the U-shaped pan / tilt bracket (17), and its output end is connected to the spherical protective cover (18) to drive the spherical protective cover (18) to rotate, so as to realize the pitch rotation of the rotating platform; The pitch absolute encoder (16) is arranged on the other side wall of the U-shaped pan / tilt bracket (17), the input end of which is connected to the spherical protective cover (18), and the output end of which is connected to the processing unit; The connection points of the pitch absolute encoder (16), the pitch hollow shaft motor (12) and the spherical protective cover (18) are located on the same diameter thereof; The posture sensor circuit (9) is mounted on a circuit board B.

4. The integrated portable infrared window capture imaging device according to claim 3 is characterized in that: The processing unit comprises a signal processing circuit (2) and a data fusion processing circuit (8); The signal processing circuit (2) is arranged on the circuit board A, and is respectively connected to the output end of the azimuth absolute encoder (5) and the input end of the azimuth motor drive circuit (3), and is also connected to the data fusion processing circuit (8) through a conductive slip ring (7), and is also connected to the data connector (21) embedded in the side wall of the fixed housing (19) through a data output circuit (4) arranged on the circuit board A; The data fusion processing circuit (8) is arranged on a circuit board B and is respectively connected to an output end of a posture sensor circuit (9), an output end of a pitch absolute encoder (16), an input / output end of a global shutter camera (13), an input / output end of a through-window snapshot camera (15), an input end of a pitch motor drive circuit (10), and an input end of a laser drive circuit (11).

5. The integrated portable infrared window capture imaging device according to claim 4 is characterized in that: The laser emission assembly (14) comprises an emission window (14.3) embedded in the side wall of the spherical protective cover (18), and a laser (14.1) and a laser shaping and emission optical system (14.2) arranged in the spherical protective cover (18); The input end of the laser (14.1) is connected to the output end of the laser driving circuit (11) and is used to emit infrared laser; The laser shaping and emission optical system (14.2) is arranged at the emission end of the laser (14.1), and its focal plane coincides with the emission surface of the laser (14.1). It is used to shape and expand the infrared laser beam and modulate it into polarized light, which is then transmitted to the object to be photographed through the emission window (14.3).

6. The integrated portable infrared window capture imaging device according to claim 5 is characterized in that: The through-window snapshot camera (15) comprises a receiving window (15.1) embedded in the side wall of the spherical protective cover (18), and a receiving optical system (15.2), a microlens array (15.3) and a CMOS image sensor module (15.4) arranged in the spherical protective cover (18); The receiving end of the receiving optical system (15.2) corresponds to the receiving window (15.1) and is used to receive and converge the laser light reflected by the object to be photographed; The CMOS image sensor module (15.4) is arranged at the exit end of the receiving optical system (15.2), and its photosensitive surface coincides with the optimal phase plane of the receiving optical system (15.2), and is used for imaging and transmitting corresponding image information to the data fusion processing circuit (8); The microlens array (15.3) is arranged on the optical path between the receiving optical system (15.2) and the CMOS image sensor module (15.4) and is used for screening polarized light.

7. An integrable portable infrared through-window snapshot imaging method, using the integrable portable infrared through-window snapshot imaging device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: The acquisition unit sequentially acquires external feature images G1, G2, ... G N , N ≥ 2, and continuously collect the pitch angle fluctuation A of the entire device 11 , A 12 , A 13 …A 1M and acceleration fluctuation a 11 、a 12 、a 13 …a 1J , M ≥ 2, J ≥ 2, sent to the processing unit; Step 2: The processing unit receives the external feature image G1 and reads the pitch angle fluctuation amount A 12 , A 13 …A 1m and acceleration fluctuation a 11 、a 12 …a 1j , 1≤m≤M, 1≤j≤J, calculate the average value and Pitch angle fluctuation A 12 , A 13 …A 1m and acceleration fluctuation a 11 、a 12 …a 1j All are data received by the processing unit before receiving the next external feature image G2; Step 3: The driving unit drives the rotating stage to perform reverse pitch compensation rotation movement, and the compensation amount is ΔA1; Step 4: The processing unit receives the external feature image G2, obtains the arithmetic mean values ​​ΔA2 and Δa2 using the method in step 2, and calculates the absolute value difference ΔE between two adjacent arithmetic mean values ​​= |Δa1-Δa2|, thereby calculating the illumination time t of the current laser emission component (14): t=T*K Wherein, T is the basic timing of the laser emission component (14), is the laser illumination time coefficient; Step 5: The driving unit drives the rotating stage to perform reverse pitch compensation rotation movement, with a compensation amount of ΔA2; and drives the laser emission component (14) to send near-infrared polarized light to the object to be photographed, with an illumination time of t; Step 6: When the object to be photographed is irradiated with polarized light in the near-infrared band, the acquisition unit continuously acquires X internal characteristic images of the object to be photographed, where X is a multiple of 4 and a positive integer; Step 7: The processing unit establishes a Stokes vector model based on the X internal feature images to restore the information image P1 of the internal polarized light of the object to be photographed; Step 8: Use the method of steps 4-7 to process the external feature images G3...G N , obtain Y information images P2…P Y , Y = N-1; complete the infrared window capture imaging, the image includes external feature images G1, G2...G N and information image P2…P Y .

8. The integrated portable infrared window capture imaging method according to claim 7, characterized in that: Step 1 is as follows: The global shutter camera (13) sequentially collects external characteristic images G1, G2, ... G N The attitude sensor circuit (9) continuously collects the pitch angle fluctuation amount A of the imaging device. 11 , A 12 , A 13 …A 1M and acceleration fluctuation a 11 、a 12 、a 13 …a 1J , sent to the data fusion processing circuit (8); Step 2 is as follows: The data fusion processing circuit (8) receives the external characteristic image G1 and reads the pitch angle fluctuation amount A 12 , A 13 …A 1m and acceleration fluctuation a 11 、a 12 …a 1j , calculate the average and 9. The integrated portable infrared window capture imaging method according to claim 8, characterized in that: Step 3 is as follows: The data fusion processing circuit (8) drives the pitch hollow shaft motor (12) through the pitch motor driving circuit (10) to drive the spherical protective cover (18) to perform reverse pitch compensation rotation movement, and the compensation amount is ΔA1; Step 4 is as follows: The data fusion processing circuit (8) receives the external feature image G2, obtains the arithmetic mean values ​​ΔA2 and Δa2 using the method in step 2, and calculates the absolute value difference ΔE=|Δa1-Δa2| between two adjacent arithmetic mean values, thereby calculating the illumination time t=T*K of the current laser emission component (14); Step 5 is as follows: The data fusion processing circuit (8) drives the pitch hollow shaft motor (12) through the pitch motor driving circuit (10) to drive the spherical protective cover (18) to perform reverse pitch compensation rotation movement, and the compensation amount is ΔA2; and drives the laser emission component (14) to send near-infrared band polarized light to the object to be photographed, the illumination time is t, and the laser band used is the near-infrared band.

10. The integrated portable infrared window capture imaging method according to claim 9, characterized in that: Step 6 is as follows: When the through-window snapshot camera (15) irradiates the object to be photographed with polarized light in the near-infrared band, it continuously exposes the object four times, with each exposure time being 1 / 4t, to obtain four internal feature images of the object to be photographed; Step 7 is as follows: The data fusion processing circuit (8) establishes a Stokes vector model based on the four internal feature images, and restores the information image P1 of the internal polarized light of the object to be photographed.

Images