CN212992427U

CN212992427U - Image acquisition module

Info

Publication number: CN212992427U
Application number: CN202022125156.6U
Authority: CN
Inventors: 郭志; 汪晓伟; 伍拂宏; 杨国星
Original assignee: Shenzhen Fugesys Co ltd
Current assignee: Shenzhen Fugesys Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-04-16
Anticipated expiration: 2030-09-24

Abstract

The utility model discloses an image acquisition module, including support, 3D module, IR camera, RGB camera and two data lines, the 3D module includes TOF sensor and transmitting laser, four mounting holes have from left to right been seted up on the support, RGB camera, IR camera, TOF sensor and transmitting laser install four in proper order in the mounting hole, two the one end of one in the data line is stretched into in the support with the TOF sensor with the transmitting laser electricity is connected, two another one end in the data line is stretched into in the support with IR camera and RGB camera electricity are connected. The utility model installs the 3D module, the IR camera and the RGB camera in the bracket, which can meet the requirement of using the cameras of three different light wave frequency bands to collect light under different light environments, so as to realize clear image collection; meanwhile, the structure miniaturization is realized through a reasonable discharge and high integration mode.

Description

Image acquisition module

Technical Field

The utility model relates to an image acquisition module belongs to image acquisition technical field.

Background

The existing near-distance face recognition field, such as the fields of intelligent locks, access control attendance, barriers, near-distance face tracking holders and the like, needs to use an optical acquisition device to acquire clear and real face images. However, because the face image acquisition is limited by the influence of various factors such as light intensity, illumination angle and the like in various environments, the quality of the acquired images is different, which directly influences the face recognition passing rate and the anti-counterfeiting effect at the rear end; meanwhile, different implementation modes are adopted to meet different structural requirements on the acquisition device, and further, a great deal of limitation is caused on the application of each subdivision field.

At present, the image acquisition principle mainly comprises monocular acquisition, binocular acquisition, structured light acquisition and TOF (time of flight ranging) acquisition. The monocular acquisition adopts a single RGB camera to acquire images, and is greatly influenced by ambient light, so the monocular acquisition is gradually eliminated in the field of practical application; the binocular acquisition calibration is a basic and key step for realizing stereoscopic vision. Usually, a calibration method of a single camera is firstly adopted to respectively obtain the internal and external parameters of two cameras, and then the position relationship between the two cameras is established through a group of calibration points in the same world coordinate. The accuracy of the structure is therefore highly demanding. The distance and the viewing angle of the other two cameras are limited, and the measurement range is proportional to the base line (the distance between the two cameras), so that the miniaturization cannot be realized. Greatly limiting its range of application. Structured light is collected, light with certain structural characteristics is projected to a shot object through an infrared laser, reflected structured light patterns are collected through a special infrared camera, and depth information is calculated according to a triangulation principle. Structured light solutions are not well suited outdoors because the projected encoded image or speckle spot is easily swamped by intense natural light outdoors. Meanwhile, the problem that the binocular structure light collection is also in direct proportion to a measurement range and a base line (the distance between two cameras), so that the device cannot be miniaturized is solved. And in the TOF acquisition, modulated light pulses are transmitted through an infrared transmitter, the reflected light pulses are received by a receiver after encountering the reflection of an object, and the distance between the receiver and the object is calculated according to the round trip time of the light pulses. Because each pixel point received by the ToF receiving sensor corresponds to the actual position of the surface of an object, the depth can be obtained by a phase solution method as long as the reflected light comes back. The measurement accuracy of the device does not decrease with the increase of the measurement distance, and the measurement error of the device is basically fixed in the whole measurement range. Moreover, since sunlight is not modulated, it can be simply considered as having no influence on the phase, so ToF has certain robustness to outdoor strong light environment. In the aspect of resolution, the resolution of a depth camera adopting the ToF technology is still low at present, and the identification precision is poor.

Above-mentioned image acquisition can not satisfy various light service environment when using alone, and this leads to whole image acquisition module can not gather clear image.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome not enough that prior art exists, provide an image acquisition module.

The utility model discloses can realize through taking following technical scheme:

the utility model provides an image acquisition module, includes support, 3D module, IR camera, RGB camera and two data lines, the 3D module includes TOF sensor and transmitting laser, four mounting holes have from left to right been seted up on the support, RGB camera, IR camera, TOF sensor and transmitting laser install four in proper order in the mounting hole, two the one end of one in the data line stretches into in the support with TOF sensor with the transmitting laser electricity is connected, two the one end of another in the data line stretches into in the support with IR camera and RGB camera electricity are connected.

Preferably, the TOF sensor and the emission laser are integrally fixed on a first template in the bracket, and the IR camera and the RGB camera are integrally fixed on a second template in the bracket.

Preferably, the bottom of the bracket is provided with a first through hole and a second through hole, and one end of each of the two data lines respectively penetrates through the first through hole and the second through hole and extends into the bracket.

Preferably, an image signal processing module is fixed on a data line electrically connected with the TOF sensor and the emission laser, and the image signal processing module is electrically connected with the TOF sensor and the emission laser through the data line.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model installs the 3D module, the IR camera and the RGB camera in the bracket, which can meet the requirement of using the cameras of three different light wave frequency bands to collect light under different light environments, so as to realize clear image collection; meanwhile, the structure miniaturization is realized through a reasonable discharge and high integration mode, and the secondary installation is simple and convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of the image capturing module of the present invention;

fig. 2 is an exploded view of the image capturing module according to the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, the image capturing module of this embodiment includes a support 1, a 3D module, an RGB camera 2, an IR (infrared) camera 3, and two data lines 4, the 3D module includes a TOF sensor 5 and a transmitting laser 6, four mounting holes 11 are opened on the support from left to right, the RGB camera 2, the IR camera 3, the TOF sensor 5, and the transmitting laser 6 are sequentially installed in the four mounting holes 11, one end of one of the two data lines 4 extends into the support 1 and is electrically connected to the TOF sensor 5 and the transmitting laser 6, and one end of the other of the two data lines 4 extends into the support 1 and is electrically connected to the RGB camera 2 and the IR camera 3.

In this embodiment, TOF sensor 5 with emitting laser 6 is integrated to be fixed on first template 8 in the support 1, IR camera 2 with RGB camera 3 is integrated to be fixed on second template 7 in the support 1, integrates 2D image module and 3D image module, easy to assemble and change. First through-hole 12 and second through-hole 13 have been seted up to the bottom of support 1, two the one end of data line 4 passes respectively first through-hole 12 and second through-hole 13 stretch into in the support 1, through first through-hole 12 and second through-hole 13, make things convenient for being connected of two data lines 4 and camera. An image signal processing module 9 is fixed on a data line 4 electrically connected with the TOF sensor 5 and the transmitting laser 6, the image signal processing module 9 is electrically connected with the TOF sensor 5 and the transmitting laser 6 through the data line 4, collected signals of the 3D image module can be processed through the image signal processing module 9, and dependence on high requirements of a main control chip is reduced.

The present invention has been described in connection with the preferred embodiments, but the present invention is not limited to the above disclosed embodiments, and shall cover various modifications, equivalent combinations, according to the essence of the present invention.

Claims

1. The utility model provides an image acquisition module which characterized in that: including support, 3D module, IR camera, RGB camera and two data lines, the 3D module includes TOF sensor and transmitting laser, four mounting holes have from left to right been seted up on the support, RGB camera, IR camera, TOF sensor and transmitting laser install four in proper order in the mounting hole, two the one end of one in the data line stretches into in the support with TOF sensor with transmitting laser electricity is connected, two the one end of another in the data line stretches into in the support with IR camera and RGB camera electricity are connected.

2. The image acquisition module of claim 1, wherein: the TOF sensor and the transmitting laser are integrally fixed on a first template in the support, and the IR camera and the RGB camera are integrally fixed on a second template in the support.

3. The image acquisition module of claim 1, wherein: the bottom of the support is provided with a first through hole and a second through hole, and one end of each of the two data lines penetrates through the first through hole and the second through hole respectively and extends into the support.

4. The image acquisition module according to any one of claims 1 to 3, characterized in that: and an image signal processing module is fixed on a data line electrically connected with the TOF sensor and the transmitting laser, and the image signal processing module is electrically connected with the TOF sensor and the transmitting laser through the data line.