CN114143507A

CN114143507A - Image acquisition system

Info

Publication number: CN114143507A
Application number: CN202111430853.5A
Authority: CN
Inventors: 赵梦姣; 税永胜
Original assignee: Shaanxi Nuobexi Technology Co ltd
Current assignee: Shaanxi Nuobexi Technology Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-03-04

Abstract

The invention discloses an image acquisition system, which comprises a DVR server and a camera component, wherein the input end of the DVR server is electrically connected with the output end of an IRIG-B code generator, one side of the DVR server is fixedly provided with a third interface, the DVR server is electrically connected with a high-performance workstation through the third interface, one side of the DVR server is provided with the interface component, the interface component comprises a first interface component and a second interface component, and the first interface component and the second interface component are both electrically connected with the camera component through a cable component, and the image acquisition system has the beneficial effects that: the DVR server is added to provide a programmable interface, the performance testing software can call the programmable interface to realize the functions of mode selection, photographing, video starting stop and the like of the remote control acquisition equipment, high working efficiency is realized, and the first camera and the second camera are added and both provided with two CXP-6 interfaces, so that the data transmission efficiency is improved.

Description

Image acquisition system

Technical Field

The invention relates to the technical field of image acquisition, in particular to an image acquisition system.

Background

The image information is one of the most important information acquired by human beings, the image acquisition is widely applied in the fields of digital image processing, image identification and the like, the acquisition and processing of real-time images play an important role in modern multimedia technology, the real-time image acquisition is a core technology in products such as digital cameras, video phones, multimedia IP phones, teleconferences and the like seen in daily life, and the speed and quality of the image acquisition directly influence the overall effect of the products;

however, the existing image acquisition system has short storage time during acquisition, and the existing image acquisition system has low data transmission speed, which affects the working efficiency.

Disclosure of Invention

The present invention is directed to an image capturing system to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme: an image acquisition system comprises a DVR server and a camera assembly, wherein the input end of the DVR server is electrically connected with the output end of an IRIG-B code generator, one side of the DVR server is provided with a fixed third interface, the DVR server is electrically connected with a high-performance workstation through the third interface, one side of the DVR server is provided with the interface assembly, the interface assembly comprises a first interface assembly and a second interface assembly, the first interface assembly and the second interface assembly are both electrically connected with the camera assembly through a cable assembly, the camera assembly comprises a first camera and a second camera, a hard disk is installed in the DVR server, and a programmable interface is fixedly installed on one side of the DVR server;

the camera assembly comprises a high-speed camera and a lens, the lens is mounted on the high-speed camera, and two camera access ports are fixedly mounted at the bottom of the high-speed camera;

the cable subassembly includes CXP-6 cable and BNC interface, the one end fixed mounting that the interface subassembly was kept away from to CXP-6 cable has the BNC interface, BNC interface and camera access mouth electric connection.

Preferably, No. one interface module includes a CXP interface and No. two CXP interfaces, No. two interface modules include No. three CXP interfaces and No. four CXP interfaces, a CXP interface, No. two CXP interfaces, No. three CXP interfaces and No. four CXP interfaces all with DVR server fixed mounting, a CXP interface and No. two CXP interfaces pass through the cable subassembly and are connected with a camera, No. three CXP interfaces and No. four CXP interfaces pass through the cable subassembly and are connected with No. two cameras.

Preferably, the DVR server is provided with six hard disks, the hard disks are VIDOMOD480G, and the total capacity of the six hard disks is 2.88 TB.

Preferably, the model of the lens is ZEISSPLANAR1.4/50MF-mount, the model of the high-speed camera is 12M180CCX-F, and the high-speed camera is connected with the lens through an F-mount interface.

Preferably, the IRIG-B code generator input signal is connected to a junction box through a DB9 interface, and the junction box is internally connected to a time service card.

Preferably, one side of the DVR server is fixedly provided with an eSATA interface, and the eSATA interface is electrically connected with a USB3.0 interface of the high-performance workstation through a USB3.0-eSATA adapter.

Preferably, the first camera and the second camera are both mounted on a tripod, and the tripod is arranged at 2.7m right in front of the screen of the system to be tested.

Preferably, the inside of the high-speed camera is provided with a camera target surface, and when the focal length is 50mm, the placing position of the camera can be calculated according to the following formula:

where f is the focal length, WD is the object distance, Cv and Ch are the length and width of the camera target surface, FOV is the field of view, and V and H are the length and width of the field of view.

Preferably, a polarizer is arranged below the lens, and a photographed screen is arranged right below the polarizer.

Compared with the prior art, the invention has the beneficial effects that: the DVR server is added to provide a programmable interface, the performance testing software can call the programmable interface to realize the functions of mode selection, photographing, video starting stop and the like of the remote control acquisition equipment, high working efficiency is realized, a first camera and a second camera are added, the first camera and the second camera are both provided with two CXP-6 interfaces, each interface supports 6.25Gb/s data rate, the highest 1192MB/s data transmission rate supported by each camera is realized, and the data transmission efficiency is improved.

Drawings

FIG. 1 is a diagram of the image data acquisition hardware design connection of the present invention;

FIG. 2 is a schematic view of the image capture principle of the present invention;

FIG. 3 is a schematic diagram of a light source design according to the present invention.

In the figure: 1. a DVR server; 2. an interface component; 21. a CXP one interface; 22. a CXP second interface; 3. an interface component II; 31. a CXP number three interface; 32. a CXP number four interface; 4. a cable assembly; 41. a CXP-6 cable; 42. a BNC interface; 5. a camera assembly; 51. a camera access port; 52. a high-speed camera; 53. a lens; 6. a hard disk; 7. interface three; 8. a high performance workstation; 9. an IRIG-B code generator; 10. a camera target surface; 11. a screen to be photographed; 12. a polarizer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an image acquisition system comprises a DVR server 1 and a camera assembly 5, wherein the input end of the DVR server 1 is electrically connected with the output end of an IRIG-B code generator 9, one side of the DVR server 1 is fixedly provided with a third interface 7, the DVR server 1 is electrically connected with a high-performance workstation 8 through the third interface 7, one side of the DVR server 1 is provided with the interface assembly, the interface assembly comprises a first interface assembly 2 and a second interface assembly 3, the first interface assembly 2 and the second interface assembly 3 are both electrically connected with the camera assembly 5 through a cable assembly 4, the camera assembly 5 comprises a first camera and a second camera, a hard disk 6 is arranged in the DVR server 1, and one side of the DVR server 1 is fixedly provided with a programmable interface;

the camera assembly 5 comprises a high-speed camera 52 and a lens 53, wherein the lens 53 is mounted on the high-speed camera 52, and two camera inlets 51 are fixedly mounted at the bottom of the high-speed camera 52;

the cable assembly 4 comprises a CXP-6 cable 41 and a BNC interface 42, the BNC interface 42 is fixedly installed at one end, far away from the interface assembly, of the CXP-6 cable 41, the BNC interface 42 is electrically connected with the camera access port 51, the DVR server 1 can provide a programmable interface conveniently, the performance test software can call the programmable interface to realize the functions of mode selection, photographing, starting to stop videos and the like of the remote control acquisition equipment, and the working efficiency is improved.

The first interface component 2 comprises a first CXP interface 21 and a second CXP interface 22, the second interface component 3 comprises a third CXP interface 31 and a fourth CXP interface 32, the first CXP interface 21, the second CXP interface 22, the third CXP interface 31 and the fourth CXP interface 32 are fixedly installed with the DVR server 1, the first CXP interface 21 and the second CXP interface 22 are connected with the first camera through the cable component 4, the third CXP interface 31 and the fourth CXP interface 32 are connected with the second camera through the cable component 4, the first CXP interface 21, the second CXP interface 22, the third CXP interface 31 and the fourth CXP interface 32 are convenient for improving the data transmission efficiency, the DVR server 1 is provided with six hard disks 6, the hard disk 6 is VIDOMODOMA 480G, the total capacity of the six hard disks 6 is 2.88TB, the hard disks 6 can continuously store 22 minutes of image data, the storage efficiency is improved, the model number of the lens 53 is ISSParmoM 1.4/MF 50-unin-50, the model of the high-speed camera 52 is 12M180CCX-F, the high-speed camera 52 is connected with the lens 53 through an F-mount interface, the high-speed camera 52 is conveniently matched with the lens 53 better, the stability is improved, an input signal of the IRIG-B code generator 9 is connected with a junction box through a DB9 interface, a time service card is connected inside the junction box, the safety of image acquisition is improved, one side of the DVR server 1 is fixedly provided with an eSATA interface, the eSATA interface is electrically connected with a USB3.0 interface of the high-performance workstation 8 through a USB3.0-eSATA adapter, the stronger information processing function of the high-performance workstation 8 and the high-performance graphics, image processing function and networking function are utilized, the acquisition efficiency is improved, the first camera and the second camera are both arranged on a tripod, and the tripod is arranged right 2.7M away from the screen of a system to be detected, the tripod is convenient for fixing the first camera and the second camera in front, the inside of the high-speed camera 52 is provided with a camera target surface 10, and when the focal length is 50mm, the camera placing position can be calculated according to the following formula:

wherein f is the focus, WD is the object distance, Cv and Ch are the length and width of camera target surface 10, FOV is the field of view, V and H are the length and width of field of view, select the pixel position of the screen of shooing at the camera target surface through the register that sets up camera subassembly 5, be equipped with polarizer 12 below camera lens 53, be equipped with under polarizer 12 and be shot screen 11, the interference light of the polarizer 12 filtering reflection of being convenient for.

Specifically, when the present invention is used, 2 CXP-6 interfaces are configured for each camera, each interface supports 6.25Gb/s data rate, each camera supports a highest 1192MB/s data transmission rate, a required picture resolution for transmission is 1024x1000, a pixel resolution is 8 bits, 1000 pictures are taken every second, plus 1% redundancy, a data transmission rate requirement is 1.01 x 1024 1000 x 1/1048576 x986.33 MB/s, a CXP-6 interface meets an image transmission requirement, a receiving capability is that a highest data receiving rate of an image processing system is 2240MB/s, an actual requirement for receiving is 2x986.33 x 1972.66MB/s, if the receiving rate is 1972.66MB/s, 6 blocks of solid state hard disk 6 need to be configured, if the requirement is 10min, a capacity of each block of 6 hard disk is at least 193Gb, and thus a capacity of hard disk 6 is selected as Gb 480, the 6 blocks 480GB (447.1 GB active capacity) solid state disk 6 can store 22 minutes of image data continuously, the high speed camera 52 takes a 15 inch screen of the subject, the screen size is about 300mm by 300mm, and the picture resolution requirement is 1024 by 1000. The highest resolution of the selected high-speed camera 52 is 4096 × 3072, each pixel size is 5.5 μm × 5.5 μm, the size of the largest camera target 10 is 22.5mm × 16.9mm (diagonal 28.1mm), and when the photographing resolution is set to 1024 × 1000, the size of the camera target 10 is 5.6mm × 5.5mm according to the camera photographing principle. Therefore, the selected largest camera target surface 10 of the lens 53 supports 43mm, which is larger than the camera target surface 10, so that the requirement is met, and when the focal length is 50mm, the camera placing position can be calculated according to the following formula:

wherein f is cokeDistance, WD is an object distance, Cv and Ch are a length and a width of the camera target surface 10, FOV is a field of view, V and H are a length and a width of the field of view, f is 50mm, Cv is 5.6mm and V is 300mm when photographing resolution is 1024 × 1000, WD is 2678mm and is about 2700mm, object distance is 2700mm and photographing field of view is about 1200mm × 900mm, according to the camera imaging principle, as long as the maximum field of view covers the photographed screen 11, a pixel position of the photographed screen 11 on the camera target surface 10 may be selected by a register provided with the camera assembly 5 to form an image result of 1024 × 1000, uncertainty of a brightness and a brightness of a room illumination power supply of the installation apparatus and a degree of natural light cannot be controlled, and thus an additional light source and a shadow mask need to be considered when designing the image capturing system, a photographed object is a screen, and the screen may cause an unclear image when photographing, in order to improve the shooting effect and the image contrast, the polarizer 12 is used for filtering reflected interference light, and the light source is used for increasing illumination, wherein the brightness of the light source is adjustable and can be adjusted in real time according to the illumination condition of a laboratory.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An image acquisition system is characterized by comprising a DVR server (1) and a camera component (5), wherein the input end of the DVR server (1) is electrically connected with the output end of an IRIG-B code generator (9), one side of the DVR server (1) is provided with a third interface (7) in a fixed mounting mode, the DVR server (1) is electrically connected with a high-performance workstation (8) through the third interface (7), one side of the DVR server (1) is provided with the interface component which comprises a first interface component (2) and a second interface component (3), the first interface component (2) and the second interface component (3) are both electrically connected with the camera component (5) through a cable component (4), the camera component (5) comprises a first camera and a second camera, and a hard disk (6) is arranged inside the DVR server (1), a programmable interface is fixedly installed on one side of the DVR server (1);

the camera assembly (5) comprises a high-speed camera (52) and a lens (53), the lens (53) is mounted on the high-speed camera (52), and two camera access ports (51) are fixedly mounted at the bottom of the high-speed camera (52);

cable subassembly (4) include CXP-6 cable (41) and BNC interface (42), CXP-6 cable (41) are kept away from the one end fixed mounting of interface subassembly and are had BNC interface (42), BNC interface (42) and camera access mouth (51) electric connection.

2. An image acquisition system according to claim 1, characterized in that: no. one interface module (2) includes a CXP interface (21) and No. two CXP interfaces (22), No. two interface module (3) include No. three CXP interfaces (31) and No. four CXP interfaces (32), a CXP interface (21), No. two CXP interfaces (22), No. three CXP interfaces (31) and No. four CXP interfaces (32) all with DVR server (1) fixed mounting, a CXP interface (21) and No. two CXP interfaces (22) are connected with a camera through cable subassembly (4), No. three CXP interfaces (31) and No. four CXP interfaces (32) are connected with No. two cameras through cable subassembly (4).

3. An image acquisition system according to claim 1, characterized in that: six hard disks (6) are installed on the DVR server (1), the hard disks (6) are VIDODMOD 480G, and the total capacity of the six hard disks (6) is 2.88 TB.

4. An image acquisition system according to claim 1, characterized in that: the model of the lens (53) is ZEISSPLANAR1.4/50MF-mount, the model of the high-speed camera (52) is 12M180CCX-F, and the high-speed camera (52) is connected with the lens (53) through an F-mount interface.

5. An image acquisition system according to claim 1, characterized in that: an input signal of the IRIG-B code generator (9) is connected with a junction box through a DB9 interface, and a time service card is connected inside the junction box.

6. An image acquisition system according to claim 1, characterized in that: one side of the DVR server (1) is fixedly provided with an eSATA interface, and the eSATA interface is electrically connected with a USB3.0 interface of the high-performance workstation (8) through a USB3.0-eSATA adapter.

7. An image acquisition system according to claim 1, characterized in that: the first camera and the second camera are both mounted on a tripod, and the tripod is arranged at a position 2.7m in front of a screen of the system to be measured.

8. An image acquisition system according to claim 1, characterized in that: the inside of high-speed camera (52) is equipped with camera target surface (10), when the focus is 50mm, can calculate the camera and put the position according to following formula:

where f is the focal length, WD is the object distance, Cv and Ch are the length and width of the camera target surface (10), FOV is the field of view, and V and H are the length and width of the field of view.

9. An image acquisition system according to claim 1, characterized in that: a polarizer (12) is arranged below the lens (53), and a photographed screen (11) is arranged right below the polarizer (12).