CN201846415U

CN201846415U - Face recognition device with double collaborative cameras

Info

Publication number: CN201846415U
Application number: CN2010206200831U
Authority: CN
Inventors: 杨军
Original assignee: Hanwang Technology Co Ltd
Current assignee: Hanwang Technology Co Ltd
Priority date: 2010-11-23
Filing date: 2010-11-23
Publication date: 2011-05-25
Anticipated expiration: 2020-11-23

Abstract

The utility model belongs to the field of face recognition, and relates to a face recognition device with double collaborative cameras. The face recognition device comprises an embedded processor, a camera data bus, a data select switch, a control signal and state signal select switch, a first camera and a second camera, wherein the embedded processor is provided with a camera control interface and an I/O interface; the embedded processor is connected with the data select switch through the camera data bus; the data select switch is connected with the first camera and the second camera respectively; the camera control interface of the embedded processor is connected with the control signal and state signal select switch; the control signal and state signal select switch is connected with the first camera and the second camera respectively; and the I/O interface of the embedded processor is connected with the data select switch and the control signal and state signal select switch respectively. The face recognition device with double collaborative cameras realizes the data switch of the two cameras and optimizes the hardware configuration and the function realization of a system.

Description

The face identification device of dual camera collaborative work

Technical field

The utility model belongs to the recognition of face field, relates to a kind of face identification device of dual camera collaborative work.

Background technology

Recognition of face is a pith of living things feature recognition.In recent years, face recognition products has obtained in fields such as company's work attendance, safety system and monitoring widely to use, recognition of face than the other biological feature identification have directly perceived, convenient, healthy, reliability is high and plurality of advantages such as friendly.In face identification device, the design of dual camera is widely adopted, when adopting dual camera to carry out recognition of face, primary processor adopts digital signal processor DSP and flush bonding processor such as arm processor to realize mostly at present, this class processor possesses two or more utilizing camera interfaces a bit, yet the hardware resource that needs is more, causes cost higher.Some processor then only has a utilizing camera interface, and to reduce cost, power consumption, still this method data user rate is low, and the function singleness that is possessed.Therefore, how to make between the processor that has only single utilizing camera interface and the dual camera to connect, and by the work of control dual camera to realize that recognition of face is present urgent problem.

The utility model content

The utility model is for solving the technical problem of utilizing the processor with single camera interface to connect dual camera, a kind of face identification device of dual camera collaborative work is provided, comprise have the camera data-interface, flush bonding processor, data select switch, control signal and status signal selector switch, first camera and second camera of camera control interface and I/O interface, wherein, flush bonding processor connects data select switch by the camera data/address bus, and data select switch is connected with second camera with first camera respectively; The camera control interface of flush bonding processor is connected with the status signal selector switch with control signal, and control signal is connected with second camera with first camera respectively with the status signal selector switch; The I/O interface of flush bonding processor is connected with data select switch, control signal and status signal selector switch respectively.

Wherein, described data select switch and control signal and status signal selector switch use data to select chip to realize.

Wherein, described data select switch and control signal and status signal selector switch pass through switch controlling signal alternately gating first camera and second camera.

Wherein, control the asynchronous of described first camera and the second camera initial data by chip selection signal.

Face identification device by a kind of dual camera collaborative work of the present utility model utilizes data select switch to realize the data switching of two cameras, not only saved hardware resource, and realized the colored echo of camera data and black and white image comparison simultaneously, make system hardware configuration, function realize and the data utilization on reach optimum.

Description of drawings

Fig. 1 is a kind of flush bonding processor of face identification device of dual camera collaborative work of embodiment of the present utility model and the johning knot composition of dual camera;

Fig. 2 is that the face identification device of a kind of dual camera collaborative work of embodiment of the present utility model adopts the circuit connection diagram of 74HC157 chip as electronic switch;

Fig. 3 is that the dual camera data of face identification device of a kind of dual camera collaborative work of embodiment of the present utility model are switched schematic diagram.

Embodiment

Describe the face identification device of a kind of dual camera collaborative work of the present utility model in detail below in conjunction with the drawings and specific embodiments.

Below to adopt the positive JZ4740 processor of monarch as embedded processor platform, adopt the 74HC157 chip be either-or switch core assembly sheet as embodiment, specify the face identification device of a kind of dual camera collaborative work of the present utility model.

Fig. 1 is a kind of flush bonding processor of face identification device of dual camera collaborative work of embodiment of the present utility model and the johning knot composition of dual camera.As shown in Figure 1, the face identification device of a kind of dual camera collaborative work of the present utility model comprise have the camera data-interface, flush bonding processor, data select switch, control signal and status signal selector switch, first camera and second camera of camera control interface and I/O interface, wherein, flush bonding processor connects data select switch by the camera data-interface, data select switch connects first camera and second camera again, and the data of first camera and second camera collection are gathered and transmitted.The camera control interface of flush bonding processor is connected with the status signal selector switch with control signal, control signal is connected with second camera with first camera respectively with the status signal selector switch, and first camera and second camera are carried out the reception and the transmission of control signal and status signal.The I/O interface of flush bonding processor comes gating first camera or second camera by switch controlling signal control data selector switch and control signal and status signal selector switch.

Fig. 2 is that the face identification device of a kind of dual camera collaborative work of embodiment of the present utility model adopts the circuit connection diagram of 74HC157 chip as electronic switch.As shown in Figure 2, flush bonding processor adopts the positive JZ4740 processor platform of monarch, and the 74HC157 chip is the data select switch that two group of four line imported one group of four line output.Data select switch is made of two 74HC157 chips, is selected by switch controlling signal SELECT control identical on the flush bonding processor I/O interface.In addition, data select switch also can realize by the programmable logic device by CPLD, has cost height, problem that power consumption is big but compare with the 74HC157 chip.

As shown in Figure 2, VDA[0:7] be the data wire of first camera, VDB[0:7] be the data wire of second camera, data select switch among Fig. 1 is made of U15 and two 74HC157 chips of U16, the A of U15 end A1 ~ A4 connects VDA[0:7] low four VDA0 ~ VDA3, B end B1 ~ B4 of U15 connects VDB[0:7] hang down four VDB0 ~ VDB3.The A of U16 end A1 ~ A4 connects VDA[0:7] high four VDA4 ~ VDA7, the B of U16 holds B1 ~ B4 to connect VDB[0:7] high four VDB4 ~ VDB7.On low four of the camera data/address bus of the output Y1 of U15 ~ Y4 connection flush bonding processor JZ4740, be CIM_D0 ~ CIM_D3, output Y1 ~ Y4 of U16 is connected to camera data/address bus high four of JZ4740, be CIM_D4 ~ CIM_D7, CIM_D0 ~ CIM_D7 has constituted 8 bit data of camera jointly.The 16th pin of U15 and U16 is power pins, meets the power supply VCC that is generally 3.3V.The 8th pin ground connection of U15 and U16.The 1st pin of U15 and U16 is switch controlling signal pin SELECT, connects the IO interface pin CIM_SELECT of JZ4740 processor.The 15th pin of U15 and U16 is the STROBE enable signal, chip operation during low level, so ground connection.Camera data selection course is, when the CIM_SELECT of JZ4740 output low level, the input A end of U15, U16 all links to each other with output Y end, promptly the data on data wire this moment are the data of first camera, when CIM_SELECT output high level, the input B end of U15, U16 all links to each other with output Y end, also is that the data on data wire this moment are the data of second camera.

Control signal among Fig. 1 and status signal selector switch are made of U17 and two 74HC157 of U18.Output HREF, the VSYNC of U17 and PCLK are respectively the synchronizing signal of camera horizontal direction, the synchronizing signal of camera vertical direction and the frame synchronizing signal of camera.Pin A1, the A2 of U17 and A3 are connected HREF0, VSYNC0 and the PCLK0 of first camera respectively, and pin B1, the B2 of U17, B3 connect HREF1, VSYNC1 and the PCLK1 of second camera respectively.When the switch controlling signal SELECT of U17 was low level, status signal HREF0, the VSYNC0 of first camera were connected flush bonding processor with PCLK0.When the switch controlling signal SELECT of U17 was high level, status signal HREF1, the VSYNC1 of second camera were connected flush bonding processor with PCLK1.

The pin I2C_SCK of flush bonding processor JZ4740 connects pin A1 and the B2 of U18, output Y1 connects the serial port clock cable I2C_SCK_A of first camera, output Y2 connects the serial port clock cable I2C_SCK_B of second camera, when switch controlling signal SELECT when low, I2C_SCK links to each other with first camera, for it provides the clock signal of serial port, as SELECT when being high, I2C_SCK links to each other with second camera, for it provides the clock signal of serial port.The 74HC157 pin of chip A2 of U18 and B1 guarantee that respectively by 2.2K Ω resistance R 95 and R96 ground connection output Y1, Y2 do not disturb mutually.

Fig. 3 is that the dual camera data of face identification device of a kind of dual camera collaborative work of embodiment of the present utility model are switched schematic diagram.In the present embodiment, the data of first camera are the black and white image behind the collection infrared light filtering visible light, are used for subsequent treatment and compare with the face template data of flush bonding processor storage, and the data of second camera are used for the echo colorized face images.The speed of first camera and the second camera collection image is per second 30 frame image datas, and the data structure of two cameras is identical.Transfer of data between flush bonding processor and the camera is that unit carries out with the frame, is sign with a frame synchronizing signal VSYNC all when frame begins and finishes.

As shown in Figure 3, at first by switch controlling signal gating first camera and flush bonding processor, make first frame data of the camera of winning effective when its beginning frame synchronizing signal VSYNC is sent to flush bonding processor like this, flush bonding processor begins to receive first frame data of first camera.When flush bonding processor received the frame synchronizing signal VSYNC at the next first frame data end from first camera, first frame data of first camera had transmitted and have finished.At this moment, by switch controlling signal gating second camera and flush bonding processor, flush bonding processor is waited for and is received the beginning frame synchronizing signal VSYNC of the next one from second frame data of second camera, when the beginning frame synchronizing signal VSYNC of second frame data of second camera arrived flush bonding processor, flush bonding processor began to receive second frame data of second camera.When flush bonding processor receives the frame synchronizing signal VSYNC at the second frame data end of second camera, the second frame end of transmission of second camera.At this moment, again by switch controlling signal gating first camera and flush bonding processor, flush bonding processor is waited for the beginning frame synchronizing signal VSYNC of the next one from the 4th frame data of first camera, when the beginning frame synchronizing signal VSYNC of the 4th frame data of first camera arrives flush bonding processor, flush bonding processor begins to receive the 4th frame data of first camera, and the rest may be inferred.Hence one can see that, under optimal situation, per 30 frame data have 10 frames to be embedded into the formula processor to receive comparison as the black and white facial image in the first camera data, and per 30 frame data have 10 frame data to be embedded into the formula processor to receive and be used for the colored echo of people's face in the second camera data.Therefore, this optimal situation requires the initial data of the initial data of second camera and first camera asynchronous, realizes by the chip selection signal of controlling first camera and second camera.

Should be appreciated that abovely to have been described in detail that more than explanation is illustrative and not restrictive by preferred embodiment the technical solution of the utility model of the present utility model.Those of ordinary skill in the art can make amendment to the technical scheme that each embodiment put down in writing on the basis of reading the utility model specification, perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.Protection range of the present utility model is only limited by the claims of enclosing.

Claims

1. the face identification device of a dual camera collaborative work, it is characterized in that, comprise have the camera data-interface, flush bonding processor, data select switch, control signal and status signal selector switch, first camera and second camera of camera control interface and I/O interface, wherein

Flush bonding processor connects data select switch by the camera data/address bus, and data select switch is connected with second camera with first camera respectively;

The camera control interface of flush bonding processor is connected with the status signal selector switch with control signal, and control signal is connected with second camera with first camera respectively with the status signal selector switch;

The I/O interface of flush bonding processor is connected with data select switch, control signal and status signal selector switch respectively.

2. the face identification device of dual camera collaborative work according to claim 1 is characterized in that, described data select switch and control signal and status signal selector switch use data to select chip to realize.

3. the face identification device of dual camera collaborative work according to claim 1 is characterized in that, described data select switch and control signal and status signal selector switch pass through switch controlling signal alternately gating first camera and second camera.

4. the face identification device of a kind of dual camera collaborative work according to claim 1 is characterized in that, controls the asynchronous of described first camera and the second camera initial data by chip selection signal.