CN104519258A - Foreground camera module of VTM machine and shooting method of foreground camera module - Google Patents
Foreground camera module of VTM machine and shooting method of foreground camera module Download PDFInfo
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- CN104519258A CN104519258A CN201410834784.8A CN201410834784A CN104519258A CN 104519258 A CN104519258 A CN 104519258A CN 201410834784 A CN201410834784 A CN 201410834784A CN 104519258 A CN104519258 A CN 104519258A
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Abstract
The invention discloses a foreground camera module of a VTM (virtual teller machine) machine. The foreground camera module comprises a first PCB (printed circuit board) and a second PCB which are arranged in parallel up and down, a lens, two digital microphones, a CMOS (complementary metal oxide semiconductor) image sensor, a DSP (digital signal processor) micro processor, a connector and an output interface. The invention also discloses a shooting method of the foreground camera module of the VTM machine. The shooting method comprises the steps: the CMOS image sensor is used for converting a light signal and an audio signal into a digital image signal; the DSP micro processor performs digital signal processing and encoding so as to carry out normal exposure or automatic backlight compensation control in real time according to the environmental brightness; when detecting backlight, the DSP micro processor starts to carry out backlight compensation processing so as to finish foreground shooting and remote monitoring. By adoption of a backlight compensation technology, the defect that a picture main body shot by a camera is dark under a backlight environment is effectively overcome, and high-quality image output is realized; the requirements on safety protection monitoring of the VTM machine and human-machine interaction can be met.
Description
Technical field
The present invention relates to technique for taking field, particularly a kind of VTM machine prospect camera module and image pickup method thereof.
Background technology
VTM machine (long-range wisdom bank) is a kind of remote financial Possum, and it can replace bank counter to perform financial service, and it can realize man-machine interaction, and this needs a large amount of human-computer interaction module, and wherein photographing module is widely used.
Existing ATM photographing module function singleness, limited in one's ability for reversible-light shooting, pickup quality is not high, can not meet the instructions for use of VTM machine, bring inconvenience to remote monitoring.Carry out understanding to disclosed prior art to excavate, all do not disclose a kind of image pickup method of VTM machine prospect camera module at present both at home and abroad.
Summary of the invention
For the deficiencies in the prior art, the object of the invention is to, provide a kind of can prospect shooting, can compensate, effectively make up the defect of shooting picture dark under backlight, the VTM machine prospect camera module of high-definition camera can be exported by automatic backlight under backlight environment.
Another object of the present invention is to, the image pickup method of aforementioned VTM machine prospect camera module is provided.
The present invention for the adopted technical scheme that achieves the above object is:
A kind of VTM machine prospect camera module, it comprises the first pcb board and the second pcb board, a camera lens, Double-number microphone, cmos image sensor, DSP microprocessor and connector, output interface that be arranged in parallel up and down, described camera lens, Double-number microphone, cmos image sensor are integrated on the first pcb board, described DSP microprocessor, connector, output interface are integrated on the second pcb board, and described DSP microprocessor can carry out audio frequency, image procossing and automatic backlight compensatory control.
Described Double-number microphone is symmetrically arranged MEMS miniature silicon Double-number microphone.
Described cmos image sensor is large-size images transducer.
An image pickup method for aforesaid VTM machine prospect camera module, it comprises the steps:
(1) by a camera lens by convergence of rays on cmos image sensor, change light signal into data image signal, simultaneously cmos image sensor can Real-Time Monitoring output brightness signal;
(2) digital audio and video signals is obtained by Double-number microphone;
(3) by DSP microprocessor, data image signal and digital audio and video signals are carried out audio frequency, image procossing; Meanwhile, when being in home or backlight environment, DSP microprocessor can carry out normal exposure or automatic backlight compensatory control according to ambient brightness in real time, after change picture signal into through cmos image sensor, then carry out picture signal process by DSP microprocessor;
(4) the high definition image obtained after (3) process is outputted on VTM main frame by output interface, thus the prospect that can complete is taken, is realized remote monitoring.
Wherein, in described step (3), the process of automatic backlight compensatory control is as follows:
(31) just the beginning and end open BLC, and when described DSP microprocessor detects backlight, DSP microprocessor starts BLC process;
(32) picture is divided into several regions by nine grids form, carries out brightness detection respectively;
(33) carry out brightness enhancing for central object, and can not affect by background luminance;
(34) BLC is realized.
Described DSP microprocessor carries out automatic backlight compensatory control, and be the QDHE algorithm adopting the brightness of band BLC to keep, by carrying out the lifting of global contrast to the gray-scale map obtained, to export high definition image, it specifically comprises the steps:
Adopt the histogram of method to the gray-scale map obtained of the highlighted histogram part of compression to process, and then obtain pending gray-scale map;
The histogram of every sub regions will be calculated behind pending gray-scale map zoning;
After the histogram of dynami c block division method to every sub regions adopting band thresholding to shear processes, the histogram of every sub regions carries out independently histogram equalization respectively, and then obtains the gray-scale map of global contrast lifting.
Described cmos image sensor is large-size images transducer; Wherein large-size images transducer, can be 1.5CMOS, size sensor 18.7*14.0mm, or EXR cmos, size sensor 2/3 inch, large-sized imageing sensor, as the configuration of 1.5 inch of 1,400 ten thousand pixel, ensure that lower picture element density, can avoid interfering with each other of each pixel to greatest extent, large-sized imageing sensor brings high image quality performance.
Described Double-number microphone is MEMS miniature silicon Double-number microphone.
MEMS micro silicon microphone adopts bias voltage operation principle forever, without the need to storing charge, can tolerate the humiture of surrounding enviroment, and product sensitivity is stablized, and adopts Double-number microphone, perfect can realize the function such as elimination, echo cancellor, speech recognition of background noise.
Compared with prior art, tool has the following advantages in the present invention:
1, VTM machine prospect camera module of the present invention adopts large-size images transducer, carries out the recording of 1080P HD video, adopts Double-number microphone, and lossless audio is recorded; Adopt DSP microprocessor to carry out audio frequency, image procossing, automatic backlight compensatory control, realize 1080P high definition image output,
2, the image pickup method of VTM machine camera module of the present invention, the method that employing prospect is taken also carrys out control chart image brightness by the software light filling of setting, meet the high-definition camera under different lightness environment, it applies the technology of BLC uniquely, effectively make up the defect of picture main body dark when video camera is taken under backlight environment, realize high-quality image output, the requirement of VTM machine safety monitoring, man-machine interaction can be met.
Above-mentioned is the general introduction of invention technical scheme, and below in conjunction with accompanying drawing and embodiment, the present invention will be further described.
Accompanying drawing explanation
Fig. 1 is the overall schematic of camera module of the present invention;
Fig. 2 is the second pcb board schematic diagram of camera module of the present invention;
In figure: 1, the first pcb board; 2, the second pcb board; 3, microphone; 4, cmos image sensor; 5, DSP microprocessor; 6, camera lens; 7, connector; 8, output interface;
Fig. 3 is the overall flow figure of camera module image pickup method of the present invention;
Fig. 4 is the local flow chart of camera module image pickup method of the present invention.
Embodiment:
See Fig. 1-4, the VTM machine prospect camera module that the present embodiment provides, it comprises the first pcb board 1 and the second pcb board 2, camera lens 6, Double-number microphone 3, cmos image sensor 4, DSP microprocessor 5 and connector 7, the output interface 8 be arranged in parallel up and down, described camera lens 6, Double-number microphone 3, cmos image sensor 4 are integrated in the first described pcb board 1, and described DSP microprocessor 5, connector 7, output interface 8 are integrated in the second described pcb board 2; Described cmos image sensor 4 is large-size images transducer; Described Double-number microphone 3 is symmetrically arranged MEMS miniature silicon Double-number microphone; Described DSP microprocessor 5 is encoded arrange after can carry out audio frequency, image procossing and automatic backlight compensatory control.
An image pickup method for aforesaid VTM machine prospect camera module, it comprises the steps:
(1) by a camera lens by convergence of rays on cmos image sensor, change light signal into data image signal, simultaneously cmos image sensor can Real-Time Monitoring output brightness signal;
(2) digital audio and video signals is obtained by Double-number microphone;
(3) by DSP microprocessor, data image signal and digital audio and video signals are carried out audio frequency, image procossing; Meanwhile, when being in home or backlight environment, DSP microprocessor can carry out normal exposure or automatic backlight compensatory control according to ambient brightness in real time, after change picture signal into through cmos image sensor, then carry out picture signal process by DSP microprocessor;
(4) the high definition image obtained after (3) process is outputted on VTM main frame by output interface, thus the prospect that can complete is taken, is realized remote monitoring.
Wherein, in described step (3), the process of automatic backlight compensatory control is as follows:
(31) just the beginning and end open BLC, and when described DSP microprocessor detects backlight, DSP microprocessor starts BLC process;
(32) picture is divided into several regions by nine grids form, carries out brightness detection respectively;
(33) carry out brightness enhancing for central object, and can not affect by background luminance;
(34) BLC is realized.
Described DSP microprocessor carries out automatic backlight compensatory control, and be the QDHE algorithm adopting the brightness of band BLC to keep, by carrying out the lifting of global contrast to the gray-scale map obtained, to export high definition image, it specifically comprises the steps:
Adopt the histogram of method to the gray-scale map obtained of the highlighted histogram part of compression to process, and then obtain pending gray-scale map;
The histogram of every sub regions will be calculated behind pending gray-scale map zoning;
After the histogram of dynami c block division method to every sub regions adopting band thresholding to shear processes, the histogram of every sub regions carries out independently histogram equalization respectively, and then obtains the gray-scale map of global contrast lifting.
VTM machine prospect camera module of the present invention adopts large-size images transducer, Double-number microphone, adopts DSP microprocessor to carry out audio frequency, image procossing, automatic backlight compensatory control, realizes 1080P high definition image output; Its method adopting prospect to take also carrys out control chart image brightness by the software light filling of setting, meet the high-definition camera under different lightness environment, it applies the technology of BLC uniquely, effectively make up the defect of picture main body dark when video camera is taken under backlight environment, realize high-quality image output, the requirement of VTM machine safety monitoring, man-machine interaction can be met.
The present invention is not limited to above-mentioned execution mode, adopts structure, the method identical or approximate with the above embodiment of the present invention, and other VTM machine prospect camera module and image pickup methods thereof of obtaining, all within scope.
Claims (7)
1. a VTM machine prospect camera module, it is characterized in that, comprise the first pcb board and the second pcb board, a camera lens, Double-number microphone, cmos image sensor, DSP microprocessor and connector, output interface that be arranged in parallel up and down, described camera lens, Double-number microphone, cmos image sensor are integrated on the first pcb board, described DSP microprocessor, connector, output interface are integrated on the second pcb board, and described DSP microprocessor can carry out audio frequency, image procossing and automatic backlight compensatory control.
2. VTM machine prospect camera module according to claim 1, is characterized in that, described Double-number microphone is symmetrically arranged MEMS miniature silicon Double-number microphone.
3. VTM machine prospect camera module according to claim 1, it is characterized in that, described cmos image sensor is large-size images transducer.
4. adopt an image pickup method for the VTM machine prospect camera module described in claim 1-3, it is characterized in that, comprise the steps:
(1) by a camera lens by convergence of rays on cmos image sensor, change light signal into data image signal, simultaneously cmos image sensor can Real-Time Monitoring output brightness signal;
(2) digital audio and video signals is obtained by Double-number microphone;
(3) by DSP microprocessor, data image signal and digital audio and video signals are carried out audio frequency, image procossing; Meanwhile, when being in home or backlight environment, DSP microprocessor can carry out normal exposure or automatic backlight compensatory control according to ambient brightness in real time, after change picture signal into through cmos image sensor, then carry out picture signal process by DSP microprocessor;
(4) the high definition image obtained after (3) process is outputted on VTM main frame by output interface, thus the prospect that can complete is taken, is realized remote monitoring.
5. the image pickup method of VTM machine prospect camera module according to claim 4, is characterized in that, in described step (3), the process of automatic backlight compensatory control is as follows:
(31) just the beginning and end open BLC, and when described DSP microprocessor detects backlight, DSP microprocessor starts BLC process;
(32) picture is divided into several regions by nine grids form, carries out brightness detection respectively;
(33) carry out brightness enhancing for central object, and can not affect by background luminance;
(34) BLC is realized.
6. the image pickup method of VTM machine prospect camera module according to claim 4, it is characterized in that, described cmos image sensor is large-size images transducer; Described Double-number microphone is MEMS miniature silicon Double-number microphone.
7. the image pickup method of VTM machine prospect camera module according to claim 4, it is characterized in that, described DSP microprocessor carries out automatic backlight compensatory control, it is the QDHE algorithm adopting the brightness of band BLC to keep, by carrying out the lifting of global contrast to the gray-scale map obtained, to export high definition image, it specifically comprises the steps:
Adopt the histogram of method to the gray-scale map obtained of the highlighted histogram part of compression to process, and then obtain pending gray-scale map;
The histogram of every sub regions will be calculated behind pending gray-scale map zoning;
After the histogram of dynami c block division method to every sub regions adopting band thresholding to shear processes, the histogram of every sub regions carries out independently histogram equalization respectively, and then obtains the gray-scale map of global contrast lifting.
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| CN201410834784.8A CN104519258A (en) | 2014-12-26 | 2014-12-26 | Foreground camera module of VTM machine and shooting method of foreground camera module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110248109A (en) * | 2019-06-28 | 2019-09-17 | 深圳市长龙鑫电子有限公司 | A kind of image-forming information processing method, system and storage medium |
| CN113141469A (en) * | 2021-04-21 | 2021-07-20 | 东莞市水利勘测设计院有限公司 | Anti-reflection method, system and device for night observation water gauge and readable storage medium |
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| WO2010056215A1 (en) * | 2008-11-12 | 2010-05-20 | Fintek Finansal Teknoloji Hizmetleri Anonim Sirketi | An apparatus that makes banking transactions by video conferencing and a method thereof |
| CN102722871A (en) * | 2012-05-24 | 2012-10-10 | 中山大学 | Quick and effective image enhancing method |
| CN202721740U (en) * | 2012-06-21 | 2013-02-06 | 无锡鸿图微电子技术有限公司 | Automatic exposure compensation device of backlight type scenes in video imaging system |
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| CN2791764Y (en) * | 2005-03-30 | 2006-06-28 | 郭仲益 | Safty protection device for ATM money-drawing machine |
| CN1658657A (en) * | 2005-04-05 | 2005-08-24 | 北京中星微电子有限公司 | Method and device for backlighting automatic detection and compensation |
| WO2010056215A1 (en) * | 2008-11-12 | 2010-05-20 | Fintek Finansal Teknoloji Hizmetleri Anonim Sirketi | An apparatus that makes banking transactions by video conferencing and a method thereof |
| CN102722871A (en) * | 2012-05-24 | 2012-10-10 | 中山大学 | Quick and effective image enhancing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110248109A (en) * | 2019-06-28 | 2019-09-17 | 深圳市长龙鑫电子有限公司 | A kind of image-forming information processing method, system and storage medium |
| CN113141469A (en) * | 2021-04-21 | 2021-07-20 | 东莞市水利勘测设计院有限公司 | Anti-reflection method, system and device for night observation water gauge and readable storage medium |
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