CN100484203C - Same vision field multi-spectral video stream acquiring device and method - Google Patents
Same vision field multi-spectral video stream acquiring device and method Download PDFInfo
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- CN100484203C CN100484203C CNB2006100117487A CN200610011748A CN100484203C CN 100484203 C CN100484203 C CN 100484203C CN B2006100117487 A CNB2006100117487 A CN B2006100117487A CN 200610011748 A CN200610011748 A CN 200610011748A CN 100484203 C CN100484203 C CN 100484203C
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Abstract
The disclosed new-type acquisition device for same-view-field multi-spectrum video flow comprises: a power device, an IR light source, a camera system, and a video separation device. This invention combines PR technology to overcome light effect on the recognition system, and improves location precision greatly.
Description
Technical field
The present invention relates to electronic information, signal processing and area of pattern recognition.Be particularly related to and adopt single camera to carry out same vision field multi-spectral video stream vision signal deriving means that separates and the processing method of eliminating the influence of ambient interferences and light.
Background technology
At area of pattern recognition, the influence that complex background causes detected object always is the major reason that causes verification and measurement ratio lower.How simple and direct carry out efficiently complex background and foreground object to be detected separate and the final complex background of thoroughly eliminating is the very big but very significant problem of difficulty always.On the other hand, in the daily environment for use of reality, various environment light sources and changeable irradiate light have all been brought very large difficulty to recognition system.In order to reach best recognition effect, we must handle light.So-called light treatment technology just is meant that means such as utilizing hardware or software handle the picture or the video flowing of catching under the various different illumination conditions, reduces or eliminates illumination variation to being identified the influence of object as far as possible.
Summary of the invention
For the interference that solves complex background in the prior art and different light the problem that influences a two worlds difficult problem, the purpose of this invention is to provide a kind of simple and direct deriving means and method of eliminating the same vision field multi-spectral video stream that complex background influence in the mode identification procedure and different illumination conditions influence efficiently to object.
The inventive method is carried out different light by the field signal to video flowing and is handled obtaining fully the multi-spectral video stream with the visual field, and utilizes the characteristics of different spectrum video flowings effectively to eliminate the influence of complex background and the influence of different illumination conditions.
A first aspect of the present invention, a kind of acquisition methods of same vision field multi-spectral video stream, performing step comprises: gather video flowing in conjunction with stroboscopic active infrared light source between the field; By the field signal that extracts in the video flowing independent illumination control is carried out in the different fields of video flowing; Separating step: the video flowing that captures is carried out separating treatment, obtain complete different spectrum video flowings with the visual field.
Described separating step separates the same visual field of generation, different spectrum video flowing by the field signal that extracts in the video flowing to video flowing.
Described same visual field, different spectrum video flowing comprise: the video flowing I that comprises surround lighting and active infrared light; The video flowing II that only comprises surround lighting; Removed the video flowing III that only comprises infrared light of surround lighting and background influence.
Described same visual field, different spectrum video flowing step comprise: video flowing I and video flowing II are carried out decorrelation handle the video flowing III that only comprises the infrared light effect that obtains removing the surround lighting part, thereby removed the influence of the illumination variation in the environment to recognition system.
A second aspect of the present invention, a kind of deriving means of same vision field multi-spectral video stream comprises: supply unit, infrared light supply, camera system, video separation processing unit; Infrared light supply irradiation subject, camera system will be gathered video flowing then, camera system is connected with infrared light supply, the output of camera system is connected with the input of video separation processing unit, camera system is given the video separation processing unit with the dynamic image distribution that collects, the video separation processing unit utilizes the unlatching and the closure of the field sync signal control infrared source circuit in the video flowing, so just make the video separation processing unit receive the different video flowing of light conditions between different, carry out separating treatment then, then obtain same visual field, different spectrum video flowing.
Technical essential of the present invention is mainly reflected in the following aspects:
The deriving means of same vision field multi-spectral video stream of the present invention and light processing method adopt novelty mentality of designing cleverly, and having solved the interference of complex background and different light simultaneously influences a two worlds difficult problem to object.Its main feature is as follows:
Adopt cheap CCD camera to cooperate cheap USB video acquisition instrument, also can adopt the CMOS camera, need not video frequency collection card, video processing speed is fast, and cost is low;
Utilize single camera to obtain simultaneously and handle fully multi-spectral video stream with the visual field;
Utilize infrared light supply to carry out the interference that light filling is thoroughly eliminated background;
Eliminate the influence of different light, make system go for multiple occasion;
By merging the multi-spectral video stream that utilizes the same visual field that is obtained, improve verification and measurement ratio, discrimination and the extended capability of recognition system greatly;
The present invention adopts and video flowing I and video flowing II to be carried out decorrelation handles the video flowing III that only comprises the infrared light effect that obtains removing the surround lighting part, thereby has removed the influence of the illumination variation in the environment to recognition system.A kind of simple and direct deriving means and light processing method of eliminating the same vision field multi-spectral video stream that complex background influence in the mode identification procedure and different illumination conditions influence efficiently is provided.
Description of drawings
By the detailed description below in conjunction with accompanying drawing, above-mentioned and others, feature and advantage of the present invention will become more apparent.In the accompanying drawing:
Fig. 1 is the acquisition methods schematic diagram of same vision field multi-spectral video stream of the present invention;
Fig. 2 is the acquisition methods example schematic of same vision field multi-spectral video stream of the present invention;
Fig. 3 is the deriving means block diagram of same vision field multi-spectral video stream of the present invention;
Fig. 4 is stroboscopic active infrared circuit of light sources figure between the deriving means field of same vision field multi-spectral video stream of the present invention;
Fig. 5 is that the deriving means of same vision field multi-spectral video stream of the present invention carries out illumination effect elimination design sketch;
Fig. 6 is the acquisition methods flow chart of the invention process same vision field multi-spectral video stream.
Embodiment
Below in conjunction with accompanying drawing the present invention is specified.Be noted that described embodiment only is considered as illustrative purposes, rather than limitation of the present invention.
The acquisition methods schematic diagram of the same vision field multi-spectral video stream of Fig. 1 according to the present invention is shown in the figure: gather video flowing in conjunction with stroboscopic active infrared light source between the field; By the field signal that extracts in the video flowing independent illumination control is carried out in the different fields of video flowing; Separating step: the video flowing that captures is carried out separating treatment, obtain complete different spectrum video flowings with the visual field.
Described separating step separates the same visual field of generation, different spectrum video flowing by the field signal that extracts in the video flowing to video flowing.
Fig. 2 according to the present invention, the acquisition methods example schematic of same vision field multi-spectral video stream, shown in the figure: described same visual field, different spectrum video flowing comprise: the video flowing I that comprises surround lighting and active infrared light; The video flowing II that comprises surround lighting; Removed the video flowing III that only comprises infrared light of surround lighting and background influence.
Described same visual field, different spectrum video flowing step comprise: utilization is carried out software optical filtering processing with the video flowing I and the video flowing II of the different spectrum of visual field, obtains video flowing III.Because video flowing I comprises surround lighting part and two parts of active infrared light, and video flowing II only comprises the surround lighting part, therefore the correlation of video flowing I and video flowing II is mainly reflected in the effect aspect of surround lighting to object illumination, handle the video flowing III that only comprises the infrared light effect that obtains removing the surround lighting part by video flowing I and video flowing II being carried out decorrelation, thereby removed the influence of the illumination variation in the environment recognition system.
Fig. 3 according to the present invention, the deriving means schematic diagram of same vision field multi-spectral video stream; Shown in the figure: supply unit 1, infrared light supply 2, camera system 3, video separation processing unit 4, same vision field multi-spectral video stream 5; Wherein infrared light supply 2 and video separation processing unit 4 are by supply unit 1 power supply.Infrared source circuit 2 irradiation subjects, camera system 3 will be gathered video flowing then, camera system 3 is connected with infrared light supply 2, the output of camera system 3 is connected with the input of video separation processing unit 4, camera system 3 is given video separation processing unit 4 with the dynamic image distribution that collects, video separation processing unit 4 utilizes the unlatching and the closure of the field sync signal control infrared source circuit 2 in the video flowing, so just make video separation processing unit 4 receive the different video flowing of light conditions between different, carry out separating treatment then, then obtain same visual field, different spectrum video flowings 5.
Described supply unit 1 adopts Switching Power Supply, comprises 24 volts, 12 volts and 5 volts of direct current outputs.
A stroboscopic active infrared light source between described infrared light supply 2 adopts, being distributed according to certain rules by some point-source of lights is centered around around the camera system receiving terminal, forms area source, makes light be evenly distributed in desired region.Stroboscopic active infrared light source is the infrared-emitting diode array between infrared light supply employing field.
Described camera system 3 adopts has the camera system of visible light and infrared light sensitization.As the CCD imageing sensor is the camera of CCD or to adopt CMOS (Complementary Metal Oxide Semiconductor) conductor device imageing sensor be the camera of CMOS.
Described video separation processing unit 4: camera system adopts the CCD camera, and then video-unit adopts video acquisition instrument or video frequency collection card; Wherein video frequency collection card comprises the built-in capture card of pci interface and the external capture card of USB interface.
In order to allow the active light source of camera system illuminated target not produced visual influence, therefore adopt human eye almost find less than wavelength be positioned at the near infrared light of 800nm to 2500nm.Shown in stroboscopic active infrared circuit of light sources figure between Fig. 4 field of the present invention.Comprise among the figure:
High-power drive circuit 31, signal control valve 32, controllable duty ratio modulator 33, extensive field programmable gate array module 34 (FPGA), senior compacting instruction set processor 35 (ARM), computer interface circuit 36, infraluminescence pipe matrix 37, temperature feedback circuit 38, field sync signal module 39, video capture system 40.Original video stream is caught by video capture system 40, delivers to and carries out obtaining and synchronizing signal being delivered in the senior compacting instruction set processor 35 with video flowing of synchronizing signal in the field sync signal module 39; Senior compacting instruction set processor 35 comes from the feedback signal of temperature feedback circuit 38 and receives the brightness feedback signal that comes from computer interface circuit 36 by reception sends regulating command for controllable duty ratio modulator 33, and the result of adjusting makes ambient humidity, light and temperature meet the operate as normal requirement; Controllable duty ratio modulator 33 is when regulating, send instruction to signal control valve 32, in addition, in senior application layer, extensive field programmable gate array module 34 can receive the control command that is sended over by senior compacting instruction set processor 35 by computer interface circuit 36, thereby send instruction to signal control valve 32, signal control valve 32 can carry out control corresponding work according to the two classes instruction that receives, promptly signal to high-power drive circuit 31, thereby control infraluminescence pipe matrix 37, infraluminescence pipe matrix 37 produces the near infrared light of 800nm to 2500nm to subject.
Stroboscopic active infrared light source 2 carries out the Synchronization Control process between described, the vision signal that also comprises 4 pairs of separation of video separation processing unit is assessed, and utilize assessment result that stroboscopic infrared light supply 2 between the field and video separation processing unit 4 are carried out FEEDBACK CONTROL, assist camera system 3 and video separation processing unit 4 synchronous.
Deriving means as Fig. 5 same vision field multi-spectral video stream of the present invention carries out shown in the illumination effect elimination design sketch:
Described elimination complex background influence, adopt stroboscopic active infrared light source 2 between the field, by regulating the emission angle of stroboscopic active infrared light source 2 between the field, realization is limited to the transmitting boundary of light on the foreground object, again since background generally all with the prospect segment distance of being separated by, so exceeded the range of exposures of infrared light, like this background object in video flowing I and video flowing II all can't be by the field between stroboscopic active infrared light source irradiation arrive, therefore, make not occur object in the background among the video flowing III, thereby eliminated the influence of complex background recognition system.So, no matter be daytime or night, no matter what change environment light source has, video flowing III can not be subjected to the influence that ambient lighting changes, thereby has removed the influence of illumination variation to recognition system.
Utilize camera system 3 and gather video flowings in conjunction with stroboscopic active infrared light source between the field 2.The operation principle of stroboscopic active infrared light source 2 is exactly the opening and closing of stroboscopic active infrared light source 2 between the field sync signal controlling filed that obtains from video flowing according to video separation processing unit 4 between so-called, thereby obtain the different video flowing of light conditions between different, that is to say, a certain field at video flowing, stroboscopic active infrared light source 2 is opened between, camera system 3 will capture the video flowing that comprises the active infrared light conditions, and at another, stroboscopic active infrared light source 2 is closed between, and camera system 3 will capture the video flowing that does not contain active infrared illumination.By the video flowing that captures is carried out separating treatment, obtain three kinds of complete different spectrum video flowings 5 with the visual field.
Fig. 6 implements the acquisition methods flow chart of same vision field multi-spectral video stream according to the present invention, shown in the figure:
The enforcement of the inventive method is mainly by forming with the lower part, flow chart as shown in Figure 5:
S61 opens stroboscopic active infrared light source between the field.
S62 is according to the stroboscopic duty ratio of stroboscopic active infrared light source between the automatic key joint of the brightness of ambient lighting field.
S63 is according to the Control Parameter such as aperture size, time for exposure and white balance of the brightness regulation camera of ambient lighting.
S64 utilizes camera capturing video stream.
S65 separates video flowing.Stroboscopic active infrared light source carries out field synchronization between while and field.
S66 assesses the video stream signal that separates, and utilizes assessment result that stroboscopic infrared light supply between the field is carried out FEEDBACK CONTROL.
S67 receives two-path video stream signal simultaneously, and waits for next step processing.
S68 carries out the decorrelation processing with video flowing I and the video flowing II that receives, and obtains video flowing III.
Describing above is to be used to realize the present invention and embodiment, each step is example, those of ordinary skills can determine the actual step that will use according to actual conditions, and each step has multiple implementation method, all should belong within the scope of the present invention.Therefore, scope of the present invention should not described by this and limit.It should be appreciated by those skilled in the art,, all belong to claim of the present invention and come restricted portion in any modification or partial replacement that does not depart from the scope of the present invention.
Claims (11)
1, a kind of acquisition methods of same vision field multi-spectral video stream is gathered video flowing, it is characterized in that performing step comprises: gather video flowing in conjunction with stroboscopic active infrared light source between the field; By the field signal that extracts in the video flowing independent illumination control is carried out in the different fields of video flowing; Separating step: the video flowing that captures is carried out separating treatment, stroboscopic active infrared light source carries out field synchronization between separating treatment process and field, utilize stroboscopic active infrared light source opening and closing between the field sync signal controlling filed, when stroboscopic active infrared light source is opened between, regulate the emission angle of stroboscopic active infrared light source between the field, the transmitting boundary of light is limited on the foreground object, thereby generate same visual field, three kinds of video flowings of different spectrum are: the video flowing I that comprises surround lighting and active infrared light, only comprise the video flowing II of surround lighting and video flowing I and video flowing II are carried out decorrelation, remove surround lighting and background, only comprised infrared light video flowing III.
2, the acquisition methods of same vision field multi-spectral video stream according to claim 1, its separating step comprises:
Step S61: open stroboscopic active infrared light source between the field;
Step S62: according to the stroboscopic duty ratio of stroboscopic active infrared light source between the automatic brightness adjustment field of ambient lighting;
Step S63: according to aperture size, time for exposure and white balance and the Control Parameter of the brightness regulation camera system of ambient lighting;
Step S64: utilize camera system capturing video stream;
Step S65: video flowing is separated, and stroboscopic active infrared light source carries out field synchronization between while and field;
Step S66: the video stream signal that separates is assessed, and utilize assessment result that stroboscopic infrared light supply between the field is carried out FEEDBACK CONTROL, if the video stream signal that separates meets the requirements execution in step S67, if the video stream signal that separates is undesirable, execution in step S62;
Step S67: receive video flowing I and video flowing II signal simultaneously with the visual field;
Step S68: the video flowing I and the video flowing II that receive are carried out the decorrelation processing, obtain video flowing III.
3, the acquisition methods of same vision field multi-spectral video stream according to claim 1 is characterized in that, stroboscopic active infrared light source is the infrared-emitting diode array between.
4, a kind of deriving means of same vision field multi-spectral video stream comprises: camera system (3), and camera system (3) will be gathered video flowing, it is characterized in that, also comprise: supply unit (1), infrared light supply (2), video separation processing unit (4); Infrared light supply (2) irradiation subject, camera system (3) is connected with infrared light supply (2), the output of camera system (3) is connected with the input of video separation processing unit (4), camera system (3) is given video separation processing unit (4) with the dynamic image distribution that collects, video separation processing unit (4) utilizes the unlatching and the closure of the field sync signal control infrared light supply (2) in the video flowing, when infrared light supply is opened, regulate the emission angle of infrared light supply, the transmitting boundary of light is limited on the foreground object, make video separation processing unit (4) receive the different video flowing of light conditions between different, then different video flowings is carried out separating treatment, obtain comprising the video flowing I of surround lighting and active infrared light, the video flowing II that only comprises surround lighting; Again video flowing I and video flowing II are carried out decorrelation and obtain infrared light video flowing III, then obtain three kinds of same visual fields, different spectrum video flowing (5).
5, according to the deriving means of the described same vision field multi-spectral video stream of claim 4, it is characterized in that, infrared light supply is distributed according to certain rules by some point-source of lights and is centered around around the camera system receiving terminal, forms area source, makes light be evenly distributed in desired region.
According to the deriving means of the described same vision field multi-spectral video stream of claim 4, it is characterized in that 6, described camera system adopts has the camera system of visible light and infrared light sensitization.
According to the deriving means of the described same vision field multi-spectral video stream of claim 4, it is characterized in that 7, described camera system adopts the CCD imageing sensor, perhaps adopts CMOS (Complementary Metal Oxide Semiconductor) conductor device imageing sensor.
8, according to the deriving means of the described same vision field multi-spectral video stream of claim 4, its feature is that also described video separation processing unit adopts the video acquisition instrument, or video frequency collection card; Wherein video frequency collection card comprises the built-in capture card of pci interface and the external capture card of USB interface.
9, the deriving means of same vision field multi-spectral video stream according to claim 4 is characterized in that, infrared light supply adopts stroboscopic active infrared light source between the field.
10, the deriving means of same vision field multi-spectral video stream according to claim 4, it is characterized in that, described video separation processing unit also comprises to be assessed the vision signal of separating, and utilize assessment result that infrared light supply and video separation processing unit are carried out FEEDBACK CONTROL, assist camera system and video separation processing unit synchronous.
11, the deriving means of same vision field multi-spectral video stream according to claim 4, it is characterized in that, described infrared light supply comprises high-power drive circuit (31), signal control valve (32), controllable duty ratio modulator (33), extensive field programmable gate array module (34), senior compacting instruction set processor (35), computer interface circuit (36), infraluminescence pipe matrix (37), temperature feedback circuit (38), field sync signal module (39), video capture system (40), original video stream is caught by video capture system (40), delivers to and carries out obtaining and synchronizing signal being delivered in the senior compacting instruction set processor (35) with video flowing of synchronizing signal in the field sync signal module (39); Senior compacting instruction set processor (35) comes from the feedback signal of temperature feedback circuit (38) by reception and brightness feedback signal that reception comes from computer interface circuit (36) sends regulating command for controllable duty ratio modulator (33), and the result of adjusting makes ambient humidity, light and temperature meet the operate as normal requirement; Controllable duty ratio modulator (33) sends instruction to signal control valve (32) when regulating; In senior application layer, extensive field programmable gate array module (34) can receive the control command that is sended over by senior compacting instruction set processor (35) by computer interface circuit (36), thereby send instruction to signal control valve (32), signal control valve (32) carries out control corresponding work according to the two classes instruction that receives, promptly signal to high-power high-power drive circuit (31), thereby control infraluminescence pipe matrix (37), infraluminescence pipe matrix (37) produce near infrared light to subject.
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CN101320475B (en) * | 2008-06-10 | 2010-12-29 | 北京航空航天大学 | Operating range estimation method of infrared imaging system under complex background condition |
US20130095920A1 (en) * | 2011-10-13 | 2013-04-18 | Microsoft Corporation | Generating free viewpoint video using stereo imaging |
CN104113744B (en) * | 2013-04-18 | 2018-01-19 | 深圳中兴力维技术有限公司 | All-weather colorful video camera white balancing treatment method and device |
CN108924437A (en) * | 2018-08-02 | 2018-11-30 | 清华大学 | Overcome the video multispectral imaging method, apparatus and storage medium of ambient light interference |
CN110505376B (en) * | 2019-05-31 | 2021-04-30 | 杭州海康威视数字技术股份有限公司 | Image acquisition device and method |
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