CN104345523B - Method and its device that intelligent transportation video camera part light-inletting quantity is automatically controlled - Google Patents
Method and its device that intelligent transportation video camera part light-inletting quantity is automatically controlled Download PDFInfo
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- CN104345523B CN104345523B CN201310338386.2A CN201310338386A CN104345523B CN 104345523 B CN104345523 B CN 104345523B CN 201310338386 A CN201310338386 A CN 201310338386A CN 104345523 B CN104345523 B CN 104345523B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/006—Filter holders
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
- G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/18—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with light-reducing "factor" of filter or other obturator used with or on the lens of the camera
Abstract
The present invention relates to intelligent transportation video camera, method and its device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled are disclosed.The intelligent transportation video camera includes filter set, and the filter set includes the first optical filter and the second optical filter, and the first optical filter is located at the top of the second optical filter, and transmitance of the transmitance less than the second light transmission piece of the first optical filter.The method that intelligent transportation video camera part light-inletting quantity is automatically controlled comprises the following steps：When judging that the scene brightness of current video frame is less than threshold value, mobile spectral filter group makes the first optical filter and the second optical filter respectively cover the region where a part of region of whole scene, and the first optical filter covering traffic lights.Be moved to suitable position according to different scene mode control filter sets, when by other pattern switchings to low-brightness scene pattern when, the light-inletting quantity in restricting traffic lamp region reaches the purpose of red light not overexposure, thus avoid red light partially Huang the problem of.
Description
Technical field
The present invention relates to intelligent transportation video camera, the side that more particularly to the local light-inletting quantity of intelligent transportation video camera is automatically controlled
Method and its device.
Background technology
Along with sharply increasing for countries in the world vehicle fleet size, traffic is increasingly subject to the attention of people.Traffic jam,
The social concerns such as traffic accident, energy-consuming and environmental pollution deteriorate increasingly, how effectively to carry out traffic administration, increasingly into
For countries in the world government and relevant department focus of interest.
With developing rapidly for video technique and being multiplied for the operational speed of a computer, skill is detected based on computer video
The realization of the traffic surveillance and control system of art has been possibly realized.Existing intelligent transportation video camera in round-the-clock practical application, by
It is larger in 24 hours light the change of divergence of whole day, and due to weather, time, season, geographical position, the installation position of camera and angle
The difference of the factors such as degree, also frequently results in intensity of illumination, the difference of direction of illumination.And the difference of illumination, imaging that can be to camera
Form larger difference.
Existing intelligent transportation video camera is frequently encountered following problem in round-the-clock practical application：
Under low-light level environment, in the traffic lights picture captured, the problem of red light occurs partially yellow.
Under frontlighting environment, there is vehicle license plate overexposure, and scene too dark phenomenon above picture.
Under backlight environment, occur that vehicle license plate is excessively dark, and above picture scene overexposure phenomenon.
Overexposure is that because ambient light is too strong, aperture is excessive, and excessively slow etc. reason of shutter is caused when shooting video and photo
Picture in part or brightness it is too high so that video or photo whiting a kind of phenomenon.
Under low-light level environment, existing most of scheme is all by the way of red light is learnt to write by tracing over characters printed in red, by amber light in output image
Retouch into red light.But the foundation that such a processing method can not be punished as break in traffic rules and regulations.
Under along backlight scene, existing scheme calculates image feature information according to detection image and the image captured.Root
According to the image feature information of calculating, using the technology of BLC, compensation video camera shooting picture under along backlight environment lacks
Fall into, it is ensured that car plate brightness is suitable, and overall scenario is very poor.
The content of the invention
The method and its dress automatically controlled it is an object of the invention to provide a kind of local light-inletting quantity of intelligent transportation video camera
Put, when ambient brightness changes, suitable position is moved to according to different scene mode control filter sets, solved existing
The problem of red light is partially yellow in picture is captured in technology, and along scene overexposure or vehicle overexposure problem in the case of backlight.
In order to solve the above technical problems, embodiments of the present invention disclose a kind of local light-inletting quantity of intelligent transportation video camera
The method automatically controlled, video camera includes filter set, and the filter set includes the first optical filter and the second optical filter, first
Optical filter is located at the top of the second optical filter, and transmitance of the transmitance less than the second light transmission piece of the first optical filter；
Method comprises the following steps：
When judging that the scene brightness of current video frame is less than threshold value, mobile spectral filter group filters the first optical filter and second
Mating plate respectively covers the region where a part of region of whole scene, and the first optical filter covering traffic lights.
Embodiments of the present invention also disclose the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, and take the photograph
Camera includes filter set, and the filter set includes the first optical filter and the second optical filter, and the first optical filter is located at the second filter
The top of mating plate, and transmitance of the transmitance less than the second light transmission piece of the first optical filter；
Method comprises the following steps：
When judging current video frame for backlight scene pattern, mobile spectral filter group makes the first optical filter and the second optical filter
Respectively cover the region where a part of region of whole scene, and the second optical filter covering vehicle.
Embodiments of the present invention also disclose the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, and take the photograph
Camera includes filter set, and the filter set includes the second optical filter and the 3rd optical filter, and the second optical filter is located at the 3rd filter
The top of mating plate, and transmitance of the transmitance less than the second optical filter of the 3rd optical filter；
Method comprises the following steps：
When judging current video frame for frontlighting scene mode, mobile spectral filter group makes the second optical filter and the 3rd optical filter
Respectively cover the region where a part of region of whole scene, and the 3rd optical filter covering car plate.
Embodiments of the present invention also disclose the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, bag
Include：
Filter set, the filter set includes the first optical filter and the second optical filter, and the first optical filter is located at second and filtered
The top of piece, and transmitance of the transmitance less than the second light transmission piece of the first optical filter；
Judging unit, the scene mode for judging current video frame；
Low-light level control unit, it is mobile during for judging that the scene brightness of current video frame is less than threshold value when judging unit
Filter set, makes the first optical filter and the second optical filter respectively cover a part of region of whole scene, and the first optical filter is covered
Region where traffic lights.
Embodiments of the present invention also disclose the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, bag
Include：
Filter set, the filter set includes the first optical filter and the second optical filter, and the first optical filter is located at second and filtered
The top of piece, and transmitance of the transmitance less than the second light transmission piece of the first optical filter；
Judging unit, the scene mode for judging current video frame；
Backlight control unit, for when judging unit judges current video frame for backlight scene pattern, mobile spectral filter
Group, makes the first optical filter and the second optical filter respectively cover a part of region of whole scene, and the second optical filter covering vehicle institute
Region.
Embodiments of the present invention also disclose the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, bag
Include：
Filter set, the filter set includes the second optical filter and the 3rd optical filter, and the second optical filter is located at the 3rd and filtered
The top of piece, and transmitance of the transmitance less than the second optical filter of the 3rd optical filter；
Judging unit, the scene mode for judging current video frame；
Frontlighting control unit, for when judging unit judges current video frame for frontlighting scene mode, mobile spectral filter
Group, makes the second optical filter and the 3rd optical filter respectively cover a part of region of whole scene, and the 3rd optical filter covering car plate institute
Region.
Compared with prior art, the main distinction and its effect are embodiment of the present invention：
When by other pattern switchings to low-brightness scene pattern when, control filter set be moved to suitable position, limit
The light-inletting quantity in traffic lights region, reaches the purpose of red light not overexposure, so as to avoid the problem of red light is partially yellow, reaches normal
Traffic lights effect.
When by other pattern switchings to backlight scene pattern when, control filter set be moved to suitable position, so as to keep away
Scene overexposure above backlight situation hypograph is exempted from, the problem of lower section vehicle is too dark occurs.
When by other pattern switchings to frontlighting scene mode when, control filter set be moved to suitable position, so as to keep away
Scene above frontlighting situation hypograph is exempted from too dark, has occurred the problem of the vehicle license plate overexposure of lower section.
Brief description of the drawings
Fig. 1 is the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled in first embodiment of the invention
Schematic flow sheet；
Fig. 2 is a kind of schematic diagram of filter set in first embodiment of the invention；
Fig. 3 is a kind of schematic diagram of filter set in first embodiment of the invention；
Fig. 4 is the signal that photoimaging is reflected when a kind of two optical filters are glued together in first embodiment of the invention
Figure；
Fig. 5 is the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled in first embodiment of the invention
Schematic flow sheet；
Fig. 6 is the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled in second embodiment of the invention
Schematic flow sheet；
Fig. 7 is the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled in third embodiment of the invention
Schematic flow sheet；
Fig. 8 is the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled in four embodiment of the invention
Structural representation；
Fig. 9 is that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled in four embodiment of the invention preference
The structural representation of device；
Figure 10 is a kind of filter set different filter set of two panels transmitance for above and below in four embodiment of the invention
The local light-inletting quantity control schematic diagram being combined；
Figure 11 is the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled in fifth embodiment of the invention
Structural representation；
Figure 12 is the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled in sixth embodiment of the invention
Structural representation；
Figure 13 is that a kind of filter set is the different optical filter of three transmitances of upper, middle and lower in sixth embodiment of the invention
The local light-inletting quantity control schematic diagram combined.
Embodiment
In the following description, in order that reader more fully understands the application and proposes many ins and outs.But, this
Even if the those of ordinary skill in field is appreciated that many variations without these ins and outs and based on following embodiment
And modification, each claim of the application technical scheme claimed can also be realized.
To make the object, technical solutions and advantages of the present invention clearer, the implementation below in conjunction with accompanying drawing to the present invention
Mode is described in further detail.
First embodiment of the invention is related to the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled.Fig. 1
It is the schematic flow sheet for the method that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled.
The intelligent transportation video camera includes filter set, and the filter set includes the first optical filter and the second optical filter,
First optical filter is located at the top of the second optical filter, and transmitance of the transmitance less than the second light transmission piece of the first optical filter, such as
Shown in Fig. 2 a.
It should be noted that in the present embodiment, it is preferable that filter set is integral type, is multiple optical filters group
The filter set to be formed is combined, actual is whole piece optical filter, is only divided into the different some of transmitance, such as first
Optical filter, the second optical filter or the 3rd optical filter.
Filter set is a piece of for integral type, is divided into some by transmitance：Up and down or upper, middle and lower.
It should be further stated that, alleged top lower section is the relative altitude relative to ground in present embodiment
For, top is direction from the ground farther out, and lower section is direction nearer from the ground.
Specifically, as shown in figure 1, this method comprises the following steps：
In a step 101, the scene mode of current video frame is analyzed.
Scene mode includes：Frontlighting scene, backlight scene, normal scene and low-brightness scene.
Then into step 102, judge whether the scene brightness of current video frame is less than threshold value.
In this step, scene brightness has a variety of determination methods less than threshold value, and typical case is that mean flow rate is less than threshold value, in spy
Determine to may also mean that the brightness of fixed regional area is less than after threshold value, or the computing specified to whole scene under scene,
Judge whether brightness is less than threshold value again.
During less than threshold value, into step 103, mobile spectral filter group makes the first optical filter and the second optical filter respectively cover whole
Region where a part of region of individual scene, and the first optical filter covering traffic lights.
Hereafter this flow is terminated.
Optical filter is one kind of optical element, for the luminous intensity that decays, and changes incident light spectral component, frequecy characteristic or inclined
Shake characteristic.It is widely used on the optoelectronic devices such as video camera.
Fig. 2 be filter set schematic diagram provided in an embodiment of the present invention, the present invention in optical filter can be multiple combinations side
Formula, according to different production technologies, it is possible to achieve multiple combinations：
A. the different filter set of two panels transmitance is combined into a piece of, or the individually different optical filter of two panels transmitance up and down,
Wherein：Transmitance x<Transmitance y；
B. the different filter set of left and right two panels transmitance is combined into a piece of, or the individually different optical filter of two panels transmitance,
Wherein, transmitance x<Transmitance y.
It should be noted that top-priority at present is optical filter combination, it is made up of ND glass and coated glass, it is single
The mode of only two panels, which can contemplate, does Fuzzy Processing.
Furthermore, it is to be understood that in some other embodiments of the present invention, filter set has a variety of different combination sides
Formula, according to different production technologies, it is possible to achieve multiple combinations, is not limited thereto.
Further, it is preferable to which ground, the method that intelligent transportation video camera part light-inletting quantity is automatically controlled also includes following step
Suddenly：
When judging current video frame for backlight scene pattern, mobile spectral filter group makes the first optical filter and the second optical filter
Respectively cover the region where a part of region of whole scene, and the second optical filter covering vehicle.
Further, it is preferable to which ground, the filter set also includes the 3rd optical filter, the 3rd optical filter is located at the second optical filter
Lower section, and transmitance of the transmitance less than the second optical filter of the 3rd optical filter.
It should be noted that in the present embodiment, it is preferable that filter set is integral type, is multiple optical filters group
The filter set to be formed is combined, actual is whole piece optical filter, is only divided into the different some of transmitance, such as first
Optical filter, the second optical filter or the 3rd optical filter.
Filter set is a piece of for integral type, is divided into some by transmitance：Up and down or upper, middle and lower.
Fig. 3 be filter set schematic diagram provided in an embodiment of the present invention, the present invention in optical filter can be multiple combinations side
Formula, according to different production technologies, it is possible to achieve multiple combinations：
A. three different filter sets of transmitance of upper, middle and lower are combined into a piece of, or the different optical filtering of independent three transmitances
Piece, wherein：Transmitance x<Transmitance y；Transmitance z<Transmitance y；
B. the different filter set of transmitance of left, center, right three is combined into a piece of, or the different optical filtering of independent three transmitances
Piece, wherein：Transmitance x<Transmitance y；Transmitance z<Transmitance y.
Similarly, it is necessary to which explanation, top-priority at present is optical filter combination, by ND glass and coated glass
Composition, the mode of independent two panels, which can contemplate, does Fuzzy Processing.
In the present embodiment, it is preferable that the first optical filter is ND glass, the second optical filter is white glass, and the 3rd filters
Piece is ND glass.
Preferably, the thickness of ND glass is 0.5 to 1.5 millimeter, and optimum thickness is in 1 millimeter；Transmitance is 1% to 4%
Between, optimum transmission is 2.5% or so.
In the present embodiment, it is preferable that first, second, and third optical filter is glued together by optical cement.Each glue
Conjunction face is in an angle with the incident surface of light, and the angular range of the angle is between 30 to 60 spend.
Furthermore, it is to be understood that in some other embodiments of the present invention, cemented surface can not also be tilted, but with
The incident surface of light is vertical.
Wherein, ND glass refers to neutral gray scale glass, abbreviation neutral density or ND glass, and the glass can be in wider wavelength
In the range of, color of the decay of homogenous proportion without changing light is carried out to incident light, is widely used in preventing taking the photograph for overexposure
Shadow or industry shooting occasion.
Below, so that white glass and two optical filters of ND glass are glued together as an example, a kind of preferred filter set is illustrated
Structure and characteristic.
Specifically, as shown in figure 4, in fig .4, the cemented surfaces of two optical filters of white glass and ND glass and light are incident
Surface is vertical；In fig. 4b, the cemented surface of two optical filters of white glass and ND glass and the incident surface of light are in an angle, the folder
The angular range at angle is between 5 to 60 spend.
As shown in fig. 4 a, in the case of cementing layer is not inclined, ambient is inciding white glass, cementing layer and ND glass
When on the interface between glass, because of the change of different materials refractive index, reflected light can be formed on these interfaces, if reflected light falls
To sensor（Sensor）On, then form ghost image.Ghost image can have a strong impact on the picture quality of video camera.It is anti-in order to mitigate interface
Penetrate, it is necessary to careful selection ND glass and the material of optical cement so that it is close that their refractive index and white glass is tried one's best.But i.e.
Make by such processing, sufficiently strong in external light source, such as when having automobile lamp direct projection camera, the influence of ghost image is still
Very big, picture effect is still undesirable.
As shown in fig 4b, white glass and ND glass are all made into inclination angle and glued together, accordingly even when cemented surface
There is reflected light, but because there is certain inclination angle in the face, from reflection theorem, reflected light can shine the area outside sensor
Domain, such as so that obvious influence will not be caused on image.Further, since there is inclination angle, when a series of light being arranged above and below
Successively from left to right by optical filter when, the distance that they are propagated in ND glass can gradually increase, to the attenuating of light
Gradually strengthen, so as to form the effect of the Graduated Filter.
Preferably, the method that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled is further comprising the steps of：
When judging current video frame for frontlighting scene mode, mobile spectral filter group makes the second optical filter and the 3rd optical filter
Respectively cover the region where a part of region of whole scene, and the 3rd optical filter covering car plate.
Furthermore, it is to be understood that the region where covering car plate refers to cover the position that car plate generally occurs.
As a preferred embodiment of the present invention, Fig. 5 is the stream of the local entering light amount control method of video camera in the present invention
Journey schematic diagram, light-inletting quantity control realizes that step includes：
1. a pair frame of video is analyzed, judge which kind of scene mode current live environment is in, scene mode includes：Frontlighting
Scene, backlight scene, normal scene, low-brightness scene；
2. obtain the scene mode of present frame；
3. the scene mode of present frame changes, the movement of filter set is controlled；
4. the position of current filter set is detected in real time；
5. filter set is reached behind precalculated position, stop the movement of filter set；Otherwise, it will move on filter set.
When by other pattern switchings to low-brightness scene pattern when, control optical filter combination is moved to suitable position, limit
The light-inletting quantity in traffic lights region has been made, the purpose of red light not overexposure is reached, so as to avoid the problem of red light is partially yellow, reached normal
Traffic lights effect.
When by other pattern switchings to backlight scene pattern when, control optical filter combination is moved to suitable position so that
Scene overexposure above backlight situation hypograph is avoided, the problem of lower section vehicle is too dark occurs.
When by other pattern switchings to frontlighting scene mode when, control optical filter combination is moved to suitable position so that
Avoid scene above frontlighting situation hypograph too dark, occur the problem of the vehicle license plate overexposure of lower section.
Second embodiment of the invention is related to the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled.Fig. 6
It is the schematic flow sheet for the method that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled.
The intelligent transportation video camera includes filter set, and the filter set includes the first optical filter and the second optical filter,
First optical filter is located at the top of the second optical filter, and transmitance of the transmitance less than the second light transmission piece of the first optical filter.
Specifically, as shown in fig. 6, this method comprises the following steps：
In step 601, the scene mode of current video frame is analyzed.
Scene mode includes：Frontlighting scene, backlight scene, normal scene and low-brightness scene.
Whether then into step 602, it is backlight scene pattern to judge current video frame.
If so, then entering step 603, mobile spectral filter group makes the first optical filter and the second optical filter respectively cover whole field
Region where a part of region of scape, and the second optical filter covering vehicle.
Hereafter this flow is terminated.
When judging current video frame for backlight scene pattern, mobile spectral filter group makes the first optical filter and the second optical filter
Respectively cover the region where a part of region of whole scene, and the second optical filter covering vehicle.
When by other pattern switchings to backlight scene pattern when, control optical filter combination is moved to suitable position so that
Scene overexposure above backlight situation hypograph is avoided, the problem of lower section vehicle is too dark occurs.
Third embodiment of the invention is related to the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled.Fig. 7
It is the schematic flow sheet for the method that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled.
The method video camera that intelligent transportation video camera part light-inletting quantity is automatically controlled includes filter set, the optical filter
Group includes the second optical filter and the 3rd optical filter, and the second optical filter is positioned at the top of the 3rd optical filter, and the 3rd optical filter is saturating
Cross the transmitance that rate is less than the second light transmission piece.
Specifically, as shown in fig. 7, this method comprises the following steps：
In step 701, the scene mode of current video frame is analyzed.
Scene mode includes：Frontlighting scene, backlight scene, normal scene and low-brightness scene.
Whether then into step 702, it is frontlighting scene mode to judge current video frame.
If so, then entering step 703, mobile spectral filter group makes the second optical filter and the 3rd optical filter respectively cover whole field
Region where a part of region of scape, and the 3rd optical filter covering car plate.
Hereafter this flow is terminated.
When judging current video frame for frontlighting scene mode, mobile spectral filter group makes the second optical filter and the 3rd optical filter
Respectively cover the region where a part of region of whole scene, and the 3rd optical filter covering car plate.
When by other pattern switchings to frontlighting scene mode when, control optical filter combination is moved to suitable position so that
Avoid scene above frontlighting situation hypograph too dark, occur the problem of the vehicle license plate overexposure of lower section.
The each method embodiment of the present invention can be realized with modes such as software, hardware, firmwares.No matter the present invention be with
Software, hardware or firmware mode realize that instruction code may be stored in the addressable memory of any kind of computer
In（It is for example permanent or revisable, it is volatibility or non-volatile, it is solid-state or non-solid, it is fixed or
Replaceable medium of person etc.）.Equally, memory may, for example, be programmable logic array（Programmable Array
Logic, referred to as " PAL "）, random access memory（Random Access Memory, referred to as " RAM "）, programmable read-only deposit
Reservoir（Programmable Read Only Memory, referred to as " PROM "）, read-only storage（Read-Only Memory, letter
Claim " ROM "）, Electrically Erasable Read Only Memory（Electrically Erasable Programmable ROM, referred to as
“EEPROM”）, disk, CD, digital versatile disc（Digital Versatile Disc, referred to as " DVD "）Etc..
Four embodiment of the invention is related to the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled.Fig. 8
It is the structural representation for the device that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled.
Specifically, as shown in figure 8, the device that intelligent transportation video camera part light-inletting quantity is automatically controlled includes：
Filter set, the filter set includes the first optical filter and the second optical filter, and the first optical filter is located at second and filtered
The top of piece, and transmitance of the transmitance less than the second light transmission piece of the first optical filter.
It should be noted that in the present embodiment, it is preferable that filter set is integral type, is multiple optical filters group
The filter set to be formed is combined, actual is whole piece optical filter, is only divided into the different some of transmitance, such as first
Optical filter, the second optical filter or the 3rd optical filter.
Filter set is a piece of for integral type, is divided into some by transmitance：Up and down or upper, middle and lower.
Judging unit, the scene mode for judging current video frame.
Low-light level control unit, it is mobile during for judging that the scene brightness of current video frame is less than threshold value when judging unit
Filter set, makes the first optical filter and the second optical filter respectively cover a part of region of whole scene, and the first optical filter is covered
Region where traffic lights.
Preferably, the device that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled also includes：
Backlight control unit, for when judging unit judges current video frame for backlight scene pattern, mobile spectral filter
Group, makes the first optical filter and the second optical filter respectively cover a part of region of whole scene, and the second optical filter covering vehicle institute
Region.
Further, it is preferable to which ground, filter set also includes the 3rd optical filter, the 3rd optical filter is located under the second optical filter
Side, and transmitance of the transmitance less than the second optical filter of the 3rd optical filter.
Preferably, the device that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled also includes：
Frontlighting control unit, for when judging unit judges current video frame for frontlighting scene mode, mobile spectral filter
Group, makes the second optical filter and the 3rd optical filter respectively cover a part of region of whole scene, and the 3rd optical filter covering car plate institute
Region.
As the preference of the present invention, device such as Fig. 9 that intelligent transportation video camera part light-inletting quantity is automatically controlled
It is shown, including：
Filter set, for the light-inletting quantity for controlling to enter in camera optics sensor.
Filter set provides one or more groups of optical filters, for controlling to pass through optical filter, into the entering light of optical sensor
Amount；Optical filter is combined according to light-inletting quantity size, there is 100% transmitance and a certain proportion of transmitance.
Optical sensor, for converting optical signals to electric signal, and finally gives vision signal.
Optical sensor is essential device in video camera, by converting optical signals to electric signal, and final
To vision signal.
Essential unit in image processing module, video camera, the video for optical sensor to be sent is believed
Number carry out calculation process, analyze frame of video scene mode.
Position detecting module, the position for detecting filter set in real time.
Transmission module, for driving filter set, makes filter set move to specified location together with transmission module.
Filter set is driven using stepper motor in this preference, also may be used in the other embodiment of the present invention
To use other transmission modules, the implementation of the present invention is had no effect on.
Control module, the scene mode for obtaining present frame from image processing module, real-time test position detects mould
Block, and control filter set to be moved to precalculated position by transmission module.Control module is according to institute's computing in image processing module
Positional information in the information gone out, test position detection module, by being analyzed and processed to operation result, so as to transmission mould
Block is controlled, and finally realizes the accurate switching of filter set.
Video camera part light-inletting quantity autocontrol method is main in this preference completes in the control module, specifically
Say, control module includes following submodule：
Scene detection submodule, for when ambient brightness changes, being divided according to image processing module current frame image
Analysis, judges which kind of scene mode current live environment is in.
Optical filter switching control submodule, for completing the control to transmission module and the detection to position detecting module,
Filter set is moved to precalculated position by realization like clockwork.
Video camera completes following work in this preference：
1. light enters optical sensor by filter set；
2. optical sensor utilizes opto-electronic conversion, the video signal after conversion is sent to image processing module；
3. image processing module can control shutter and the gain of optical sensor, while can be carried out to current video frame
Analysis, judges which kind of scene mode current live environment is in, and scene mode includes：Frontlighting scene, backlight scene, normal field
Scape, low-brightness scene；
4. control module obtains the scene mode of present frame from image processing module, real-time test position detection module,
And finally control transmission module switches over operation to optical filter.
As shown in Figure 10, local light-inletting quantity control is completed such as the local light-inletting quantity control schematic diagram of the preference in the present invention
Lower work：
Filter set shown in Figure 10 is combined for the different filter set of two panels transmitance up and down, wherein：Through
Rate x<Transmitance y
1. image processing module analyzes present frame, judge to draw the scene mode of current live environment；
2. image processing module draws the scene mode of current live environment, then notifies optical filter by operational analysis
Switching control submodule current scene pattern；
3. optical filter switching control submodule obtains current live environmental pattern, when by other pattern switchings to low-light level
During scape pattern, optical filter switching control submodule will start, and control optical filter combination is moved to precalculated position, makes optical sensor
Upper area（Region A in diagram）Light-inletting quantity lower region（Region B in diagram）Light-inletting quantity to lack, limit red light region
Light-inletting quantity, reach the purpose of red light not overexposure, so as to avoid the problem of red light is partially yellow, reach normal red light effect；
4. optical filter switching control submodule obtains current live environmental pattern, when by other pattern switchings to backlight scene
During pattern, optical filter switching control submodule will start, and control optical filter combination is moved to precalculated position, makes on optical sensor
Square region（Region A in diagram）Light-inletting quantity lower region（Region B in diagram）Light-inletting quantity to lack, limit area above image
Domain（Region A in diagram）Light-inletting quantity, so as to avoid scene overexposure above backlight situation hypograph, lower section vehicle is too dark to ask
Topic occurs.
It should be noted that in the present embodiment, it is preferable that filter set is integral type, is multiple optical filters group
The filter set to be formed is combined, actual is whole piece optical filter, is only divided into the different some of transmitance, such as first
Optical filter, the second optical filter or the 3rd optical filter.
Filter set is a piece of for integral type, is divided into some by transmitance：Up and down or upper, middle and lower.
When ambient brightness changes, the position handover operation of filter set is carried out according to different scene modes, is solved
The problem of red light is partially yellow in picture is captured in the prior art, and in the case of backlight the problem of scene overexposure.
When by other pattern switchings to low-brightness scene pattern when, limit the light-inletting quantity in red light region, reach red light not
The purpose of overexposure, so as to avoid the problem of red light is partially yellow, reaches normal red light effect.
When by other pattern switchings to backlight scene pattern when, control optical filter combination is moved to precalculated position, so as to keep away
Scene overexposure above backlight situation hypograph is exempted from, the problem of lower section vehicle is too dark occurs.
First embodiment is the method embodiment corresponding with present embodiment, and present embodiment can be implemented with first
Mode is worked in coordination implementation.The relevant technical details mentioned in first embodiment are still effective in the present embodiment, in order to
Reduce and repeat, repeat no more here.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in the first implementation
In mode.
Fifth embodiment of the invention is related to the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled.Figure 11
It is the structural representation for the device that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled.
Specifically, as shown in figure 11, the device that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled includes：
Filter set, the filter set includes the first optical filter and the second optical filter, and the first optical filter is located at second and filtered
The top of piece, and transmitance of the transmitance less than the second light transmission piece of the first optical filter.
It should be noted that in the present embodiment, it is preferable that filter set is integral type, is multiple optical filters group
The filter set to be formed is combined, actual is whole piece optical filter, is only divided into the different some of transmitance, such as first
Optical filter, the second optical filter or the 3rd optical filter.
Filter set is a piece of for integral type, is divided into some by transmitance：Up and down or upper, middle and lower.
Judging unit, the scene mode for judging current video frame.
Backlight control unit, for when judging unit judges current video frame for backlight scene pattern, mobile spectral filter
Group, makes the first optical filter and the second optical filter respectively cover a part of region of whole scene, and the second optical filter covering vehicle institute
Region.
Second embodiment is the method embodiment corresponding with present embodiment, and present embodiment can be implemented with second
Mode is worked in coordination implementation.The relevant technical details mentioned in second embodiment are still effective in the present embodiment, in order to
Reduce and repeat, repeat no more here.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in the second implementation
In mode.
Sixth embodiment of the invention is related to the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled.Figure 12
It is the structural representation for the device that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled.
Specifically, as shown in figure 12, the device that the local light-inletting quantity of the intelligent transportation video camera is automatically controlled includes：
Filter set, the filter set includes the second optical filter and the 3rd optical filter, and the second optical filter is located at the 3rd and filtered
The top of piece, and transmitance of the transmitance less than the second light transmission piece of the 3rd optical filter.
Judging unit, the scene mode for judging current video frame.
Frontlighting control unit, it is mobile to filter for when judging unit judges current video frame for frontlighting light scene mode
Piece group, makes the second optical filter and the 3rd optical filter respectively cover a part of region of whole scene, and the 3rd optical filter covering car plate
The region at place.
As the preference of the present invention, Figure 13 is local light-inletting quantity in local light-inletting quantity control schematic diagram, the present invention
Control completes following work：
Filter set shown in Figure 13 is combined for three different filter sets of transmitance of upper, middle and lower, wherein：Thoroughly
Cross rate x<Transmitance y；Transmitance z<Transmitance y；
1. image processing module analyzes present frame, judge to draw the scene mode of current live environment；
2. image processing module draws the scene mode of current live environment, then notifies optical filter by operational analysis
Switching control submodule current scene pattern；
3. optical filter switching control submodule obtains current live environmental pattern, when by other pattern switchings to low-light level
During scape pattern, optical filter switching control submodule will start, and control optical filter combination is moved to precalculated position, makes optical sensor
Upper area（Region A in diagram）Light-inletting quantity lower region（Region B in diagram）Light-inletting quantity to lack, limit red light region
Light-inletting quantity, reach the purpose of red light not overexposure, so as to avoid the problem of red light is partially yellow, reach normal red light effect；
4. optical filter switching control submodule obtains current live environmental pattern, when by other pattern switchings to backlight scene
During pattern, optical filter switching control submodule will start, and control optical filter combination is moved to precalculated position, makes on optical sensor
Square region（Region A in diagram）Light-inletting quantity lower region（Region B in diagram）Light-inletting quantity to lack, limit area above image
Domain（Region A in diagram）Light-inletting quantity, so as to avoid scene overexposure above backlight situation hypograph, lower section vehicle is too dark to ask
Topic occurs；
5. optical filter switching control submodule obtains current live environmental pattern, when by other pattern switchings to frontlighting scene
During pattern, optical filter switching control submodule will start, and control optical filter combination is moved to precalculated position, makes under optical sensor
Square region（Region D in diagram）Light-inletting quantity upper region（Region C in diagram）Light-inletting quantity to lack, limit image lower zone
Domain（Region D in diagram）Light-inletting quantity so that it is too dark to avoid scene above frontlighting situation hypograph, lower section vehicle license plate overexposure
The problem of occur.
It should be noted that in the present embodiment, it is preferable that filter set is integral type, is multiple optical filters group
The filter set to be formed is combined, actual is whole piece optical filter, is only divided into the different some of transmitance, such as first
Optical filter, the second optical filter or the 3rd optical filter.
Filter set is a piece of for integral type, is divided into some by transmitance：Up and down or upper, middle and lower.
3rd embodiment is the method embodiment corresponding with present embodiment, and present embodiment can be implemented with the 3rd
Mode is worked in coordination implementation.The relevant technical details mentioned in 3rd embodiment are still effective in the present embodiment, in order to
Reduce and repeat, repeat no more here.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in the 3rd implementation
In mode.
It is existing to solve the invention provides the apparatus and method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled
Have and the problem of red light is partially yellow in picture is captured in technology, and along scene overexposure or vehicle overexposure problem in the case of backlight.
The present invention efficiently solves the problem of red light is partially yellow under low-light level environment, and being provided in break in traffic rules and regulations processing has
The punishing justification of effect；Simultaneously under severe suitable backlight scene, it is ensured that the effect of car plate and overall scenario.
It should be noted that in the claim and specification of this patent, such as first and second or the like relation
Term is used merely to make a distinction an entity or operation with another entity or operation, and not necessarily requires or imply
There is any this actual relation or order between these entities or operation.Moreover, term " comprising ", "comprising" or its
Any other variant is intended to including for nonexcludability so that process, method, article including a series of key elements or
Equipment not only includes those key elements, but also other key elements including being not expressly set out, or also include be this process,
Method, article or the intrinsic key element of equipment.In the absence of more restrictions, by wanting that sentence " including one " is limited
Element, it is not excluded that also there is other identical element in the process including the key element, method, article or equipment.
Although by referring to some of the preferred embodiment of the invention, being shown and described to the present invention,
It will be understood by those skilled in the art that can to it, various changes can be made in the form and details, without departing from this hair
Bright spirit and scope.
Claims (11)
1. the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, it is characterised in that the video camera includes
Filter set, the filter set includes the first optical filter and the second optical filter being arranged side by side, and the first optical filter is located at the second filter
The top of mating plate, and transmitance of the transmitance less than the second optical filter of the first optical filter；
First and second optical filter is glued together by optical cement, and cemented surface is in an angle with the incident surface of light, should
The angular range of angle is between 5 to 60 spend；
It the described method comprises the following steps：
When judging that the scene brightness of current video frame is less than threshold value, the mobile filter set makes first optical filter and the
Two optical filters respectively cover the region where a part of region of whole scene, and first optical filter covering traffic lights.
2. the method that the local light-inletting quantity of intelligent transportation video camera according to claim 1 is automatically controlled, it is characterised in that also
Comprise the following steps：
When judging current video frame for backlight scene pattern, the mobile filter set filters first optical filter and second
Mating plate respectively covers the region where a part of region of whole scene, and second optical filter covering vehicle.
3. the method that the local light-inletting quantity of intelligent transportation video camera according to claim 1 or 2 is automatically controlled, its feature exists
The 3rd optical filter for also including being arranged side by side in, the filter set, the 3rd optical filter is located at the lower section of the second optical filter, and the
The transmitance of three optical filters is less than the transmitance of the second optical filter；
Methods described is further comprising the steps of：
When judging current video frame for frontlighting scene mode, the mobile filter set makes second optical filter and the 3rd filter
Mating plate respectively covers the region where a part of region of whole scene, and the 3rd optical filter covering car plate.
4. the method that the local light-inletting quantity of intelligent transportation video camera according to claim 3 is automatically controlled, it is characterised in that institute
State second and the 3rd optical filter it is glued together by optical cement, cemented surface is in an angle, the angle with the incident surface of light
Angular range 5 to 60 spend between.
5. the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, it is characterised in that the video camera includes
Filter set, the filter set includes the first optical filter and the second optical filter being arranged side by side, and the first optical filter is located at the second filter
The top of mating plate, and transmitance of the transmitance less than the second optical filter of the first optical filter；
First and second optical filter is glued together by optical cement, and cemented surface is in an angle with the incident surface of light, should
The angular range of angle is between 5 to 60 spend；
It the described method comprises the following steps：
When judging current video frame for backlight scene pattern, the mobile filter set filters first optical filter and second
Mating plate respectively covers the region where a part of region of whole scene, and second optical filter covering vehicle.
6. the method that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, it is characterised in that the video camera includes
Filter set, the filter set includes the second optical filter and the 3rd optical filter being arranged side by side, and the second optical filter is located at the 3rd filter
The top of mating plate, and transmitance of the transmitance less than the second optical filter of the 3rd optical filter；
Described second and the 3rd optical filter it is glued together by optical cement, the incident surface of cemented surface and light is in an angle, should
The angular range of angle is between 5 to 60 spend；
It the described method comprises the following steps：
When judging current video frame for frontlighting scene mode, the mobile filter set makes second optical filter and the 3rd filter
Mating plate respectively covers the region where a part of region of whole scene, and the 3rd optical filter covering car plate.
7. the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, it is characterised in that including：
Filter set, the filter set includes the first optical filter and the second optical filter that are arranged side by side, and the first optical filter is located at the
The top of two optical filters, and transmitance of the transmitance less than the second optical filter of the first optical filter；
First and second optical filter is glued together by optical cement, and cemented surface is in an angle with the incident surface of light, should
The angular range of angle is between 5 to 60 spend；
Judging unit, the scene mode for judging current video frame；
Low-light level control unit, it is mobile during for judging that the scene brightness of current video frame is less than threshold value when the judging unit
The filter set, makes first optical filter and the second optical filter respectively cover a part of region of whole scene, and described
Region where one optical filter covering traffic lights.
8. the device that the local light-inletting quantity of intelligent transportation video camera according to claim 7 is automatically controlled, it is characterised in that also
Including：
Backlight control unit, for when the judging unit judges current video frame for backlight scene pattern, moving the filter
Mating plate group, makes first optical filter and the second optical filter respectively cover a part of region of whole scene, and described second filters
Region where piece covering vehicle.
9. the device that the local light-inletting quantity of intelligent transportation video camera according to claim 7 or 8 is automatically controlled, its feature exists
The 3rd optical filter for also including being arranged side by side in, the filter set, the 3rd optical filter is located at the lower section of the second optical filter, and the
The transmitance of three optical filters is less than the transmitance of the second optical filter；
Described second and the 3rd optical filter it is glued together by optical cement, the incident surface of cemented surface and light is in an angle, should
The angular range of angle is between 5 to 60 spend；
Also include：
Frontlighting control unit, for when the judging unit judges current video frame for frontlighting scene mode, moving the filter
Mating plate group, makes second optical filter and the 3rd optical filter respectively cover a part of region of whole scene, and the described 3rd filters
Region where piece covering car plate.
10. the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, it is characterised in that including：
Filter set, the filter set includes the first optical filter and the second optical filter that are arranged side by side, and the first optical filter is located at the
The top of two optical filters, and transmitance of the transmitance less than the second optical filter of the first optical filter；
First and second optical filter is glued together by optical cement, and cemented surface is in an angle with the incident surface of light, should
The angular range of angle is between 5 to 60 spend；
Judging unit, the scene mode for judging current video frame；
Backlight control unit, for when the judging unit judges current video frame for backlight scene pattern, moving the filter
Mating plate group, makes first optical filter and the second optical filter respectively cover a part of region of whole scene, and described second filters
Region where piece covering vehicle.
11. the device that a kind of local light-inletting quantity of intelligent transportation video camera is automatically controlled, it is characterised in that including：
Filter set, the filter set includes the second optical filter and the 3rd optical filter that are arranged side by side, and the second optical filter is located at the
The top of three optical filters, and transmitance of the transmitance less than the second optical filter of the 3rd optical filter；
Described second and the 3rd optical filter it is glued together by optical cement, the incident surface of cemented surface and light is in an angle, should
The angular range of angle is between 5 to 60 spend；
Judging unit, the scene mode for judging current video frame；
Frontlighting control unit, for when the judging unit judges current video frame for frontlighting scene mode, moving the filter
Mating plate group, makes second optical filter and the 3rd optical filter respectively cover a part of region of whole scene, and the described 3rd filters
Region where piece covering car plate.
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| CN105389571A (en) * | 2015-12-08 | 2016-03-09 | 东莞市中控电子技术有限公司 | Image acquisition system and image acquisition method |
| CN105578079B (en) * | 2015-12-18 | 2017-11-17 | 广东欧珀移动通信有限公司 | Imaging sensor and picture quality regulation method, imaging device and method and mobile terminal |
| CN105578006B (en) * | 2015-12-18 | 2018-02-13 | 广东欧珀移动通信有限公司 | Imaging method, imaging device and electronic installation |
| CN105611125B (en) * | 2015-12-18 | 2018-04-10 | 广东欧珀移动通信有限公司 | Imaging method, imaging device and electronic installation |
| CN108932847B (en) * | 2017-05-23 | 2020-08-28 | 杭州海康威视数字技术股份有限公司 | Method and device for collecting signal lamp image |
| CN110740253B (en) * | 2019-04-01 | 2020-11-10 | 徐成晓 | Shooting mode self-adaptive switching method |
| CN112135012B (en) * | 2019-06-25 | 2022-02-11 | 杭州海康威视数字技术股份有限公司 | Image acquisition device and image acquisition method |
| CN110944117B (en) * | 2019-11-15 | 2021-08-31 | 浙江大华技术股份有限公司 | Image processing method, computer equipment, storage device and intelligent monitoring system |
| CN111031254B (en) * | 2020-01-15 | 2021-02-26 | 浙江大华技术股份有限公司 | Camera mode switching method and device, computer device and readable storage medium |
| CN115148165B (en) * | 2022-04-18 | 2023-06-27 | 深圳市华星光电半导体显示技术有限公司 | Display screen adjusting method and device, display device and storage medium |
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