CN109165548A - A kind of method and apparatus of light filling - Google Patents
A kind of method and apparatus of light filling Download PDFInfo
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- CN109165548A CN109165548A CN201810739799.4A CN201810739799A CN109165548A CN 109165548 A CN109165548 A CN 109165548A CN 201810739799 A CN201810739799 A CN 201810739799A CN 109165548 A CN109165548 A CN 109165548A
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- supplementary lighting
- lighting sources
- iris recognition
- iris
- light filling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/19—Sensors therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The embodiment of the present invention proposes a kind of method and apparatus of light filling, applied in the iris authentication system including supplementary lighting sources and for the imaging sensor for obtaining image, wherein the Exposure mode of described image sensor is that full images pixel exposes simultaneously；Described image sensor is connect with the supplementary lighting sources, to realize time synchronization, this method comprises: determining point and end time point at the beginning of described image sensor is exposed when obtaining each frame image；Control starts the supplementary lighting sources in the sart point in time, and closes the supplementary lighting sources in the end time point.Using this by selecting Exposure mode as the imaging sensor of full images pixel exposure simultaneously, and while using image sensor exposure, supplementary lighting sources just carry out light filling operation, ensuring has enough light when imaging sensor acquires each frame iris image to obtain the clear iris image that can be authenticated, and the energy has been saved, extend the service life of supplementary lighting sources.
Description
Technical field
The present invention relates to light filling field, in particular to a kind of method and apparatus of light filling.
Background technique
Currently, with the development and rise of biological information identification technology, relative to traditional identity recognizing technology (such as
Key, password, electronic tag etc.) have higher safety, convenience, wide usage, common biological identification technology have fingerprint,
Face, iris, voice recognition etc..Wherein, iris recognition technology is a kind of peace based on the iris progress identification in eyes
Full inspection survey technology has higher accuracy and superiority with biological identification technologies such as currently popular recognitions of face.
Why iris recognition technology becomes the research hotspot quickly grown, is because body iris has a characteristic that
1, antifalsification, iris cease altogether with human life symbiosis, it is ensured that the authenticity of physiological tissue has the antifalsification of height；2, non-
Contact can obtain iris digital picture in certain distance, be not necessarily to user's contact arrangement, not invade the person, easily quilt
The public receives；3, uniqueness, the information that each iris is included are different from, and have unique personal characteristics；4, stablize
Property, iris is quite stable in life people's, will not change substantially.
But in iris recognition skill, the process of iris image acquiring needs to treat the human eye of acquisition target and iris carries out
Infrared light light filling.In the prior art, supplementary lighting sources consume more energy consumption in state is always on during iris recognition.
At the same time, due to low-power consumption, the characteristic of low cost, the imaging sensor used in the prior art is mostly to use
Be Rolling shutter technology sensor, sequentially carried out line by line in exposure with pixel, due to the characteristics of reading data line by line,
Time for exposure difference of the Rolling shutter technology in image top and bottom is longer, so that there is opposite deformation to captured object.
Summary of the invention
For the defects in the prior art, the invention proposes a kind of methods and apparatus of light filling, are exposed with this by selecting
Light mode is the imaging sensor that full images pixel exposes simultaneously, and while use image sensor exposure, supplementary lighting sources
Just carry out light filling operation, it is ensured that have enough light when imaging sensor acquires each frame iris image to which obtain can be into
The clear iris image of row certification, and the energy has been saved, extend the service life of supplementary lighting sources.
Specifically, the invention proposes embodiments in detail below:
The embodiment of the present invention proposes a kind of method of light filling, applied to the figure for including supplementary lighting sources and being used to obtain image
As sensor iris authentication system in, wherein the Exposure mode of described image sensor be full images pixel expose simultaneously；Institute
Imaging sensor is stated to connect with the supplementary lighting sources, to realize time synchronization, this method comprises:
Determine point and end time point at the beginning of described image sensor is exposed when obtaining each frame image；
Control starts the supplementary lighting sources in the sart point in time, and closes the light filling in the end time point
Light source.
In a specific embodiment, the iris authentication system further includes iris recognition chip；Wherein, described image
Sensor and the supplementary lighting sources are separately connected the iris recognition chip；
The time started is the time that the iris recognition chip pins start iris recognition application to each frame image；Institute
Stating the end time is the time that the iris recognition chip pins terminate iris recognition application to each frame image.
In a specific embodiment,
It is described that " control starts the supplementary lighting sources in the sart point in time, and closes institute in the end time point
State supplementary lighting sources ", comprising:
Through the iris recognition chip while opening iris recognition application, the electricity of the supplementary lighting sources is opened
Source；
And the supplementary lighting sources are cut off while terminating iris recognition application by the iris recognition chip
Power supply.
In a specific embodiment, the supplementary lighting sources are infrared light light source.
In a specific embodiment, described image sensor is the cmos sensor using global shutter.
The equipment that the embodiment of the present invention also proposed a kind of light filling, applied to including supplementary lighting sources and for obtaining image
In the iris authentication system of imaging sensor, wherein the Exposure mode of described image sensor is that full images pixel exposes simultaneously；
Described image sensor is connect with the supplementary lighting sources, and to realize time synchronization, which includes:
Determining module, for determining that described image sensor is exposed at the beginning of point when obtaining each frame image
With end time point；
Supplementary lighting module starts the supplementary lighting sources in the sart point in time for controlling, and in the end time
Point closes the supplementary lighting sources.
In a specific embodiment, the iris authentication system further includes iris recognition chip；Wherein, described image
Sensor and the supplementary lighting sources are separately connected the iris recognition chip；
The time started is the time that the iris recognition chip pins start iris recognition application to each frame image；Institute
Stating the end time is the time that the iris recognition chip pins terminate iris recognition application to each frame image.
In a specific embodiment,
The supplementary lighting module, is used for:
Through the iris recognition chip while opening iris recognition application, the electricity of the supplementary lighting sources is opened
Source；
And the supplementary lighting sources are cut off while terminating iris recognition application by the iris recognition chip
Power supply.
In a specific embodiment, the supplementary lighting sources are infrared light light source.
In a specific embodiment, described image sensor is the cmos sensor using global shutter.
With this, the embodiment of the present invention proposes a kind of method and apparatus of light filling, applied to include supplementary lighting sources be used for
In the iris authentication system for obtaining the imaging sensor of image, wherein the Exposure mode of described image sensor is full images picture
Element exposes simultaneously；Described image sensor is connect with the supplementary lighting sources, to realize time synchronization, this method comprises: determining institute
State point and end time point at the beginning of imaging sensor is exposed when obtaining each frame image；Control is in the beginning
Time point starts the supplementary lighting sources, and closes the supplementary lighting sources in the end time point.With this by selecting exposure
Mode is the imaging sensor that full images pixel exposes simultaneously, and while using image sensor exposure, supplementary lighting sources are
Carry out light filling operation, it is ensured that have enough light to obtain to carry out when imaging sensor acquires each frame iris image
The clear iris image of certification, and the energy has been saved, extend the service life of supplementary lighting sources.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of flow diagram of the method for light filling that the embodiment of the present invention proposes；
Fig. 2 is the process signal of iris authentication system involved in a kind of method for light filling that the embodiment of the present invention proposes
Figure；
Fig. 3 is the schematic diagram that the frequency of light filling is carried out in a kind of method for light filling that the embodiment of the present invention proposes；
Fig. 4 is a kind of structural schematic diagram of the equipment for light filling that the embodiment of the present invention proposes.
Specific embodiment
Hereinafter, the various embodiments of the disclosure will be described more fully.The disclosure can have various embodiments, and
It can adjust and change wherein.It should be understood, however, that: there is no the various embodiments of the disclosure are limited to spy disclosed herein
Determine the intention of embodiment, but the disclosure should be interpreted as in the spirit and scope for covering the various embodiments for falling into the disclosure
All adjustment, equivalent and/or optinal plan.
The term used in the various embodiments of the disclosure is used only for the purpose of describing specific embodiments and not anticipates
In the various embodiments of the limitation disclosure.As used herein, singular is intended to also include plural form, unless context is clear
Chu it is indicated otherwise.Unless otherwise defined, otherwise all terms (including technical terms and scientific terms) used herein have
There is meaning identical with the various normally understood meanings of embodiment one skilled in the art of the disclosure.The term
(term such as limited in the dictionary generally used) is to be interpreted as having and situational meaning in the related technical field
Identical meaning and it will be interpreted as having Utopian meaning or meaning too formal, unless in the various of the disclosure
It is clearly defined in embodiment.
Embodiment 1
The embodiment of the present invention 1 discloses a kind of method of light filling, applied to including supplementary lighting sources and for obtaining image
In the iris authentication system of imaging sensor, wherein the Exposure mode of described image sensor is that full images pixel exposes simultaneously；
Described image sensor is connect with the supplementary lighting sources, to realize time synchronization, as shown in Figure 1, this method comprises:
Step 101 determines point and knot at the beginning of described image sensor is exposed when obtaining each frame image
Beam time point；
Step 101, control start the supplementary lighting sources in the sart point in time, and close in the end time point
The supplementary lighting sources.
Specifically, step 101 and step 102 carry out simultaneously, specifically when determining that imaging sensor starts exposure,
Then control starting supplementary lighting sources simultaneously, supplementary lighting sources then carry out it is luminous, to carry out light filling operation；And when determining imaging sensor knot
When beam exposes, light also is controlled than supplementary lighting sources simultaneously, terminates the operation of light filling.
In order to guarantee temporal consistency, as shown in Fig. 2, may be implemented to connect imaging sensor and the supplementary lighting sources
It connects, to realize time synchronization.
Further, as shown in Fig. 2, the iris authentication system further includes iris recognition chip；Wherein, described image passes
Sensor and the supplementary lighting sources are separately connected the iris recognition chip；
The time started is the time that the iris recognition chip pins start iris recognition application to each frame image；Institute
Stating the end time is the time that the iris recognition chip pins terminate iris recognition application to each frame image.
With this, specifically, in step 102 it is described " control starts the supplementary lighting sources in the sart point in time, and
The supplementary lighting sources are closed in the end time point ", comprising:
Through the iris recognition chip while opening iris recognition application, the electricity of the supplementary lighting sources is opened
Source；
And the supplementary lighting sources are cut off while terminating iris recognition application by the iris recognition chip
Power supply.
Specifically, the supplementary lighting sources are infrared light light source.
Specifically, described image sensor is the cmos sensor using global shutter.
Specifically, imaging sensor can be Global Shutter CMOS Sensor namely global shutter CMOS
(Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor) sensor.
Specifically, passing through the synchronous cmos image sensor using global shutter in another specific embodiment
The lighting time of time for exposure and supplementary lighting sources carry out light filling to captured every frame image.
As shown in figure 3, using the Exposure mode and traditional ccd image sensor of the cmos image sensor of global shutter
Identical, all pixels in image expose beginning and end simultaneously.
And the working principle of cmos image sensor is that whole image pixel is reset before the exposure of every frame picture, is being exposed
The charge of each accumulation is transferred to storage area after end, in pipelined fashion reads signal from storage area.
In the present solution, acquisition iris image needed for infrared light light source lighting time and image sensor exposure times
Unanimously.In sensor exposure time, supplementary lighting sources are in illuminating state, in resetting image and sensor transmissions signal process
Supplementary lighting sources are then in low bright state.Ensure there are enough infrared lights when sensor acquires each frame iris image by this method
To obtain the image that can be authenticated, while the service life of supplementary lighting sources is extended, also reduces the power consumption of system.
As shown in Fig. 2, iris authentication system may include: the cmos image sensor using global shutter, supplementary lighting sources,
Iris recognition chip.
Specific iris authentication system can also include application processor.
Wherein, the supplementary lighting sources are connect with imaging sensor, with synchronous sensor time for exposure and light source lighting time.
Described image sensor is connected with iris recognition chip, is used for transmission acquired iris image and according to the analysis knot in chip
Fruit adjusts sensor parameters.The supplementary lighting sources are connected with iris recognition chip, and iris recognition chip is answered in starting iris recognition
Used time will open the power supply of supplementary lighting sources, and the power supply of supplementary lighting sources is cut off at the end of iris recognition application.The iris recognition
Chip is connected with application processor, the former latter transmits comparison result.
Embodiment 2
The embodiment of the present invention 2 also discloses a kind of equipment of light filling, applied to including supplementary lighting sources and for obtaining image
Imaging sensor iris authentication system in, wherein the Exposure mode of described image sensor be full images pixel expose simultaneously
Light；Described image sensor is connect with the supplementary lighting sources, to realize time synchronization, as shown in figure 4, the equipment includes:
Determining module 201, at the beginning of for determining that described image sensor is exposed when obtaining each frame image
Between point with end time point；
Supplementary lighting module 202 starts the supplementary lighting sources in the sart point in time for controlling, and at the end of described
Between point close the supplementary lighting sources.
In a specific embodiment, the iris authentication system further includes iris recognition chip；Wherein, described image
Sensor and the supplementary lighting sources are separately connected the iris recognition chip；
The time started is the time that the iris recognition chip pins start iris recognition application to each frame image；Institute
Stating the end time is the time that the iris recognition chip pins terminate iris recognition application to each frame image.
In a specific embodiment,
The supplementary lighting module 202, is used for:
Through the iris recognition chip while opening iris recognition application, the electricity of the supplementary lighting sources is opened
Source；
And the supplementary lighting sources are cut off while terminating iris recognition application by the iris recognition chip
Power supply.
In a specific embodiment, the supplementary lighting sources are infrared light light source.
In a specific embodiment, described image sensor is the cmos sensor using global shutter.
With this, the embodiment of the present invention proposes a kind of method and apparatus of light filling, applied to include supplementary lighting sources be used for
In the iris authentication system for obtaining the imaging sensor of image, wherein the Exposure mode of described image sensor is full images picture
Element exposes simultaneously；Described image sensor is connect with the supplementary lighting sources, to realize time synchronization, this method comprises: determining institute
State point and end time point at the beginning of imaging sensor is exposed when obtaining each frame image；Control is in the beginning
Time point starts the supplementary lighting sources, and closes the supplementary lighting sources in the end time point.With this by selecting exposure
Mode is the imaging sensor that full images pixel exposes simultaneously, and while using image sensor exposure, supplementary lighting sources are
Carry out light filling operation, it is ensured that have enough light to obtain to carry out when imaging sensor acquires each frame iris image
The clear iris image of certification, and the energy has been saved, extend the service life of supplementary lighting sources.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Aforementioned present invention serial number is for illustration only, does not represent the superiority and inferiority of implement scene.
Disclosed above is only several specific implementation scenes of the invention, and still, the present invention is not limited to this, Ren Heben
What the technical staff in field can think variation should all fall into protection scope of the present invention.
Claims (10)
1. a kind of method of light filling, which is characterized in that applied to the imaging sensor for including supplementary lighting sources and being used to obtain image
Iris authentication system in, wherein the Exposure mode of described image sensor be full images pixel expose simultaneously；Described image passes
Sensor is connect with the supplementary lighting sources, to realize time synchronization, this method comprises:
Determine point and end time point at the beginning of described image sensor is exposed when obtaining each frame image；
Control starts the supplementary lighting sources in the sart point in time, and closes the light filling light in the end time point
Source.
2. a kind of method of light filling as described in claim 1, which is characterized in that the iris authentication system further includes that iris is known
Other chip；Wherein, described image sensor and the supplementary lighting sources are separately connected the iris recognition chip；
The time started is the time that the iris recognition chip pins start iris recognition application to each frame image；The knot
The beam time is the time that the iris recognition chip pins terminate iris recognition application to each frame image.
3. a kind of method of light filling as claimed in claim 2, which is characterized in that
It is described that " control starts the supplementary lighting sources in the sart point in time, and closes the benefit in the end time point
Radiant ", comprising:
Through the iris recognition chip while opening iris recognition application, the power supply of the supplementary lighting sources is opened；
And the electricity of the supplementary lighting sources is cut off while terminating iris recognition application by the iris recognition chip
Source.
4. a kind of method of light filling as described in claim 1, which is characterized in that the supplementary lighting sources are infrared light light source.
5. a kind of method of light filling as described in claim 1, which is characterized in that described image sensor is using global shutter
Cmos sensor.
6. a kind of equipment of light filling, which is characterized in that applied to the imaging sensor for including supplementary lighting sources and being used to obtain image
Iris authentication system in, wherein the Exposure mode of described image sensor be full images pixel expose simultaneously；Described image passes
Sensor is connect with the supplementary lighting sources, and to realize time synchronization, which includes:
Determining module, point and knot at the beginning of for determining that described image sensor is exposed when obtaining each frame image
Beam time point；
Supplementary lighting module starts the supplementary lighting sources in the sart point in time for controlling, and closes in the end time point
Close the supplementary lighting sources.
7. a kind of equipment of light filling as claimed in claim 6, which is characterized in that the iris authentication system further includes that iris is known
Other chip；Wherein, described image sensor and the supplementary lighting sources are separately connected the iris recognition chip；
The time started is the time that the iris recognition chip pins start iris recognition application to each frame image；The knot
The beam time is the time that the iris recognition chip pins terminate iris recognition application to each frame image.
8. a kind of equipment of light filling as claimed in claim 7, which is characterized in that
The supplementary lighting module, is used for:
Through the iris recognition chip while opening iris recognition application, the power supply of the supplementary lighting sources is opened；
And the electricity of the supplementary lighting sources is cut off while terminating iris recognition application by the iris recognition chip
Source.
9. a kind of equipment of light filling as claimed in claim 6, which is characterized in that the supplementary lighting sources are infrared light light source.
10. a kind of equipment of light filling as claimed in claim 6, which is characterized in that described image sensor is using global fast
The cmos sensor of door.
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| CN201810739799.4A CN109165548A (en) | 2018-07-06 | 2018-07-06 | A kind of method and apparatus of light filling |
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| CN201810739799.4A CN109165548A (en) | 2018-07-06 | 2018-07-06 | A kind of method and apparatus of light filling |
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