CN107343132A - A kind of hand identification device and method based on near-infrared LED light compensating lamp - Google Patents
A kind of hand identification device and method based on near-infrared LED light compensating lamp Download PDFInfo
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- CN107343132A CN107343132A CN201710751323.8A CN201710751323A CN107343132A CN 107343132 A CN107343132 A CN 107343132A CN 201710751323 A CN201710751323 A CN 201710751323A CN 107343132 A CN107343132 A CN 107343132A
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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
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
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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
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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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
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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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
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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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
- H04N23/72—Combination of two or more compensation controls
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Human Computer Interaction (AREA)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses a kind of hand identification device and method based on near-infrared LED light compensating lamp, including：Near-infrared LED light compensating lamp, the pulse power, the first control module and the image capture module for supporting global exposure；The pulse power, for providing pulse current for the near-infrared LED light compensating lamp；The near-infrared LED light compensating lamp, for sending the first incident light palm in one's hands of preset strength；First control module communicates to connect with the near-infrared LED light compensating lamp and described image acquisition module, for controlling the exposure of described image acquisition module to be lighted while carried out by pulse current with the near-infrared LED light compensating lamp；Described image acquisition module, for receiving the reflected light after palmar and changing into palm image.Solves the technical problem that palm image overexposure, brightness irregularities or the dazzle that existing hand identification device is got cause the difficult even None- identified of palm image recognition.
Description
Technical field
The present invention relates to technical field of security authentication, more particularly to a kind of hand identification based on near-infrared LED light compensating lamp
Device and method.
Background technology
In technical field of security authentication, based on it is non-contact and easy to use the advantages of, the application of hand identification is increasingly
Extensively.Under normal circumstances, hand identification is to carry out light filling using near-infrared LED lamp, and passes through imaging sensor (CMOS
Sensor the image of palm) is obtained, is then transmit in the processor of rear end and is handled and be identified comparison.
In traditional palm pattern recognition device, near-infrared LED lamp is usually continuous work, in order to reduce light decay effect
And avoid near-infrared LED lamp from generating heat, so the power output of near-infrared LED lamp is limited.Although some types are by increasing people
Body induction installation so that near-infrared LED lamp can work with discontinuous operation or with slightly lower brightness low-power consumption, but due to CMOS
Sensor rolls exposure principle using Rolling Shutter and carries out capture, and the most short working time of near-infrared LED lamp is generally also
More than 10 milliseconds or more, so still near-infrared LED lamp can not be caused to send stronger infrared light.
When using palm pattern recognition device out of doors, the palm image that the strong light interference of sunshine causes to get produces
The problems such as overexposure, brightness disproportionation uniform dazzle so that the difficult even None- identified of palm image recognition.
The content of the invention
The invention provides a kind of hand identification device and method based on near-infrared LED light compensating lamp, solves existing hand
Palm image overexposure, brightness irregularities or the dazzle that palm identification device is got cause palm image recognition difficult or even can not known
Other technical problem.
The invention provides a kind of hand identification device based on near-infrared LED light compensating lamp, including：Near-infrared LED light filling
Lamp, the pulse power, the first control module and the image capture module for supporting global exposure；
The pulse power, for providing pulse current for the near-infrared LED light compensating lamp；
The near-infrared LED light compensating lamp, for sending the first incident light palm in one's hands of preset strength；
First control module communicates to connect with the near-infrared LED light compensating lamp and described image acquisition module, uses
Lighted while carried out by pulse current with the near-infrared LED light compensating lamp in control described image acquisition module exposure；
Described image acquisition module, for receiving the reflected light after palmar and changing into palm image.
Preferably,
The hand identification device based on near-infrared LED light compensating lamp, in addition to：Palm is arranged on to gather with described image
Optical filter between module, for being filtered to the reflected light after palmar so that the reflected light of preset wavelength passes through.
Preferably,
The hand identification device based on near-infrared LED light compensating lamp, in addition to：Connect with the near-infrared LED light compensating lamp
The second control module connect, for counting lighting time of the near-infrared LED light compensating lamp within the unit pulse cycle, if described
Lighting time more than the first preset time, then closes the near-infrared LED light compensating lamp until the next pulse period starts.
Preferably,
The near-infrared LED light compensating lamp is at least one, and is arranged in array.
Preferably,
The hand identification device based on near-infrared LED light compensating lamp, in addition to display device and with described image gather
The processor of module communication connection；
The processor, the palm image for described image acquisition module to be exported are pre-processed, then will located in advance
Palm image after reason is compared one by one with all prediction pictures；
The display device is connected with the processor communication, for showing the comparison result of the processor.
Preferably,
The optical filter is width optical filter.
The invention provides a kind of hand identification method based on near-infrared LED light compensating lamp, including：
The first incident light palm in one's hands of preset strength is sent by pulse current control near-infrared LED light compensating lamp；
Control exposure is lighted while carried out by pulse current with the near-infrared LED light compensating lamp, is then received anti-through palm
Reflected light after penetrating simultaneously changes into palm image.
Preferably,
After receiving the reflected light after palmar and changing into palm image, in addition to：
Reflected light after palmar is filtered so that the reflected light of preset wavelength passes through.
Preferably,
Receive the reflected light after palmar and change into palm image and be specially：
The reflected light after handling palmar reflex is being received in palm 15cm and is changing into palm image.
Preferably,
The same of the first incident light palm in one's hands of preset strength is being sent by pulse current control near-infrared LED light compensating lamp
When, in addition to：
Lighting time of the near-infrared LED light compensating lamp within the unit pulse cycle is counted, if the lighting time exceedes
First preset time, then the near-infrared LED light compensating lamp is closed until the next pulse period starts.
As can be seen from the above technical solutions, the present invention has advantages below：
The first incident light palm in one's hands of preset strength is sent by pulse current control near-infrared LED light compensating lamp, then
Control image capture module exposure is lighted while carried out by pulse current with near-infrared LED light compensating lamp, because image capture module
Support global exposure, it is possible to so that image capture module is lighted in a flash in near-infrared LED light compensating lamp by pulse current
Receive the reflected light after palmar and change into palm image, so compared to the present palm image recognition for rolling exposure
Device, the hand identification device in the present invention allows near-infrared LED light compensating lamp to work very short time, so as to ensure near-infrared
In the case that LED light supplement lamp mean power is very low, it is ring that near-infrared LED light compensating lamp can be made, which to send intensity in a short time to be more than,
The infrared light of border luminous intensity so that under stronger ambient light, can also collect preferable palm image, more conducively palm
The identification of image, solving palm image overexposure, brightness irregularities or dazzle that existing hand identification device is got causes hand
The technical problem of the difficult even None- identified of image recognition is slapped, effectively lifts the anti-strong light interference performance of hand identification device.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is that a kind of structure of the hand identification device based on near-infrared LED light compensating lamp provided in an embodiment of the present invention is shown
It is intended to；
Fig. 2 is that a kind of application of the hand identification device based on near-infrared LED light compensating lamp provided in an embodiment of the present invention is shown
It is intended to；
Fig. 3 is that a kind of hand identification method first based on near-infrared LED light compensating lamp provided in an embodiment of the present invention is implemented
The schematic flow sheet of example；
Fig. 4 is that a kind of hand identification method second based on near-infrared LED light compensating lamp provided in an embodiment of the present invention is implemented
The schematic flow sheet of example.
Embodiment
The embodiments of the invention provide a kind of hand identification device and method based on near-infrared LED light compensating lamp 2, pass through arteries and veins
The first incident light palm in one's hands that current control near-infrared LED light compensating lamp 2 sends preset strength is rushed, then controls IMAQ mould
The exposure of block 3 is lighted while carried out by pulse current with near-infrared LED light compensating lamp 2, because image capture module 3 supports global exposure
Light, it is possible to so that image capture module 3 is handled in the reception in a flash that near-infrared LED light compensating lamp 2 is lighted by pulse current
Reflected light after palmar reflex simultaneously changes into palm image, so compared to the present palm pattern recognition device for rolling exposure, this
Hand identification device in invention allows near-infrared LED light compensating lamp 2 to work very short time, so as to ensure near-infrared LED light filling
In the case that the mean power of lamp 2 is very low, it is ambient light that near-infrared LED light compensating lamp 2 can be made, which to send intensity in a short time to be more than,
The infrared light of intensity so that under stronger ambient light, can also collect preferable palm image, more conducively palm image
Identification, solving palm image overexposure, brightness irregularities or dazzle that existing hand identification device is got causes palm figure
As the technical problem of the difficult even None- identified of identification.
To enable goal of the invention, feature, the advantage of the present invention more obvious and understandable, below in conjunction with the present invention
Accompanying drawing in embodiment, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that disclosed below
Embodiment be only part of the embodiment of the present invention, and not all embodiment.Based on the embodiment in the present invention, this area
All other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
Referring to Fig. 1, a kind of hand identification device based on near-infrared LED light compensating lamp 2 provided in an embodiment of the present invention
Structural representation；
Referring to Fig. 2, a kind of hand identification device based on near-infrared LED light compensating lamp 2 provided in an embodiment of the present invention
Application schematic diagram；
A kind of hand identification device based on near-infrared LED light compensating lamp 2 provided in an embodiment of the present invention, including：Near-infrared
LED light supplement lamp 2, the pulse power 1, the first control module 4 and the image capture module 3 for supporting global exposure.
In the present embodiment, hand identification device carries out light filling using infrared LED light, relative to using infrared laser
Light filling, divergence are more preferable.According to infrared laser light filling, because the divergence of infrared laser is minimum, only about 0.001 arc
Degree, close to parallel, so needing plano-concave lens to carry out diverging light filling to laser.So the present invention is using infrared LED light compensating lamp
Light carries out light filling and relatively carries out light filling using infrared laser, and effect is more preferable, improves cost performance.
Near-infrared LED light compensating lamp 2 can select the near-infrared LED lamp with multiple operation wavelengths, such as operation wavelength can
Think 810nm, 850nm, 940nm, bandwidth is not more than 50nm, and half-power angle is not more than 60 degree.
Near-infrared LED light compensating lamp 2, for sending the first incident light palm in one's hands of preset strength.
Preset strength is determined by the size of pulse current, in order to reach more preferable palm image recognition effect, first
The intensity of incident light, which generally requires, reaches at least 2 times or more of ambient light intensity, it is possible to corresponding to select suitable pulse
Electric current.
The pulsing light time of near-infrared LED light compensating lamp 2 is generally no greater than 100us.
The pulse power 1, for providing pulse current for near-infrared LED light compensating lamp 2.
First control module 4 can be control circuit or the chip for being encoded with program.
First control module 4 communicates to connect with near-infrared LED light compensating lamp 2 and image capture module 3, for controlling image
The exposure of acquisition module 3 is lighted while carried out by pulse current with near-infrared LED light compensating lamp 2.
The control exposure of image capture module 3 is lighted by pulse current with near-infrared LED light compensating lamp 2 while has carried out two kinds of sides
Method, first method are only to control the time for exposure of image capture module 3, do not adjust the break-make of near-infrared LED light compensating lamp 2, the
Two kinds of methods are to set the time for exposure of image capture module 3, by the break-make for controlling near-infrared LED light compensating lamp 2.
Image capture module 3 specifically includes image acquisition circuit, optical lens 9 and the image acquisition device for supporting global exposure
8。
Image capture module 3, for receiving the reflected light after palmar and changing into palm image.
It is understood that transmitting light can be converted into hand by image capture module 3 by opto-electronic conversion, analog-to-digital conversion
Slap image.
Further, near-infrared LED light compensating lamp 2 is at least one, and is arranged in array.
Array arrangement can reach more preferable light filling effect, lift instantaneous intensity of illumination.
In order to ensure preferable light filling effect, the quantity for the near-infrared LED light compensating lamp 2 being typically arranged in array is no less than 50
It is individual.
In addition, in another embodiment of the present invention, the hand identification device based on near-infrared LED light compensating lamp 2, may be used also
With including：The optical filter 6 being arranged between palm and image capture module 3, for being carried out to the reflected light after palmar
Filtering so that the reflected light of preset wavelength passes through.
Optical filter 6 can only to enter image capture module 3 with the first incident light operation wavelength identical ambient light
Imaging, greatly reduces the interference of ambient light.
Further, optical filter 6 is width optical filter.
It is corresponding with the operation wavelength of the first incident light, the center of width optical filter filter length can be 810nm, 850nm,
940nm, bandwidth are not more than 50nm, and transmitance is not less than 50%；Wherein, select center filter a length of 940nm width optical filter compared with
It is good.
In addition, in another embodiment of the present invention, the hand identification device based on near-infrared LED light compensating lamp 2, may be used also
With including：The second control module 5 being connected with near-infrared LED light compensating lamp 2, for counting near-infrared LED light compensating lamp 2 in unit arteries and veins
The lighting time rushed in the cycle, if lighting time, more than the first preset time, closing near-infrared LED light compensating lamp 2 is until next time
Pulse period starts.
Second control module 5 can be control circuit or the chip for being encoded with program.
If the long-time of near-infrared LED light compensating lamp 2 with high power work, can cause because of excessively stream or cross cause thermal damage, so the
Two control modules 5 can effectively protect near-infrared LED light compensating lamp 2.Because the near-infrared LED light compensating lamp 2 in the present invention works
Under pulse current, so operating power of the near-infrared LED light compensating lamp 2 within the pulse period is generally large, therefore the second control
Module 5 is most important to the hand identification device in the present invention, can preferably ensure hand identification device normal work, increase
The life-span of hand identification device.
Heat dissipation problem during in view of near-infrared LED light compensating lamp high power work, the first preset time can be with hand identification
Device working environment is set, for example, hand identification device operating ambient temperature is higher, the first preset time can be set
Ground is shorter；If hand identification device is operated in winter makes outdoor, because environment temperature is low, radiating is preferable, thus first it is default when
Between can be configured longer.
In order to reduce influence of the environmental light brightness to image capture module 3 as far as possible, and extend infrared LED as far as possible and mend
The life-span of light lamp 2, the brightness of infrared LED light compensating lamp 2 can change according to the change of ambient brightness.When environmental light brightness is stronger
When, power that will heighten infrared LED light compensating lamp 2 and illuminate avoids influenceing image by ambient light；When environmental light brightness is relatively low
When, power infrared LED light compensating lamp 2 will be turned down illuminating, improve life-span of infrared LED light compensating lamp 2.
In addition, in another embodiment of the present invention, the hand identification device based on near-infrared LED light compensating lamp 2, may be used also
With including：Display device and the processor 7 communicated to connect with image capture module 3.
Processor 7, the palm image for image capture module 3 to be exported are pre-processed, then will be pretreated
Palm image is compared one by one with all prediction pictures.
Display device and image capture module 3 can be communicatively coupled by wired, can also be by wirelessly being led to
Letter connection.
If display device and image capture module 3 are communicatively coupled by wired, in order to receive 3 turns of image capture module
The palm image of change, can select the processor 7 of the multiple images interface such as DVP, CSI and MIPI, and the interface of processor 7 also has very
It is more, do not enumerate herein.
Display device communicates to connect with processor 7, the comparison result for video-stream processor 7.
Comparison result can be the prediction picture most like with palm image and similarity index.
The above is that the structure and connected mode of a kind of hand identification device based on near-infrared LED light compensating lamp 2 are carried out
Describe in detail, for ease of understanding, a kind of palm based on near-infrared LED light compensating lamp 2 will be known with a concrete application scene below
The application of other device illustrates, and application examples includes：
By palm close to image capture module 3 so that the distance of palm range image acquisition module 3 is within 15cm.So
Control near-infrared LED light compensating lamp 2 to be lighted by pulse current and send the first incident light palm in one's hands afterwards, and controlled while lighting
Imaged acquisition module 3 is exposed, and image capture module 3 can be collected first after palmar through the anti-of the filtering of optical filter 6
Light is penetrated, finally by reflected light and palm image is changed into, is output to processor 7 and is identified, and show knowledge in a display device
Other result.
A kind of referring to Fig. 3, hand identification method first based on near-infrared LED light compensating lamp provided in an embodiment of the present invention
The schematic flow sheet of embodiment；
A kind of hand identification method based on near-infrared LED light compensating lamp provided in an embodiment of the present invention, including：
S101, the first incident light palm in one's hands of preset strength is sent by pulse current control near-infrared LED light compensating lamp.
S102, control exposure are lighted while carried out by pulse current with near-infrared LED light compensating lamp, then receive anti-through palm
Reflected light after penetrating simultaneously changes into palm image.
Control process can be realized by control circuit, can also be to realize by control program.
A kind of referring to Fig. 4, hand identification method second based on near-infrared LED light compensating lamp provided in an embodiment of the present invention
The schematic flow sheet of embodiment；
A kind of hand identification method based on near-infrared LED light compensating lamp provided in an embodiment of the present invention, including：
S201, the first incident light palm in one's hands of preset strength is sent by pulse current control near-infrared LED light compensating lamp.
S202, control exposure is lighted while carried out by pulse current with near-infrared LED light compensating lamp, to after palmar
Reflected light is filtered so that then the reflected light of preset wavelength in palm 15cm by receiving after filtering anti-
Penetrate light and change into palm image.
Distance controlling will be received in 15cm, it is ensured that the palm image for being converted to has preferable brightness.
S203, lighting time of the statistics near-infrared LED light compensating lamp within the unit pulse cycle, if lighting time is more than first
Preset time, then near-infrared LED light compensating lamp is closed until the next pulse period starts.
More than, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to foregoing reality
Example is applied the present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each
Technical scheme described in embodiment is modified, or carries out equivalent substitution to which part technical characteristic；And these are changed
Or replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
- A kind of 1. hand identification device based on near-infrared LED light compensating lamp, it is characterised in that including：Near-infrared LED light compensating lamp, The pulse power, the first control module and the image capture module for supporting global exposure；The pulse power, for providing pulse current for the near-infrared LED light compensating lamp；The near-infrared LED light compensating lamp, for sending the first incident light palm in one's hands of preset strength；First control module communicates to connect with the near-infrared LED light compensating lamp and described image acquisition module, for controlling Described image acquisition module exposure processed is lighted while carried out by pulse current with the near-infrared LED light compensating lamp；Described image acquisition module, for receiving the reflected light after palmar and changing into palm image.
- 2. the hand identification device according to claim 1 based on near-infrared LED light compensating lamp, it is characterised in that also include： The optical filter being arranged between palm and described image acquisition module, for being filtered to the reflected light after palmar, So that the reflected light of preset wavelength passes through.
- 3. the hand identification device according to claim 1 based on near-infrared LED light compensating lamp, it is characterised in that also include： The second control module being connected with the near-infrared LED light compensating lamp, for counting the near-infrared LED light compensating lamp in unit pulse Lighting time in cycle, if the lighting time more than the first preset time, close the near-infrared LED light compensating lamp until The next pulse period starts.
- 4. the hand identification device according to claim 1 based on near-infrared LED light compensating lamp, it is characterised in that described near Infrared LED light compensating lamp is at least one, and is arranged in array.
- 5. the hand identification device according to claim 1 based on near-infrared LED light compensating lamp, it is characterised in that also include Display device and the processor with the communication connection of described image acquisition module；The processor, the palm image for described image acquisition module to be exported are pre-processed, after then pre-processing Palm image compared one by one with all prediction pictures；The display device is connected with the processor communication, for showing the comparison result of the processor.
- 6. the hand identification device according to claim 2 based on near-infrared LED light compensating lamp, it is characterised in that the filter Mating plate is width optical filter.
- A kind of 7. hand identification method based on near-infrared LED light compensating lamp, it is characterised in that including：The first incident light palm in one's hands of preset strength is sent by pulse current control near-infrared LED light compensating lamp；Control exposure is lighted while carried out by pulse current with the near-infrared LED light compensating lamp, is then received after palmar Reflected light and change into palm image.
- 8. the hand identification method according to claim 7 based on near-infrared LED light compensating lamp, it is characterised in that receiving Reflected light after palmar is simultaneously changed into after palm image, in addition to：Reflected light after palmar is filtered so that the reflected light of preset wavelength passes through.
- 9. the hand identification method according to claim 7 based on near-infrared LED light compensating lamp, it is characterised in that receive warp Reflected light after palmar simultaneously changes into palm image and is specially：The reflected light after handling palmar reflex is being received in palm 15cm and is changing into palm image.
- 10. the hand identification method according to claim 7 based on near-infrared LED light compensating lamp, it is characterised in that passing through While pulse current control near-infrared LED light compensating lamp sends the first incident light palm in one's hands of preset strength, in addition to：Lighting time of the near-infrared LED light compensating lamp within the unit pulse cycle is counted, if the lighting time is more than first Preset time, then the near-infrared LED light compensating lamp is closed until the next pulse period starts.
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| CN201710751323.8A CN107343132B (en) | 2017-08-28 | 2017-08-28 | Palm recognition device and method based on near-infrared LED light supplementing lamp |
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| CN201710751323.8A CN107343132B (en) | 2017-08-28 | 2017-08-28 | Palm recognition device and method based on near-infrared LED light supplementing lamp |
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| CN107343132B CN107343132B (en) | 2023-06-09 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108737740A (en) * | 2018-07-10 | 2018-11-02 | 银河水滴科技（北京）有限公司 | A kind of image light compensation method and system |
| CN108989633A (en) * | 2018-06-27 | 2018-12-11 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle-mounted fatigue detection device and its detection method |
| WO2020119504A1 (en) * | 2018-12-12 | 2020-06-18 | 杭州海康威视数字技术股份有限公司 | Image processing method and system |
| CN117129191A (en) * | 2023-10-24 | 2023-11-28 | 徐州徐工汽车制造有限公司 | Infrared lamp fault diagnosis method, controller, camera system and storage medium |
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