CN104463083A - Non-contact palm print authentication method and device and portable terminal - Google Patents
Non-contact palm print authentication method and device and portable terminal Download PDFInfo
- Publication number
- CN104463083A CN104463083A CN201310439509.1A CN201310439509A CN104463083A CN 104463083 A CN104463083 A CN 104463083A CN 201310439509 A CN201310439509 A CN 201310439509A CN 104463083 A CN104463083 A CN 104463083A
- Authority
- CN
- China
- Prior art keywords
- palmprint
- camera
- image
- illuminating lamp
- state parameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
- G06V40/1365—Matching; Classification
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Studio Devices (AREA)
Abstract
The invention provides a non-contact palm print authentication method and device and a portable terminal. The non-contact palm print authentication device is applied to the portable terminal comprising a camera and an illuminating lamp. The non-contact palm print authentication method comprises the steps that the camera is enabled when a palm print authentication process starts, and it is maintained that the working state of the illuminating lamp is set as the illuminating mode when external light is insufficient so that the illuminating lamp can supply supplementary lighting output to the camera; a new image is selected from a video stream output by the camera as a candidate image, a current state parameter set of the camera is obtained specific to the candidate image, whether each state parameter in the set meets the corresponding preset standard is judged, and if yes, the candidate image is used as a comparison palm print image of palm print matching to be output; the comparison palm print image is matched with one or more reference palm print images input in advance for user authentication. The non-contact palm print authentication method and device and the portable terminal can effectively improve the output quality of the comparison palm print image, thereby improving the performance of the non-contact palm print authentication technology.
Description
Technical field
The present invention relates to portable terminal device identity identifying technology field, particularly relate to a kind of contactless palmprint authentication method and the device that are applicable to portable terminal device.
Background technology
Along with the change of mobile communication technology, such as the portable terminal device such as smart mobile phone, flat computer is becoming the important tool of people's daily life and work.Such as, except the application of the tradition such as phone and note, people can utilize smart mobile phone to carry out the multiple application such as network social intercourse, online shopping and on-line payment.Portable terminal device may have been deposited a large amount of valuable operational data or private data, therefore, user more and more pays close attention to the information security on portable terminal device, wishes that these need data of protection when not by cannot be accessed when authentication.
In traditional mode, portable terminal device adopts the array mode of password or user name and password to carry out identifying user identity.The problem of this mode is embodied between its security and convenience and there is natural contradiction.First, if user wants to improve security, then need to arrange complicated password, such as password is the combination of letter, numeral and special symbol, even may also need subalphbet to be capitalization; Secondly, at different authentication entrances, user may need to use the password not having relevance; For example, subscriber mailbox password and QQ password preferably do not have relevance, otherwise once wherein certain password known by other people, another password is easy to be guessed.
In the application that the security requirement such as on-line payment and Mobile banking is very harsh, the mode of Multi Identity Attestation can be adopted, except user log-in authentication, also can introduce payment cipher double authentication.A lot of on-line payment at present also needs to carry out certification by the mode of short message sending identifying code.Go in this case, user wants the experience obtaining safety, must accept the safety practice that these are strict but not convenient.
Some developer current and manufacturer are just attempting on portable terminal device, introduce finger print identifying mode and are carrying out alternative traditional usemame/password authentication mode.The convenience of this authentication mode is better, but its security reduces greatly.This is because, portable terminal device uses finger print identifying, is obtained by other people once portable terminal device is lost, to leave self fingerprint a large amount of during portable terminal device because user uses before this, these fingerprints are easy to be gathered rear utilization by other people, cause finger print identifying to perform practically no function.In fact, the feature that public security organ utilizes fingerprint easily to leave over just, sets up fingerprint database to assist and carries out various cracking of cases.In addition, there is the high problem of implementation cost in finger print identifying, in order to support finger print identifying, portable terminal device needs additional configuration fingerprint recognition hardware, and the global design of corresponding adjustment portable terminal device, this not only with portable terminal device lightening trend opposing, also introduce development and Design cost raise problem.
Therefore, in general, traditional authenticating user identification technology all cannot solve the contradiction between convenience and security.
Summary of the invention
In view of this, the invention provides a kind of contactless palmprint authentication device, be applied to comprise camera and illuminating lamp portable terminal device on, this device comprises:
Gather control module, for described camera enable when palmprint authentication flow process is opened, and keep the duty of described illuminating lamp to be set to light illumination mode when outside illumination deficiency, thus provide light filling to export for described camera;
Screening output unit, a frame new images alternatively image is selected in the video flowing that exports from described camera, the current state parameter set of described camera is obtained for this candidate image, judge whether each state parameter in this set meets the preset standard corresponding with this parameter, if all met, the contrast palmprint image of candidate image as palmprint match is exported, if any one state parameter in this set does not meet corresponding preset standard, then ignore this candidate image, and reselect a frame new images alternatively image; And
Palmprint match unit, for being mated with one or more benchmark palmprint images of typing in advance by described contrast palmprint image according to preset algorithm, if the match is successful, then determines that certification is passed through; If it fails to match, unsuccessfully point out to user's authentication output or return screening output unit.
The present invention also provides a kind of contactless palmprint authentication method, be applied to comprise camera and illuminating lamp portable terminal device on, wherein the method comprises the following steps:
Steps A, the enable described camera when palmprint authentication flow process is opened, and keep the duty of described illuminating lamp to be set to light illumination mode when outside illumination is not enough, thus provide light filling to export for described camera;
Step B, selects a frame new images alternatively image from the video flowing that described camera exports;
Step C, the current state parameter set of described camera is obtained for this candidate image, judge whether each state parameter in this set meets the preset standard corresponding with this parameter, if all met, the contrast palmprint image of this candidate image as palmprint match is exported, if any one state parameter in this set does not meet corresponding preset standard, then ignore this candidate image and return step B; And
Step D, mates described contrast palmprint image with the benchmark palmprint image of typing in advance according to preset algorithm, if the match is successful, then determines that certification is passed through; If it fails to match, unsuccessfully point out to user's authentication output or return step B.
The present invention can effectively promote the output quality contrasting palmprint image in contactless palmprint authentication, thus promotes the performance of contactless palmprint authentication technology.
Accompanying drawing explanation
Fig. 1 is a kind of typical application scenarios figure of the present invention.
Fig. 2 is the logical organization of contactless palmprint authentication device and the schematic diagram of underlying hardware environment thereof in one embodiment of the present invention.
Fig. 3 is the process flow diagram of contactless palmprint authentication method in one embodiment of the present invention.
Fig. 4 is the process flow diagram of contactless palmprint authentication method in another embodiment of the present invention.
Embodiment
In order to solve the problem of prior art, current industry also realizes authenticating user identification in technology such as research recognitions of face.But this technology still inherently cannot improve the natural contradiction of convenience and security.For recognition of face, in its security, Problems existing is, obtaining of user's facial image is also relatively easy, user may in internet or other-end be upper deposits self photo a large amount of, these photos may be got easily by other people, and such disabled user just can utilize these photos to pretend and pass through face authentication.
For fingerprint, face, palmmprint is very little by the possibility that other people obtain.This is because first, people are in the process using portable terminal device, and its operation by human hand major part depends on finger.Secondly, in daily life, people are when using hand, and palm is in collapse state to a certain degree usually, even if leave palmmprint, the palmmprint when palmmprint stayed and palm open is completely different, is difficult to pass through authentication for camouflage.In addition, user generally can not preserve palm photo clearly, thus also can not there is photo and be obtained and the drawback that is used by other people.
But the actualizing technology of current palmprint authentication still will rely on special hardware device, this can cause the higher and inadequate problem easily of cost equally.Such as Chinese patent application discloses No. CN101833647A and discloses the disposal route that a kind of palmmprint obtains equipment and correspondence.In this scheme, although improve in conventional art the shortcoming needing to shield surround lighting, but still need to introduce special hardware, use the mode of flashlamp or external infrared LED to complete palmprint authentication process, and remain the realization of contact palmprint authentication.In contact palmprint authentication technology, user's palm needs to be fixed on the position of distance camera preset distance by a specific positioning element (such as hand mounting table), and user's palm cannot be freely movable.Obviously, the non-constant of this technology convenience, cannot be applied to portable terminal device.In addition, Chinese patent application discloses No. CN1972186A and discloses a kind of portable identity authorization system and authentication method thereof, in the art, use mobile device camera function, auxiliary flasher light obtains palmmprint and carries out palmprint authentication, and it brings certain convenience, but the quality that the program obtains palmprint image is lower, therefore require very high to built-in palmprint match algorithm, the program still has no small distance from actual commercialization on the whole.
For the shortcoming of these technology current, the present invention proposes a kind of solution of contactless palmprint authentication, inherently to improve the technical foundation of contactless palmprint authentication, for the breakthrough of contactless palmprint authentication technology on convenience provides technical guarantee.So-called contactless palmprint authentication refers to, authentic palm is without the need to being fixed on certain positioning element.
In one preferably embodiment, the invention provides a kind of contactless palmprint authentication device realized based on computer program, this application of installation is on portable terminal device (below only for smart mobile phone).As shown in Figure 2, this smart mobile phone generally includes CPU, internal memory, camera 12, nonvolatile memory, illuminating lamp 11 and comprises the various input and output hardware etc. of touch display screen.
In preferred mode, camera 12 is usually located at smart mobile phone the same side, the back side of such as mobile phone with the illuminating lamp 11 be such as made up of LED.Consider the distortion of structure and appearance design, in the invention process process, can also relax further the position relationship of camera 12 and illuminating lamp 11, as long as the illumination output area of camera 12 path domain and illuminating lamp 11 that gather image exists common factor.In fact, as long as the smart mobile phone of energy flash photographing, all possess and implement underlying hardware environment of the present invention.As shown in Figure 1, thicker dotted line represents the illumination output area of illuminating lamp 11, and represents that camera 12 gathers the path domain of image compared with fine dotted line.
In realization, this device can as one independently mobile phone application (APP) be arranged on mobile phone, also can as a characteristic functions be integrated in other mobile phones application in.
Please refer to Fig. 2, in a kind of Software Implementation (not getting rid of other embodiments), this device, as the virtual bench of a logic level, mainly comprises and gathers control module, screening output unit and palmprint match unit.
Please refer to Fig. 3, use and the operational process of this device comprise the following steps.
Step 101, gathers control module and opens palmprint authentication flow process according to specific instruction;
Step 102, gathers control module enable camera when palmprint authentication flow startup, and at least keeps illuminating lamp to be set to light illumination mode when outside illumination is not enough;
Step 103, screening output unit obtains a frame new images alternatively image from the video flowing of the current output of camera;
Step 104, screening output unit is for the current state parameter set of this candidate image corresponding acquisition camera, and judge whether each state parameter in this set meets the preset standard corresponding with this parameter, if all met, the contrast palmprint image of candidate image as palmprint match is exported, if all dissatisfied, then ignore this candidate image, and return step 103;
Step 105, whether palmprint match unit judges contrast palmprint image mates with benchmark palmprint image, if mated, authenticated identity is legal.
The Authentication mechanism that palmprint authentication can be applied as various mobile phone, user is to perform specific operation, and as access significant data, it needs to verify its identity by palmprint authentication.For realizing palmprint authentication, usually need the one or more user's palmprint image of first typing as benchmark palmprint image.This benchmark palmprint image is the basis of palmprint authentication, by subsequent acquisition to contrast palmprint image mate with this benchmark palmprint image, the match is successful then certification pass through.
The typing of benchmark palmprint image can adopt various ways.A kind of mode is that user uploads a two field picture as benchmark palmprint image, and the palmprint image such as using other camera installations to take is as benchmark palmprint image.In a kind of possible implementation, also can use and contrast the similar method of palmprint image with above-mentioned collection, be kept at smart mobile phone inside by smart mobile phone collection benchmark palmprint image.
That is, a benchmark typing flow process can be provided with in mobile phone A PP, gather for user and preserve benchmark palmprint image.In this fashion, gather control module camera described in respective enable when benchmark typing flow process is opened, and maintenance illuminating lamp duty is set to light illumination mode for camera and provides light filling to export when outside illumination is not enough; Screening output unit screens image like that according to step 103 and step 104, and unlike in benchmark typing flow process, the contrast palmprint image of output can save as benchmark palmprint image by it.
Also can add these existing realizations in the process that the present invention realizes in commercialization, but typing benchmark palmprint image and judging contrasts the process whether palmprint image mates with benchmark palmprint image, can be realized with reference to prior art.The present invention does not pay close attention to the quality of matching algorithm itself, and target of the present invention mainly by improving the contrast collection of palmprint image and the flow process of palmprint authentication, reduces development difficulty and the cost of development of palmprint authentication class software product.
After the user's palmmprint typing as benchmark palmprint image completes, user may trigger the unlatching of palmprint authentication flow process by specific interactive interface.Such as, user may click specific touch button to trigger the unlatching of palmprint authentication flow process on screen; The unlatching of certain triggering palmprint authentication flow process also may be that application-specific triggers, and when such as certain mobile phone is applied in and finds that some condition meets, it may trigger palmprint authentication flow process and open.
In the present invention, after palmprint authentication flow process is opened, gathering control module can be enable and under illuminating lamp is arranged on light illumination mode by camera.On smart mobile phone, after camera is opened, it can automatically constantly be gathered image by built-in sensor (Sensor) chip and be exported the video flowing of certain frame per second, such as the video flowing of 30 frames/second.This video flowing can be illustrated on mobile phone screen usually, allows user's direct feel to the direction that camera is aimed at or target.
Mate with benchmark palmprint image to obtain a frame contrast palmprint image, direct thinking is that the photograph application of reference smart mobile phone is realized.In photograph application, when user clicks photograph application icon on mobile phone screen, camera can be opened and according to user operation, the current two field picture collected exported and preserved.If when certain other application a needs to obtain a two field picture, common way is also the functional realiey of simulate photographic application.
When exterior light is according to time not enough, the application of photograph class can utilize flashlamp to carry out light filling automatically.Perhaps, this mode can meet user and require in other application scenarioss needing to obtain a two field picture, but but has problems in palmprint authentication process.First, time user uses smart mobile phone to aim at palm, its distance is usually closer, generally in the scope of several tens cm.If select automatic flash pattern, when many times especially exterior light is according to slight deficiency, easily cause image overexposure.If but select to manually boot flash of light, then not only convenience is poor, and requires higher to user.Secondly, because flash of light completes in a flash, if the palm of user is moving while flash of light, palm is moving and can cause motion blur, finally causes the second-rate of this two field picture of current shooting.Relative distance between user's palm and mobile phone may change at any time, the continuous change of this distance has directly for focusing state and exposure status and affects significantly, the movement of user's palm can not control, and the fluorescent lifetime of flashlamp completes instantaneously, therefore Flash Mode is used, and there is the contradiction being difficult to overcome between the use-pattern of mobile terminal, cause it usually cannot obtain the palmprint image of the quality requirements meeting palmprint authentication.
Therefore, when carrying out palmprint authentication, if follow the general technology realization approach in this area and adopt traditional photograph application mode to gather contrast palmprint image, being substantially difficult to collect picture quality and contrasting palmprint image preferably.In this case, need developer to develop more powerful algorithm to make up the deficiency of contrast palmprint image quality, but so, cost of development and difficulty can raise undoubtedly, whole structure but may be still very poor.
In addition, from application reality, user may carry out palmprint authentication in various occasion, and obtain contrast palmprint image in a flashing mode and can cause light pollution undoubtedly, have influence on the crowd of surrounding, such Realization of Product is not easy to use in public.
In fact, the thinking of flash mode is mainly still subject to the impact of traditional photography technical thought, wishes that output high-power illumination is to make up the deficiency of illumination.Further, due to the uncertainty of target range in major part photograph application, light illumination mode is unfavorable for traditional photography demand.Such as, when the target that is taken is distant time, light illumination mode is usually meaningless.But specific to palmprint authentication application, due to palmmprint, distance camera is comparatively near usually, light filling when completely can adopt light illumination mode to make a video recording.
In other words, the present invention is directed to the reality of palmprint authentication, distance camera is nearer usually to consider palmmprint, light illumination mode is adopted to carry out light filling, although its light filling strength ratio flash mode is much smaller, but due to illuminating lamp and palm close together, not only can realize good light filling effect, and substantially can guarantee can not cause overexposure because of the unlatching of illuminating lamp.
Especially it should be noted that, position due to external light source is uncertain, the present invention carries out shooting light filling by utilizing the light illumination mode of mobile phone, effectively can improve during exterior light is shone the negative effect that there is backlight, frontlighting and the illumination from different angles and produce, namely eliminate the negative effect that brings of surround lighting, thus can ensure that image output quality interval becomes and more restrain.Such as, compared with taking pictures with under light illumination mode, when unlatching flash function is taken pictures, if other are consistent, the constant interval of the picture quality that smart mobile phone camera exports is larger, and that is picture quality exports stable not.
And the output power of illuminating lamp is very high under flash mode, cannot continue to provide illumination, if continue to provide illumination, will be easy to cause illuminating lamp to burn.
Adopting light illumination mode to improve on the basis of contrast palmprint image quality, the present invention also screens the multiple image that camera exports continuously.After camera is enable, under operating system may be given tacit consent to camera is arranged on continuous autofocus mode.Consider that operating system may not be that camera is set to continuous autofocus mode by acquiescence, the present invention optimizes further to the process gathering contrast palmprint image.Such as in iOS operating system, operating system allows application controls camera to be operated in autofocus mode, continuously autofocus mode and manual focus pattern under arbitrary pattern.Being expressed as follows of this Three models in iOS6.0 operating system:
AVCaptureFocusModeLocked=0, // locking focal length, does not namely focus
AVCaptureFocusModeAutoFocus=1, // once focus, then lock focal length
AVCaptureFocusModeContinuousAutoFocus=2, // auto-focusing continuously
Similarly, for exposing and adjusting, iOS also has Three models to select for user: fixing exposure mode, an auto exposure mode and continuous auto exposure mode.Being expressed as follows of this Three models in iOS6.0 operating system:
AVCaptureExposureModeLocked=0, // click stop, does not namely carry out exposure adjustment
AVCaptureExposureModeAutoExpose=1, // carry out single exposure adjustment, then click stop
AVCaptureExposureModeContinuousAutoExposure=2, // automatic exposure adjustment continuously
Export to continue to obtain the higher image of quality, gather control module when enable camera, further by the Interface Controller camera that operating system provides, under being operated in continuous autofocus mode and continuous auto exposure mode to make camera.In like manner can know by inference, if relate to white balance state parameter in implementation process, gathering control module needs to do similar setting to blank level adjustment pattern.
The principle of screening is that in the current state parameter set of camera, whether each state parameter meets preset standard corresponding to this parameter, if all meet preset standard, this two field picture current is acceptable contrast palmprint image.State parameter set at least comprises a kind of state parameter.In a kind of possible embodiment, acquisition state set can comprise in focusing state parameter, exposure status parameter and white balance state parameter any one or multiple.Certainly, if operating system can provide more multimode parameter, then can need to be selected according to application.
In a kind of possible embodiment, when screening output unit obtains a two field picture from camera, it needs to make a choice according to the current focusing state parameter of camera and exposure status parameter.Usually, focusing state parameter can characterize respectively focusing complete and focus carry out in this two states, exposure status parameter also can characterize exposure parameter adjustment in and exposure adjustment this two states complete.Certainly, along with the development of technology, the focusing state parameter recorded in operating system and exposure status parameter may have more state, and even likely blend into one multiple state parameter expression.In actual implementation process of the present invention, those skilled in the art can make accommodation according to these changes.
Implement in process of the present invention in reality, the focusing state parameter met the demands and exposure status parameter can be saved as acceptable preset standard.In addition, the preset standard of parameters may be different because operating system is different.Once screening output unit finds that these two state parameters meet corresponding preset standard respectively, then can determine that this two field picture current is acceptable contrast palmprint image.Such as, in embodiments of the present invention, suppose that focusing state parameter represents that focusing completes when being 1, in representing when being 0 that focusing is carried out; Exposure status is that 1 expression exposure adjustment completes, and to be 0 be represents that exposure adjustment is carried out.So, when the state parameter set that screening output unit gets is 11, just determines that candidate image is acceptable contrast palmprint image, and when state parameter set is 00,01 or 10, then can ignore candidate image.
To be embodied as example under iOS6.0 operating system, whether meet preset standard for focusing state parameter, the corresponding interface provided by system is to judge whether camera is carrying out focusing adjustment.Specifically, can judge based on by calling the rreturn value obtained with lower interface, property (nonatomic, readonly, getter=isAdjustingFocus) BOOL adjustingFocus.If return YES to represent current and focusing in adjustment state; Return NO to represent current and do not focusing, now can be understood as focusing completion status.
Whether preset standard is met for exposure status parameter, by judging whether camera is carrying out exposure adjustment to judge whether camera is carrying out exposure adjustment.Specifically, can judge based on by calling the rreturn value obtained with lower interface, property (nonatomic, readonly, getter=isAdjustingExposure) BOOL adjustingExposure.If return YES represent current carrying out exposure adjustment in; Return NO represent current not carrying out exposure adjustment, that is characterize exposure adjustment complete.
Be acquired afterwards at a frame contrast palmprint image, contrast palmprint image can be output to the palmprint match unit of device inside.Palmprint match unit can use such as preset matching algorithm to be mated with the benchmark palmprint image of typing in advance by this contrast palmprint image.If the match is successful, pass through authenticating user identification.If mate unsuccessful, then illustrate that current contrast palmprint image may not be the palm from validated user, or the quality of likely current contrast palmprint image does not still meet the requirement of matching algorithm, now unsuccessfully can point out to user's authentication output.Please refer to Fig. 4, in a kind of possible implementation, when mating unsuccessful, again obtaining candidate image if return, then can improve the reliability of authentication result.
Consider that validated user likely gathers image under any photoenvironment, if there are some photoenvironments extremely severe, then this screens the requirement that the contrast palmprint image obtained likely still does not meet matching algorithm, a kind of mode is that authentification failure is just unsuccessfully pointed out to user's authentication output at once, and another kind of mode is attempted repeatedly screening and exports the reliability that contrast palmprint image can improve identity authentication result.Furthermore, in order to improve user's experience further, avoid repeated screening unsuccessful circulation so repeatedly, gathering control module can after palmprint authentication flow startup, start the timer that has scheduled duration, the such as timer of 10 seconds, and at timer expiry but palmprint match is still unsuccessful time terminate palmprint authentication flow process, unsuccessfully point out to user's authentication output simultaneously.
Consider the universal of networked instruments, contrast palmprint image not only can export to local palmprint match unit, also can be outputted on far-end server by network.Far-end server can have palmprint match unit equally, and it can adopt default contrast algorithm to be contrasted by the benchmark palmprint image of typing in advance on contrast palmprint image and server equally.In this case, palmprint authentication flow process can be controlled by far-end server.
As can be seen from above description, the mode of acquisition frame image of the present invention and the mode of traditional acquisition frame image are diverse, the present invention is directed to candidate image and check current camera state, camera state meets preset standard, just by candidate image as a comparison palmprint image obtains, otherwise neglect candidate image then collection next frame image.
In general, the present invention is on whole basis of improving each frame image quality of video flowing, picture quality preferably image is screened again inside video flowing, the mode that this and traditional photography application obtain image is completely different, photographic means is only the image obtaining a certain moment according to user or software instruction, and the state parameter not in conjunction with current such as focusing state, the exposure status etc. of camera self screens image.
In above implementation, whole process is without the need to user intervention, and the present invention claims this mode to be autoscan mode.As previously mentioned, under smart mobile phone may all be given tacit consent to or collected control module is arranged on continuous autofocus mode, therefore camera open after its will auto-focusing.On this basis, in order to provide different experience to user, the present invention, in the embodiment that another kind is possible, provides one manually to click implementation.This mode allows user to determine when to start to screen image by clicking.
Manually clicking in embodiment, described device also comprises the enable unit of screening.The enable unit of this screening is further used for after palmprint authentication flow startup, first waits for the screening contrast instruction of user, and after receiving the screening contrast instruction that user issues enable screening output unit.Meeting auto-focusing after camera unlatching, but now screening output unit does not screen any image, until user sends screening contrast instruction by point touching display screen, screens the Screening Treatment that output unit just starts to contrast in step 103 execution palmprint image.
Like this, because user can by the image sharpness on visual inspection screen, just clicking screen when treating that picture clearly and trigger and contrast palmprint image Screening Treatment, will significantly shorten from screening the time that certification passes through.It should be noted that in this embodiment, screening output unit is still just can obtain contrast palmprint image by certain screening operation, and the process of only this screening may shorten greatly.
No matter be autoscan mode or manually click mode, it does not all require the movement of the authentic palm of user, in the distance regions guiding user to be placed on by palm to be applicable to obtaining high-quality picture without any guiding measure in other words.In order to accelerate palmprint authentication speed, the present invention, in a kind of possible embodiment, provides a kind of guiding measure to place palm to guide user.
Place in the embodiment of palm guiding user, gather control module and when enable camera, also the focusing parameter (normally focal length) of camera and exposure parameter (as aperture) can be set to respectively the fixed value preset.Certainly along with the change of main flow camera hardware capabilities, this fixed value may constantly change.In addition, the mobile phone of different style, corresponding fixed value may be not quite similar.In the present embodiment, enter between a collection distance regions corresponding with fixed value set if user does not move palm, so screening output unit and cannot screen the contrast palmprint image meeting preset standard, because focal length has been a fixed value, just looks like that a cameras with fixed focus is the same.This that is, at step 104, user's palm does not enter preferably collection distance and the focusing of candidate's palmprint image may be caused unintelligible or under-exposed, and now screening output unit can not meet preset standard because of the camera state parameter got based on candidate's palmprint image and ignore this image.Therefore, palm or smart mobile phone is moved as early as possible to change the distance between palm and camera in order to allow user, focusing state parameter in described state parameter set with in exposure status parameter arbitrary meet corresponding preset standard time, gather control module and can export the wrong information of distance to user further.Can being realized by a lot of mode of this information may be word, also may be image or sound; Change even by screen background color realizes.Such as, when user's palm is not interior in better collection distance regions, screen background presents redness different with normal default color, if user's palm is in better collection distance regions, due to without the need to exporting distance miscue information, screen background reverts to normal default color.
In a kind of possible implementation, gather control module can certification by after camera and illuminating lamp are gone enable.For the situation of authentification failure, the process gathering control module can be more flexible.Such as, both can camera and illuminating lamp be gone enable; Also can only illuminating lamp be gone enable; Can not also to process and to keep both camera and illuminating lamp to continue enable, and wait for that user triggers new palmprint authentication flow process or user again exit instruction, if user exits, need camera and illuminating lamp to go enable.
In a kind of possible implementation, under illuminating lamp fixedly can remain on light illumination mode.Like this, when outside illumination deficiency, illuminating lamp keeps light filling to export, and significantly can promote picture quality; And still keep light filling to export when outside illumination is good, also can improve picture quality to a certain extent, such as improve the impact of frontlighting and backlight.This embodiment is effective for improving picture quality, but its energy-saving effect is slightly poor.
In the embodiment that another kind is possible, collection control module first can read the photosensitive sensor acquisition current light parameter that smart mobile phone carries, and controls illuminating lamp carry out light filling output according to this illumination parameter under the level of illumination of correspondence.This embodiment can realize more low intensive light filling and export in the good situation of illumination, even can not open illuminating lamp.When outside illumination is very poor, the light filling output that illuminating lamp realizes higher-strength can be controlled.
That is, in this embodiment, gather the control of control module to illuminating lamp and be divided into multiple situation, correspond to different light levels respectively.Such as under the first light levels, gather the not enable illuminating lamp of control module; When outside light levels drops to the second light levels, gather control module and illumination etc. is arranged on light illumination mode, and the light filling output intensity of illuminating lamp is set to the first light filling intensity; Under the 3rd light levels, gather control module and illuminating lamp is arranged on light illumination mode, and the light filling output level of illuminating lamp is set to higher second light filling intensity.
Above two kinds of embodiments can improve the picture quality in the not enough situation of illumination, and when illumination is good, a kind of embodiment is partial to the consideration of picture quality, and another kind is then partial to energy-conservation.
As can be seen from the description of the preceding paragraph, the maintenance illuminating lamp when outside illumination is not enough alleged by the present invention is set to light illumination mode, is not refer in particular to a kind of trigger relation.That is, in the present invention, it is enable that exterior light may trigger the collected control module of illuminating lamp according to deficiency, and carry out corresponding light filling output.But in possible embodiment, be just operated in light illumination mode time illuminating lamp is enable from camera and, and with exterior light according to whether deficiency is not contacted directly.Therefore, keep illuminating lamp to be set to the expression that light illumination mode is a kind of state relation when outside illumination condition is not enough, but not the expression of trigger relation.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (21)
1. a contactless palmprint authentication device, be applied to comprise camera and illuminating lamp portable terminal device on, it is characterized in that, this device comprises:
Gather control module, for described camera enable when palmprint authentication flow process is opened, and keep the duty of described illuminating lamp to be set to light illumination mode when outside illumination deficiency, thus provide light filling to export for described camera;
Screening output unit, a frame new images alternatively image is selected in the video flowing that exports from described camera, the current state parameter set of described camera is obtained for this candidate image, judge whether each state parameter in this set meets the preset standard corresponding with this parameter, if all met, the contrast palmprint image of candidate image as palmprint match is exported, if any one state parameter in this set does not meet corresponding preset standard, then ignore this candidate image, and reselect a frame new images alternatively image; And
Palmprint match unit, for being mated with one or more benchmark palmprint images of typing in advance by described contrast palmprint image according to preset algorithm, if the match is successful, then determines that certification is passed through; If it fails to match, unsuccessfully point out to user's authentication output or return screening output unit.
2. device as claimed in claim 1, is characterized in that: described state parameter comprises focusing state parameter and exposure status parameter, wherein,
Described focusing state parameter comprises during focusing completes and focus and carry out;
Described exposure status parameter comprises in exposure adjustment and exposure adjustment completes;
Described preset standard is respectively, and described focusing state parameter characterization has been focused, and described exposure status parameter characterization exposure adjustment completes.
3. device as claimed in claim 1, is characterized in that: described collection control module is configured to:
The focusing parameter of camera and exposure parameter are set to fixed value; And
Focusing state parameter in described state parameter set with in exposure status parameter arbitrary meet corresponding preset standard time, export apart from miscue information to user.
4. device as claimed in claim 1, is characterized in that: described collection control module is also configured to, certification by after described camera and described illuminating lamp are gone enable.
5. device as claimed in claim 1, it is characterized in that, described collection control module is also configured to, the timer with preset duration is started when described palmprint authentication flow startup, and terminate described palmprint authentication flow process when described timer expiry, and unsuccessfully point out to user's authentication output.
6. device as claimed in claim 1, is characterized in that: also comprise the enable unit of screening,
The enable unit of described screening is configured to, after described palmprint authentication flow startup, when receiving the screening contrast instruction that user issues, and enable described screening output unit.
7. device as claimed in claim 1, is characterized in that:
Described collection control module is also configured to, the enable described camera when benchmark typing flow process is opened, and keeps the duty of described illuminating lamp to be set to light illumination mode when outside illumination is not enough, thus provides light filling to export for described camera;
Described screening output unit is also configured to, and when described benchmark typing flow process is opened, the contrast palmprint image exported by described camera is preserved in advance as benchmark palmprint image.
8. device as claimed in claim 1, is characterized in that: described collection control module is also configured to, and when outside illumination is sufficient, the duty of described illuminating lamp is set to light illumination mode, thus provides light filling to export for described camera.
9. device as claimed in claim 1, is characterized in that:
Described collection control module is also configured to, and according to the outside illumination parameter determination light levels that the photosensitive sensor of described portable terminal device provides, and determines the light filling output intensity of described illuminating lamp according to described light levels.
10. device as claimed in claim 1, is characterized in that: described collection control module is also configured to, and when enable described camera, described camera is set to continuous autofocus mode and continuous auto exposure mode.
11. 1 kinds of contactless palmprint authentication methods, be applied to comprise camera and illuminating lamp portable terminal device on, it is characterized in that, the method comprises the following steps:
Steps A, the enable described camera when palmprint authentication flow process is opened, and keep the duty of described illuminating lamp to be set to light illumination mode when outside illumination is not enough, thus provide light filling to export for described camera;
Step B, selects a frame new images alternatively image from the video flowing that described camera exports;
Step C, the current state parameter set of described camera is obtained for this candidate image, judge whether each state parameter in this set meets the preset standard corresponding with this parameter, if all met, the contrast palmprint image of this candidate image as palmprint match is exported, if any one state parameter in this set does not meet corresponding preset standard, then ignore this candidate image and return step B; And
Step D, mates described contrast palmprint image with the benchmark palmprint image of typing in advance according to preset algorithm, if the match is successful, then determines that certification is passed through; If it fails to match, unsuccessfully point out to user's authentication output or return step B.
12. methods as claimed in claim 11, is characterized in that: described state parameter comprises focusing state parameter and exposure status parameter,
Described focusing state parameter comprises during focusing completes and focus and carry out;
Described exposure status parameter comprises in exposure adjustment and exposure adjustment completes;
Described preset standard is respectively: described focusing state parameter characterization has been focused, and described exposure status parameter characterization exposure adjustment completes.
13. methods as claimed in claim 11, is characterized in that:
Comprise taking a step forward of described steps A: the focusing parameter of camera and exposure parameter are set to fixed value; And
Described step C specifically comprises: the focusing state parameter in described state parameter set with in exposure status parameter arbitrary meet corresponding preset standard time, export apart from miscue information to user.
14. methods as claimed in claim 11, is characterized in that, also comprise:
Step e, certification by after described camera and described illuminating lamp are gone enable.
15. methods as claimed in claim 11, is characterized in that, also comprise:
Step F 1, when palmprint authentication flow startup, starts the timer with preset duration; And
Step F 2, terminates described palmprint authentication flow process, and unsuccessfully points out to user's authentication output when described timer expiry.
16. methods as claimed in claim 11, is characterized in that, also comprise:
Step G1, after described palmprint authentication flow startup, waits for the screening contrast instruction of user; And
Step G2, after receiving the described screening contrast instruction that user issues, performs step B.
17. methods as claimed in claim 11, is characterized in that, also comprised before steps A:
The enable described camera when benchmark typing flow process is opened, and keep the duty of described illuminating lamp to be set to light illumination mode when outside illumination is not enough, thus provide light filling to export for described camera;
Described step B comprises further:
When benchmark typing flow process is opened, the contrast palmprint image exported is preserved as benchmark palmprint image.
18. methods as claimed in claim 11, is characterized in that: described steps A comprises further:
When outside illumination is sufficient, the duty of described illuminating lamp is set to light illumination mode, thus provides light filling to export for described camera.
19. methods as claimed in claim 11, is characterized in that: described steps A comprises further:
According to the outside illumination parameter determination current light grade that the photosensitive sensor of described portable terminal device provides, and determine the light filling output intensity of described illuminating lamp according to light levels.
20. methods as claimed in claim 11, is characterized in that: described steps A comprises further:
When enable described camera, described camera is set to continuous autofocus mode and continuous auto exposure mode.
21. 1 kinds of portable terminal devices, comprise camera and illuminating lamp, it is characterized in that, also comprise contactless palmprint authentication device according to any one of claim 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310439509.1A CN104463083B (en) | 2013-09-24 | 2013-09-24 | Contactless palmprint authentication method, device and portable terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310439509.1A CN104463083B (en) | 2013-09-24 | 2013-09-24 | Contactless palmprint authentication method, device and portable terminal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104463083A true CN104463083A (en) | 2015-03-25 |
| CN104463083B CN104463083B (en) | 2016-08-17 |
Family
ID=52909100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310439509.1A Active CN104463083B (en) | 2013-09-24 | 2013-09-24 | Contactless palmprint authentication method, device and portable terminal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104463083B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106709457A (en) * | 2016-12-27 | 2017-05-24 | 维沃移动通信有限公司 | Task execution method based on fingerprint, and mobile terminal |
| CN107153818A (en) * | 2017-05-03 | 2017-09-12 | 广东欧珀移动通信有限公司 | Optical finger print verification method and Related product |
| CN107944356A (en) * | 2017-11-13 | 2018-04-20 | 湖南商学院 | The identity identifying method of the hierarchical subject model palmprint image identification of comprehensive polymorphic type feature |
| CN108694385A (en) * | 2018-05-14 | 2018-10-23 | 深圳市科发智能技术有限公司 | A kind of high speed face identification method, system and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101449288A (en) * | 2006-05-23 | 2009-06-03 | 光荣株式会社 | A face authentication device, a face authentication method and face authentication programs |
| CN101770573A (en) * | 2010-01-14 | 2010-07-07 | 沈洪泉 | Automatic focusing iris image imaging device for iris recognition and control method thereof |
| CN202266112U (en) * | 2011-09-19 | 2012-06-06 | 汉王科技股份有限公司 | Safe with face and palm print identification function |
| CN102855476A (en) * | 2011-06-27 | 2013-01-02 | 王晓鹏 | Self-adaptive binocular iris synchronous collection system of single image sensor |
| CN102982308A (en) * | 2012-08-03 | 2013-03-20 | 成都众合云盛科技有限公司 | Palm print collecting and positioning method in long distance on-line authentication research |
-
2013
- 2013-09-24 CN CN201310439509.1A patent/CN104463083B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101449288A (en) * | 2006-05-23 | 2009-06-03 | 光荣株式会社 | A face authentication device, a face authentication method and face authentication programs |
| CN101770573A (en) * | 2010-01-14 | 2010-07-07 | 沈洪泉 | Automatic focusing iris image imaging device for iris recognition and control method thereof |
| CN102855476A (en) * | 2011-06-27 | 2013-01-02 | 王晓鹏 | Self-adaptive binocular iris synchronous collection system of single image sensor |
| CN202266112U (en) * | 2011-09-19 | 2012-06-06 | 汉王科技股份有限公司 | Safe with face and palm print identification function |
| CN102982308A (en) * | 2012-08-03 | 2013-03-20 | 成都众合云盛科技有限公司 | Palm print collecting and positioning method in long distance on-line authentication research |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106709457A (en) * | 2016-12-27 | 2017-05-24 | 维沃移动通信有限公司 | Task execution method based on fingerprint, and mobile terminal |
| CN107153818A (en) * | 2017-05-03 | 2017-09-12 | 广东欧珀移动通信有限公司 | Optical finger print verification method and Related product |
| US10713467B2 (en) | 2017-05-03 | 2020-07-14 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Optical fingerprint verification method and mobile terminal |
| CN107944356A (en) * | 2017-11-13 | 2018-04-20 | 湖南商学院 | The identity identifying method of the hierarchical subject model palmprint image identification of comprehensive polymorphic type feature |
| CN107944356B (en) * | 2017-11-13 | 2019-02-19 | 湖南商学院 | The identity identifying method of the hierarchical subject model palmprint image identification of comprehensive polymorphic type feature |
| CN108694385A (en) * | 2018-05-14 | 2018-10-23 | 深圳市科发智能技术有限公司 | A kind of high speed face identification method, system and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104463083B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107992794B (en) | A kind of biopsy method, device and storage medium | |
| CN106557678B (en) | A kind of intelligent terminal mode switching method and its device | |
| AU2013401820B2 (en) | Non-contact palmprint authentication method and device and portable terminal | |
| Li et al. | Face recognition under spoofing attacks: countermeasures and research directions | |
| JP7159509B1 (en) | Systems and methods using multiple focal stacks for image-based spoofing detection | |
| CN103106401B (en) | Mobile terminal iris recognition device with human-computer interaction mechanism | |
| US10423772B2 (en) | Electronic devices with improved iris recognition and methods thereof | |
| JP2018526702A (en) | Fingerprint collection control method, apparatus and electronic apparatus based on display screen | |
| AU2016201723A1 (en) | Method of Host-Directed Illumination and System for Conducting Host-Directed Illumination | |
| US20100215223A1 (en) | Vein Pattern Management System, Vein Pattern Registration Apparatus, Vein Pattern Authentication Apparatus, Vein Pattern Registration Method, Vein Pattern Authentication Method, Program, and Vein Data Configuration | |
| CN1328309A (en) | Apparatus, system card and method for identify evaluation based on biological testing | |
| JP2007081876A (en) | Portable communication terminal unit, authentication method, and authentication program | |
| CN107948539A (en) | A kind of flash lamp control method and terminal | |
| CN104463083A (en) | Non-contact palm print authentication method and device and portable terminal | |
| CN103679113A (en) | Positioning and focusing method and system of OTP (One Time Password) device in two-dimensional bar code scanning | |
| CN109979042A (en) | A kind of method, apparatus and system of dual unlock | |
| CN109639991A (en) | A kind of photographic method, device, terminal and storage medium | |
| CN110013217A (en) | Detection consumes illegal drugs method, apparatus, terminal device and the medium of personnel | |
| WO2019007179A1 (en) | Control method for infrared light source assembly and electronic device | |
| CN109496312A (en) | Biological feather recognition method, device and electronic equipment | |
| CN108668022A (en) | A kind of face unlocking method under dark-state and its mobile terminal | |
| TWI528211B (en) | Non-contact palmprint authentication method, device and portable terminal | |
| CN107463885A (en) | Bio-identification mode control method and Related product | |
| US20190057271A1 (en) | Image processing method, photographing device and storage medium | |
| CN108235817A (en) | Flash lamp reminding method and terminal device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160929 Address after: 214072, A3 building, No. 777, West building, Binhu District, Binhu District, Jiangsu, Wuxi Province 7 Patentee after: Master technology Wuxi Co., Ltd. Address before: 100085, 303, building 7, building 18, Anning East Road, Qinghe, Beijing, Haidian District Patentee before: BEIJING ZHBOON INFORMATION TECHNOLOGY CO., LTD. |