WO2018072099A1

WO2018072099A1 - Palm detection method and device

Info

Publication number: WO2018072099A1
Application number: PCT/CN2016/102443
Authority: WO
Inventors: 李治农; 仲崇亮; 刘宝璐; 王辉能
Original assignee: 厦门中控智慧信息技术有限公司
Priority date: 2016-10-18
Filing date: 2016-10-18
Publication date: 2018-04-26
Also published as: CN106663201A

Abstract

Disclosed in the embodiments of the present invention are a palm detection method and device, used for accurately and highly effectively determining a living-body palm. The embodiments of the present invention are used for a palm detection device, and said method comprises: in a first light-source operating mode, acquiring a first image of a to-be-detected palm by means of an image acquisition apparatus; in a second light-source operating mode, acquiring a second image of a to-be-detected palm by means of the image acquisition apparatus; according to the first image and the second image, determining whether the to-be-detected palm is a living-body palm; the light source used in the first light-source operating mode and the light source used in the second light-source operating mode comprising different light wave bands. Thus by means of alternately using light-source operating modes comprising different light wave bands, the palm detection device acquires different images of the to-be-detected palm by means of the image acquisition apparatus and analyzes the different images; it is thus possible to determine whether the to-be-detected palm is a living-body palm, thereby simply and highly effectively reaching a determination of a living-body palm.

Description

Palm detection method and device

Technical field

The invention relates to the field of biometric anti-counterfeiting, and in particular to a palm detecting method and device.

Background technique

Since the palm has biometric information, such as palm vein information and palmprint information, the biometric information on the palm can be used to identify the user.

The biometrics on the palm can be forged, for example, using an image including palm vein and palmprint information to be forged as a living palm. At this time, the palm recognition device may recognize that the image is not a living palm, and thus the palm recognition is recognized. This creates a security risk.

In the prior art, before the palm information is recognized, the method of judging whether it is a living palm is generally obtained according to a pre-established living palm statistical rule, and whether the acquired palm image is obtained according to the living palm. However, this often results in efficiency due to the complex effects of the algorithm, and the accuracy is not high.

Summary of the invention

Embodiments of the present invention provide a palm detecting method and apparatus for accurately and efficiently determining a living body palm.

In order to solve the above technical problem, the embodiment of the present invention provides the following technical solutions:

A palm detecting method, the method being applied to a palm detecting device, the method comprising:

In the first light source working mode, acquiring a first image of the palm to be detected by the image capturing device;

Acquiring, by the image acquisition device, the second image of the palm to be detected;

Determining, according to the first image and the second image, whether the palm to be detected is a living palm;

Wherein, the light source used by the first light source working mode and the light source used by the second light source working mode comprise different optical bands.

In order to solve the above technical problem, the embodiment of the present invention further provides the following technical solutions:

A palm detecting device, the palm detecting device comprising an image capturing device, the palm detecting Equipment includes:

An image acquisition unit, configured to acquire, by the image acquisition device, the first image of the palm to be detected when the first light source operates in a mode;

The image acquisition unit is further configured to acquire, by the image acquisition device, the second image of the palm to be detected when the second light source operates in a mode;

a determining unit, configured to determine, according to the first image and the second image, whether the palm to be detected is a living palm;

Wherein the light source used by the first light source working mode and the light source used by the second light source working mode comprise different optical bands,

The living palms are respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device acquires different palm feature information of the living body palm through the image collecting device, and the non-living palms are respectively at the first When the light source of the light source working mode and the light source of the second light source operating mode are illuminated, the palm detecting device acquires the same palm feature information of the non-living palm through the image capturing device.

In the technical solution provided by the embodiment of the present invention, the first image of the palm to be detected is acquired by the image capturing device in the working mode of the first light source on the palm detecting device; and the image capturing device is obtained by the image capturing device in the working mode of the second light source A second image of the palm to be detected; and then, based on the first image and the second image, determining whether the palm to be detected is a living palm. The light source used in the first light source working mode and the light source used in the second light source working mode include different light bands, and the light source of the living body palm is respectively irradiated in the working mode of the first light source and the light source in the working mode of the second light source due to different wave sections. Next, the palm detecting device acquires different image information of the living palm. In this way, by alternately using the light source working modes including different wave segments, the palm detecting device respectively acquires different images of the palm to be detected through the image capturing device, and analyzes the different images to obtain whether the palm to be detected is a living palm, thereby The discrimination of the living palm is realized easily and efficiently.

DRAWINGS

1 is a schematic diagram of a usage scenario involved in a palm detecting method according to an embodiment of the present invention;

2 is a schematic diagram of another angle of the schematic diagram of the usage scenario shown in FIG. 1;

3 is a schematic diagram of a palm print image acquired by a palm detecting device in the usage scene shown in FIG. 1 by an image capturing device;

4 is a schematic diagram of a palm vein image acquired by an image detecting device by a palm detecting device in the use scenario shown in FIG. 1;

5 is a schematic diagram of palm prints and palm vein images acquired by the palm detecting device in the use scene shown in FIG. 1 by the image capturing device;

6 is a schematic diagram showing a spectral characteristic curve of a filter of a palm detecting device in the use scenario shown in FIG. 1;

FIG. 7 is a flowchart of a method for detecting a palm according to another embodiment of the present invention;

FIG. 8 is a flowchart of a method for detecting a palm according to another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a palm detecting device according to another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The terms "first", "second", "third", "fourth", etc. (if present) in the specification and claims of the present invention and the above figures are used to distinguish similar objects without having to use To describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

FIG. 1 and FIG. 2 are schematic diagrams of usage scenarios involved in a palm detecting method according to an embodiment of the present invention. 1 is a side view, and FIG. 2 is a plan view of the use scene shown in FIG. 1. Referring to Figures 1 and 2, the usage scenario includes a palm detecting device 101 and a palm 102. The palm detecting device can detect whether the palm is a living palm. In some embodiments, the palm detecting device can further include other functions, such as palm hand feature information recognition. The palm feature information includes palm print information and palm vein information.

The existing palm recognition device simply recognizes the palm feature information, but the palm feature information may be forged by the unlawful user, so that the unscrupulous user can successfully use the forged palm feature information to successfully recognize the device through the palm. This creates a security risk. Generally, the method of forging the palm feature information may be printing palm feature information on the paper, photographing the palm feature information, manufacturing a palm model, and the like. For these forged palm feature information, the existing palm recognition device cannot detect that it is forged and thus may be identified.

For example, as shown in FIG. 3, FIG. 4 and FIG. 5, FIG. 3 is a schematic diagram of a palmprint image acquired by the image acquisition device, FIG. 4 is a schematic diagram of a palm vein image acquired by the image acquisition device, and FIG. 5 is an image acquisition device. A schematic representation of the palmprint and palm vein images obtained. The palm print image includes palm print information, and the palm vein image includes palm vein information, palm print, and palm vein image including palm print information and palm vein information. Palm print information and palm vein information are different palm feature information. Whether the palm to be detected is forged or in vivo, the image capturing device can acquire the palm feature information images as shown in FIG. 3 to FIG. 5, and the palm feature information images can also be used for palm features in the palm recognition device. Identification of information and possible identification.

However, when the living body is illuminated by the light source, the spectrum of the light emitted by the light source is different, that is, when the light source uses different light bands, the light of different wavelengths is different from the reflection of the living body palm, and the living body palm can be collected by the image collecting device. Different palm characteristics information. The forged palm feature information does not. The non-living palm does not change the palm feature information of the non-living palm obtained by the image acquisition device under different spectral illumination.

The palm detecting device of the embodiment of the present invention utilizes the above principle to detect whether the palm to be detected is a living palm. In some embodiments, if the palm detecting device further has a palm feature recognition function, after detecting that the palm to be detected is a living palm, the palm of the palm to be detected is collected. The information is collected to identify the palm feature information. Whether the palm of the test is first detected is the detection of the living palm, and the forged palm feature information can be identified, thereby improving the accuracy of the subsequent palm feature information recognition.

As shown in FIG. 1, the palm detecting device includes a first light source 103, a second light source 104, and an image capturing device 105. In some embodiments, the image capture device 105 of the palm detecting device includes a lens 106 and a filter 107 through which image information can be acquired.

The light emitted by the first light source 103 and the second light source 104 includes different optical wavelength bands. Under different illumination of the optical wavelength band, the palm feature information of the living palm obtained by the palm detecting device through the image capturing device is different, and the non-living palm is different. Under the illumination of the light band, the palm feature information of the non-living palm obtained by the palm detecting device through the image collecting device is the same.

For example, when the light emitted by the first light source is a blue light band, and the light emitted by the second light source is a near-infrared light band, the image of the living palm obtained by the palm detecting device through the image capturing device is irradiated by the light source of the living body palm in the blue light band. The palmprint information is included without the palm vein information, such as the palmprint image as shown in FIG. Under the illumination of the light source of the living body palm in the near-infrared light band, the image of the living body palm acquired by the palm detecting device through the image capturing device includes palm vein information without including palmprint information, for example, a palm vein image as shown in FIG. When the living palm is illuminated by the light source of the blue light band and the near-infrared light band, the image of the living body palm obtained by the palm detecting device through the image capturing device includes palm vein information and palm print information, for example, the palm vein and the figure shown in FIG. Palm print image. These palm vein information and palmprint information belong to different palm characteristics information.

If the palm to be detected is a non-living palm, the image acquisition device acquires the same palm feature information of the non-living palm regardless of the light source of the light band, that is, what the palm feature information is included in the non-living palm, in different Under the illumination of the light source of the wave section, the image acquisition device acquires the palm feature information of the non-living palm.

The palm detecting device can control the operation of the first light source and the second light source through the circuit control device thereon, thereby generating different light source working modes, for example, using the first light source to illuminate without using the second light source, and using the second light source and The light source operating modes are not used without using the first light source while using the first light source and the second light source. The light source used in different light source working modes includes different light bands, and the palm of the living body is illuminated by the light band of different light source working modes, and the palm detecting device passes the image. The palm feature information of the living palm obtained by the collecting device is different. When the non-living palm is illuminated by the light band of different light source working modes, the palm feature information of the non-living palm obtained by the palm detecting device through the image collecting device is the same.

On the palm detecting device, in the first light source working mode, the first image of the palm to be detected is acquired by the image capturing device; and in the second light source working mode, the second image of the palm to be detected is acquired by the image capturing device; According to the first image and the second image, it is determined whether the palm to be detected is a living palm. The light source used by the first light source operating mode and the light source used by the second light source operating mode include different optical bands, and the first light source operating mode and the second light source operating mode may be one of the light source operating modes as described above. Due to the difference of the wave sections, the living body palms are respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device acquires different palm feature information of the living palm through the image collecting device, and the non-living palms respectively Under the illumination of the light source of the first light source working mode and the light source of the second light source working mode, the palm detecting device acquires the same palm feature information of the non-living palm through the image capturing device. In this way, by alternately using the light source working modes including different wave segments, the palm detecting device respectively acquires different images of the palm to be detected through the image capturing device, and analyzes the different images to obtain whether the palm to be detected is a living palm, thereby The discrimination of the living palm is realized easily and efficiently.

In some embodiments, the image capture device includes a filter that is permeable to the optical band of the first source and the optical band of the second source. For example, the filter is a filter designed using a new process of segment coating to allow light from two different wavelength bands to pass through. For example, the filter can transmit a band of light emitted by the first source of the palm detecting device and a band of light emitted by the second source. Since the filter is specially processed, it can be matched with the adjusted exposure parameters to ensure that the image acquisition sensor can acquire a clear image when the first/second light source starts working.

For example, the light emitted by the first light source is a blue light blue light LED, the blue light band can be a band near 470 nm, the light emitted by the second light source is a near-infrared LED in the near-infrared light band, and the near-infrared light band can be a band near 850 nm. . Correspondingly, the filter can transmit through the near-infrared band and the blue band, and the spectral characteristic curve of the filter is as shown in FIG. 6. It can be seen from FIG. 6 that the filter designed by the new process of segment coating can transmit light of two different wavelength bands, and the center wavelengths of the light of the two different bands are 470 nm and 850 nm, respectively.

In some embodiments, the palm detecting device may further include an indicator light 108. When the palm detecting device detects the palm, if the palm or the detected object is not in the proper position, the palm detecting device acquires through the image capturing device. When the image to be detected is reached, the palm detecting device gives an indication by the indicator light 108.

In some embodiments, in order to ensure that the image acquired by the palm detecting device through the image capturing device is uniform and clear, the first light source and the second light source may be laid out on the palm detecting device according to a preset manner. For example, the first light source and the second light source can be disposed around the image capture device, respectively. As shown in FIG. 2, the blue LED and the near-infrared LED are respectively arranged on the palm detecting device by using a circular layout rule, and the blue LED and the near-infrared LED constitute a concentric circle, and the image capturing device is disposed on the blue LED and the near-infrared LED. The interior of the concentric circle. Therefore, the palm detecting device can obtain a clear palm print image under the illumination of the first light source, and a clear palm vein image can be obtained under the illumination of the second light source.

In some embodiments, the palm detecting device may include two different image capturing devices, one image capturing device corresponding to a light source, and the image is acquired when the light source illuminates the palm to be detected; the other image capturing device is used for another An image is acquired when a light source illuminates the palm to be detected.

In some embodiments, the lens of the image capture device can use two filters, such as ir-cut, and the dual filter switch can convert the infrared filter and the full transmission spectrum in different light source operating modes. Filter.

FIG. 7 is a flowchart of a palm detecting method according to an exemplary embodiment. With reference to FIG. 7, the method provided by the embodiment of the present invention is taken as an example of the implementation environment diagram and the foregoing content shown in FIG. 1 , which is applied to the palm detecting device, and the method of the palm detecting device is used to perform the method provided by the embodiment of the present invention. The process includes:

Step 701: Acquire a first image of the palm to be detected by the image capturing device in the first light source working mode;

Step 702: Acquire a second image of the palm to be detected by the image capturing device in the second light source working mode;

Step 703: Determine, according to the first image and the second image, whether the palm to be detected is a living palm;

Wherein, the light source used in the first light source working mode and the light source used in the second light source working mode include Different light bands,

Optionally,

The living palms are respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device acquires different palm feature information of the living body palm through the image capturing device, and the non-living palms are respectively in the working mode of the first light source. Under the illumination of the light source and the light source of the second light source working mode, the palm detecting device acquires the same palm feature information of the non-living palm through the image capturing device.

Optionally,

The first light source operates in a mode that uses the first light source and does not use the second light source, and the second light source operates in a mode that uses the second light source and does not use the first light source, wherein the first light source emits a light band and the second light source emits Different light bands,

Determining whether the palm to be detected is a living palm according to the first image and the second image comprises:

Determining that the palm to be detected is a living palm when the first image includes the first feature information and does not include the second feature information, and the second image includes the second feature information without including the first feature information;

Wherein, when the first light source is used and the second light source is not used, the palm detecting device can acquire the first feature information of the living palm through the image capturing device, and can obtain the second feature information of the living palm.

When the second light source is used and the first light source is not used, the palm detecting device can acquire the second feature information of the living palm through the image capturing device, and can obtain the first feature information of the living palm, the first feature information and the first feature information. The two feature information is different palm feature information.

Optionally,

The first light source operates in a mode that uses the first light source and does not use the second light source, and the second light source operates in a mode in which the first light source and the second light source are simultaneously illuminated, wherein the light band emitted by the first light source and the second light source emit Different light bands,

When the first image includes the first feature information and does not include the second feature information, and the second image includes the second feature information and the first feature information, determining that the palm to be detected is a living palm,

Wherein, when the first light source is used and the second light source is not used, the palm detecting device can acquire the first feature information of the living palm through the image capturing device, and can not obtain the second feature of the living palm. information;

When the first light source and the second light source are simultaneously irradiated, the palm detecting device can acquire the first feature information and the second feature information of the living body palm through the image capturing device, and the first feature information and the second feature information are different palm features. information.

Optionally,

Comparing the first image and the second image to obtain a matching degree, wherein the matching degree is used to indicate the degree of similarity between the first image and the second image;

Determine whether the matching degree is less than a preset threshold;

If the matching degree is less than the preset threshold, it is determined that the palm to be detected is a living palm, otherwise it is determined that the palm to be detected is a non-living palm.

Optionally,

The light source operating mode includes illuminating with the first light source and not using the second light source, illuminating with the second light source and not using the first light source, and simultaneously irradiating with the first light source and the second light source, the first light source working mode and the second light source working mode It belongs to one of the working modes of the light source, and the working mode of the first light source is different from the working mode of the second light source.

Optionally, the light source comprises a light source emitting a blue light band and a light source emitting a near-infrared light band, and the first light source and the second light source are one of the light sources.

Wherein, the image of the living palm obtained by the palm detecting device through the image capturing device includes the palmprint information and does not include the palm vein information under the illumination of the light source of the living body palm;

Under the illumination of the light source of the living body palm in the near-infrared light band, the image of the living body palm obtained by the palm detecting device through the image collecting device includes palm vein information without including palm print information;

When the living body palm is illuminated by the light source of the blue light band and the light source of the near-infrared light band, the image of the living body palm obtained by the palm detecting device through the image collecting device includes the palm vein information and the palm print information;

The palm print information and the palm vein information belong to different palm feature information.

Optionally, the method further includes:

Determining whether the position of the palm to be detected relative to the palm detecting device is in the image capturing area;

If the position of the palm to be detected relative to the palm detecting device is in the image capturing area, performing the first image in the first light source working mode, acquiring the first image of the palm to be detected by the image capturing device, and passing the image in the second light source working mode Obtaining, by the collecting device, a second image of the palm to be detected;

If the position of the palm to be detected relative to the palm detecting device is not in the image capturing area, a prompt message is issued.

Optionally,

The image capture device includes a filter that is permeable to the optical band of the first source and the optical band of the second source.

In summary, on the palm detecting device, in the first light source working mode, the first image of the palm to be detected is acquired by the image capturing device; and in the second light source working mode, the image of the palm to be detected is acquired by the image capturing device. Second image; then, according to the first image and the second image, it is determined whether the palm to be detected is a living palm. The light source used in the first light source working mode and the light source used in the second light source working mode include different light bands, and the light source of the living body palm is respectively irradiated in the working mode of the first light source and the light source in the working mode of the second light source due to different wave sections. Next, the palm detecting device acquires different palm feature information of the living body palm through the image capturing device, and the non-living palm is respectively irradiated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device acquires different living palms. Image information. In this way, by alternately using the light source working modes including different wave segments, the palm detecting device respectively acquires different images of the palm to be detected through the image capturing device, and analyzes the different images to obtain whether the palm to be detected is a living palm, thereby The discrimination of the living palm is realized easily and efficiently.

FIG. 8 is a flowchart of a palm detecting method according to an exemplary embodiment. With reference to FIG. 8, the method provided by the embodiment of the present invention is taken as an example of the implementation environment diagram and the foregoing content shown in FIG. 1 , which is applied to the palm detecting device, and the method of the palm detecting device is used to perform the method provided by the embodiment of the present invention. The process includes:

Step 801: Determine whether the position of the palm to be detected relative to the palm detecting device is in the image capturing area; if the position of the palm to be detected relative to the palm detecting device is in the image capturing area, step 803 and step 804 are performed;

The palm detecting device detects that the object to be detected is located in an image acquisition area of the palm detecting device When the palm detecting device starts the living palm detecting work, the palm detecting device determines the image before the object to be detected. For example, the palm detecting device determines whether the position of the palm to be detected relative to the palm detecting device is in the image capturing region; if the position of the palm to be detected relative to the palm detecting device is in the image capturing region, performing the image in the first light source working mode The acquiring device acquires the first image of the palm to be detected, and the step of acquiring the second image of the palm to be detected by the image capturing device in the second light source working mode. If the position of the palm to be detected relative to the palm detecting device is not in the image capturing area, step 802 is performed.

The method for detecting whether the position of the palm to be detected relative to the palm detecting device is in the image capturing area is not specifically limited in the embodiment of the present invention. For example, the palm detecting device may detect the palm by image analysis technology and distance detecting composite technology. The position is judged.

For the palm detecting device that performs the embodiment of the present invention, reference may be made to the description of the palm-using detecting device in the above-mentioned use scenario portion.

Step 802: Send a prompt message.

When the palm detecting device determines that the position of the palm to be detected relative to the palm detecting device is not in the image capturing region, the palm detecting device cannot acquire the image for analysis of the palm to be detected through the image capturing device thereon, so that the palm detecting device sends the image to the user. Prompt message.

The specific manner of issuing the prompt information may be: performing a voice prompt, for example, sending a voice to the user “please see the palm placed in the image acquisition area”, or by indicating an indicator light set on the palm detecting device, for example, when When the position of the palm to be detected relative to the palm detecting device is not in the image capturing area, the turn-on indicator flashes. Acquiring the first light source and/or the second light source disposed on the palm detecting device, the palm detecting device may also issue prompt information, for example, when the position of the palm to be detected relative to the palm detecting device is not in the image capturing region, the first light source and / or the second light source does not start working, the first light source and / or the second light source start to work when the position of the palm to be detected relative to the palm detecting device is in the image capturing area.

It can be understood that in some embodiments of the present invention, step 802 may not be included, or step 801 and step 802 may not be included.

Step 803: Acquire a first image of the palm to be detected by the image capturing device in the first light source working mode;

When the palm detecting device is in the first light source working mode, the first image of the palm to be detected is acquired by the image capturing device.

Step 804: Acquire a second image of the palm to be detected by the image capturing device in the second light source working mode;

When the palm detecting device is in the second light source working mode, the second image of the palm to be detected is acquired by the image capturing device.

The light source used in the first light source working mode and the light source used in the second light source working mode comprise different light bands, and the first light source working mode and the second light source working mode belong to different light source working modes.

Referring to the above-mentioned use scene portion, the palm inspection device may be provided with a plurality of light sources, wherein the light emitted by the different light sources includes different light bands, and preferably the light bands of different light sources do not overlap. In an embodiment of the present invention, the palm detecting device may be provided with two light sources emitting different optical bands, that is, the palm detecting device is provided with a first light source and a second light source, wherein the light band emitted by the first light source and the second light source The light source emits a different band of light. The palm detecting device can control the switches of the first light source and the second light source through the circuit control module thereon, thereby generating different light source working modes, for example, using the first light source to illuminate without using the second light source, and using the second light source and The three light source operating modes are illuminated without using the first light source while using the first light source and the second light source. The first light source working mode and the second light source working mode belong to one of the light source working modes, and the first light source working mode and the second light source working mode are different light source working modes.

The palm detecting device alternately uses different light source working modes to illuminate the palm to be detected, and the palm detecting device respectively acquires images of the palm to be detected under different light source working modes to perform detection of whether or not the living palm is detected. Through

steps

803 and 804, the palm detecting device obtains images of the palm to be detected in different light source working modes.

The execution sequence of the step 803 and the step 804 is not specifically limited in the embodiment of the present invention.

Step 805: Determine, according to the first image and the second image, whether the palm to be detected is a living palm;

The palm detecting device acquires different images of the palm to be detected in different light source working modes.

Because the living body palm is respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, the palm detecting device acquires different palm feature letters of the living body palm through the image collecting device. The non-living palms are respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device acquires the same palm feature information of the non-living palm through the image collecting device.

Therefore, the palm detecting device can determine whether the palm to be detected is a living palm according to the first image and the second image.

The specific method for determining whether the palm to be detected is a living body or not according to the first image and the second image has a plurality of specific methods, which are not specifically limited in the embodiment of the present invention. Two specific methods are exemplified below:

First, the palm feature information of the acquired image is compared with the preset palm feature information.

In different light source working modes, the palm detecting device respectively acquires an image, and the palm detecting device pre-establishes a corresponding relationship between the light source working mode and the palm feature information. Determining, according to the correspondence, the palm feature information corresponding to the working mode of the light source when the image is acquired, and then using the determined palm feature information to compare with the palm feature information of the image to determine whether it is the same type of palm feature information, and the first image After the second image is thus judged, it can be determined according to the judgment result whether the palm to be detected is a living palm.

Next, the first determination method will be described in a specific light source operation mode.

1. A combination of different light source working modes

The first light source operates in a mode in which the first light source is used and the second light source is not used.

The second light source operates in a mode in which the second light source is used and the first light source is not used.

Wherein the light band emitted by the first light source and the light band emitted by the second light source are different,

Therefore, the correspondence between the light source working mode and the palm feature information as shown in Table 1 can be pre-established on the palm detecting device.

Table I:

If the palm to be detected is a non-living palm, the palm detecting device acquires the same palm feature information in the first and second light source operating modes. That is, in the first and second light source working modes, the first feature information of the non-living palm is acquired, and the second feature information of the non-living palm is not obtained; or the first feature of the non-living palm is not obtained. The information acquires the second feature information of the non-living palm; or both the first feature letter and the second feature information of the non-living palm are acquired at the same time.

When the palm detecting device detects the palm to be recognized, the first and second images of the palm to be detected are acquired by the image capturing device on the first and second light source working modes, respectively, as in step 803 and step 804 above. The execution sequence of the step 803 and the step 804 is not limited in the embodiment of the present invention, as long as different light source operation modes can be alternately used. In the first light source working mode, after acquiring the first image, the palm detecting device may determine whether the first feature information is included on the first image without including the second feature information.

The method for determining the palm feature information of the image may be: the palm detecting device determines that the palm feature information corresponding to the working mode of the first light source includes the first feature information according to the correspondence between the working mode of the light source and the palm feature information. The second feature information is included; after the palm detecting device acquires the first image, the palm image feature information is recognized on the first image to determine which palm feature information is included in the first image, and the recognition result is obtained. It is then determined whether the recognition result includes the first feature information and does not include the second feature information.

Similarly, in the second light source working mode, after acquiring the second image, the palm detecting device determines whether the second feature information is included on the second image without including the first feature information.

The specific judging method is similar to the foregoing method for judging the first image, and the palm detecting device determines, according to the correspondence between the pre-established working mode of the light source and the palm feature information, that the palm feature information corresponding to the working mode of the second light source includes the second feature information. Without including the first feature information; palm detection device After acquiring the second image, the second image is identified by the palm feature information to determine which palm feature information is included in the second image, and the recognition result is obtained. It is then determined whether the recognition result is to include the second feature information without including the first feature information.

The step of determining whether the first feature information is included on the first image without including the second feature information, and determining whether the second feature information includes the second feature information and not including the first feature information is performed by the embodiment of the present invention. The order of execution is not specifically limited. When both of the judging steps are YES, it is determined that the palm to be detected is a living palm.

That is, determining whether the palm to be detected is a living palm according to the first image and the second image includes:

When the first image includes the first feature information and does not include the second feature information, and the second image includes the second feature information without including the first feature information, it is determined that the palm to be detected is a living palm.

2. Another combination of different light source working modes

The first light source operates in a mode in which the first light source is used and the second light source is not used, and the second light source operates in a mode in which the first light source and the second light source are simultaneously used.

Wherein, when the first light source is used and the second light source is not used, the palm detecting device can acquire the first feature information of the living palm through the image capturing device, and can obtain the second feature information of the living palm;

The correspondence between the light source working mode and the palm feature information as shown in Table 2 can be pre-established on the palm detecting device.

Table II

The palm detecting device may determine that the first image includes the first feature information and not the second feature information according to the correspondence, and the palm detecting device may determine, according to the correspondence, that the second image includes the second feature information. And first feature information. For the specific determination method, reference may be made to the image palm feature information determination method described above.

The embodiment of the present invention does not specifically limit the step of determining that the first image includes the first feature information and not the second feature information, and the step of determining that the second image includes the second feature information and the first feature information. When both of the judging steps are YES, it is determined that the palm to be detected is a living palm.

The specific arrangement of the first light source and the second light source has various modes. Hereinafter, the embodiment of the present invention will be described in detail with the light source including a light source emitting a blue light band and a light source emitting a near-infrared light band.

The first light source and the second light source belong to one of the light sources when the light source includes a light source that emits a blue light band and a light source that emits a near-infrared light band. The first light source may be a light source of a blue light band and the second light source may be a light source of a near-infrared light band, or the first light source may be a light source of a near-infrared light band and a light source of a blue light band of the second light source.

Correspondingly, the working mode of the light source comprises turning on the light source of the blue light band and turning off the light source in the near-infrared light band; turning on the light source in the near-infrared light band, and turning off the light source in the blue light band; simultaneously turning on the light source and the blue light using the near-infrared light band The light source of the band illuminates the three light source working modes, and the first light source working mode and the second light source working mode belong to one of the three light source working modes, and the first light source working mode and the second light source working mode are different.

In the embodiment of the present invention, an image including palm print information and not including palm vein information is called a palm print image, and an image including palm vein information and not including palm print information is called a palm vein image, including palm vein information and The image of the palm print information is called the palm print and the palm vein image.

If the palm to be detected is a non-living palm, in the above three light source working modes, the palm detecting device acquires the same palm feature information of the non-living palm. That is, in the first light source working mode or the second light source working mode, the palm detecting device either acquires the palm print image of the non-living palm; or both acquires the palm vein image of the non-living palm; or both acquire the non-living body at the same time. Palm palm and palm vein images of the palm. That is, in the first light source operation mode and the second light source operation mode, the image of the non-living palm acquired by the palm detecting device includes the same palm feature information.

Therefore, when the light source includes a light source emitting a blue light band and a light source emitting a near-infrared light band, and the first light source and the second light source belong to one of the two light sources, the case of the palm feature information detected by the palm detecting device includes : A palm print image, B palm vein image, C palm print and palm vein image.

If the palm to be detected is a non-living palm, such as a printed palm, the palm hand information of the relevant palm printed is generally one of the above three (A, B, C) conditions, and the palm characteristics detected when the light source is replaced. The type of information does not change.

If the palm to be detected is the living palm, the biometric characteristics of the relevant palm have the above three (A, B, C) conditions, and the palm feature information detected by the replacement of the light source will also undergo corresponding changes.

As shown in Table 3, Table 3 shows several situations of the palm feature information included in the non-living palm, and the palm feature information detected by the palm detecting device on the non-living palm and the living palm when the different light sources are working.

Table 3

According to the corresponding relationship between the living palms in Table 3 and the above description of the detection of the living body palm, it can be known that the palm feature information for detecting can be preset in the palm detecting device according to the working condition of different light sources, that is, the light source working mode is established in advance. Correspondence with the type of palm feature information, as shown in Table 4.

Table 4

That is, when the circuit control device controls the operation of the light source in the blue light band, the system presets the palm feature information to include the palm print information and does not include the palm vein information; when the circuit control device controls the near infrared light source to start working, the system presets the palm feature information. In order to include palm vein information and not including palmprint information; when the circuit control device controls the light source of the blue light band and the light source of the near infrared light band to work simultaneously, the system presets the palm feature information to include palm vein information and palm print information.

Therefore, in the first and second light source working modes, the palm detecting device determines the first/second light source working mode palm feature information according to the correspondence relationship of Table 4. After the palm feature information on the first image/second image is recognized, the recognized palm feature information is compared with the palm feature information determined according to the correspondence. It is judged whether the recognized palm feature information matches the palm feature information determined according to the correspondence relationship.

The method for the palm detecting device to recognize the palm feature information on the first image/second image may be: acquiring a plurality of palmprint images, palm vein images, palm prints and palm vein images in advance, and determining different kinds of images by statistical analysis. The law of information. The identification module is generated according to the statistical rule, and the identification module is set on the palm detection device. After the palm detecting device acquires the first image/second image, the palm detecting device can identify the first image/second image through the identifying module, and determine palm feature information on the first image/second image.

As shown in Table 5, Table 5 shows the palm feature information preset by the palm detecting device in different light source working modes, and the image and preset palm feature information when the palm detecting device acquires the image of the non-living palm or the living palm. The case of matching or not.

Table 5

It can be seen from the above that when the working modes of different light sources change, the palm detecting information acquired by the palm detecting device through the image collecting device also changes correspondingly, and the corresponding change relationship can be shown in Table 6.

Table 6

Therefore, in the first light source working mode and the second light source working mode, when the change of the palm feature information acquired on the first image and the second image obtained by the palm detecting device conforms to the situation shown in Table 6, the to-be-detected may be determined. The palm of the hand is the palm of the living body, otherwise it is the non-living palm.

That is, in the first and second light source operation modes, the palm detecting device determines the first/second light source working mode palm feature information according to the correspondence relationship of Table 4. After the palm feature information on the first image/second image is recognized, the palm feature information is compared with the palm feature information determined according to the correspondence relationship. If the palm feature information of the first image matches the corresponding preset palm feature information, and the palm feature information of the second image matches the corresponding preset palm feature information, the palm detecting device determines that the palm to be detected is a living palm. Otherwise, it is determined that the palm to be detected is a non-living palm.

Therefore, the specific work scenario can be as follows.

1) When the first light source working mode is a light source using a blue light band and a light source of a near-infrared light band is not used, according to the correspondence relationship shown in Table 4, the preset palm feature information corresponding to the first light source working mode is included Palmprint information does not include palm vein information.

In the first light source working mode, after the palm detecting device acquires the first image of the palm to be detected, the palm detecting device detects the palm feature information of the first image, and matches the palm feature information of the first image with the preset palm feature information. That is, it is determined whether the first image includes palm print information and does not include palm vein information.

When the working mode of the second light source is a light source using a near-infrared light band and a light source of a blue light band is not used, according to the correspondence relationship shown in Table 4, the preset palm feature information corresponding to the second light source working mode includes a palm vein. Information does not include palm print information.

In the second light source working mode, after the palm detecting device acquires the second image of the palm to be detected, the palm detecting device detects the palm feature information of the second image, and matches the palm feature information of the second image with the preset palm feature information. That is, it is determined whether the second image includes palm vein information and does not include palm print information.

When the first image includes palm print information and does not include palm vein information, and the second image includes palm vein information without including palm print information, the palm detecting device determines that the palm to be detected is the living palm, otherwise determines that the palm to be detected is not Living palms.

2) When the working mode of the first light source is a light source using a blue light band and a light source of a near-infrared light band is not used, according to the correspondence relationship shown in Table 4, the preset palm feature information corresponding to the working mode of the first light source is included Palmprint information does not include palm vein information.

In the first light source working mode, after the palm detecting device acquires the first image of the palm to be detected, the hand The palm detecting device detects the palm feature information of the first image, and matches the palm feature information of the first image with the preset palm feature information, that is, determines whether the first image includes palm print information and does not include palm vein information.

When the working mode of the second light source is to simultaneously use the light source of the near-infrared light band and the light source of the blue light band, according to the correspondence relationship shown in Table 4, the preset palm feature information corresponding to the working mode of the second light source includes the information of the palm vein. And palm print information.

In the second light source working mode, after the palm detecting device acquires the second image of the palm to be detected, the palm detecting device detects the palm feature information of the second image, and matches the palm feature information of the second image with the preset palm feature information. That is, it is determined whether the second image includes palm vein information and palm print information.

When the first image includes palm print information and does not include palm vein information, and the second image includes palm vein information and palm print information, the palm detecting device determines that the palm to be detected is a living palm, otherwise determines that the palm to be detected is a non-living palm.

3) When the first light source working mode is a light source using a near-infrared light band and a light source of a blue light band is not used, according to the correspondence relationship shown in Table 4, the preset palm feature information corresponding to the first light source working mode is included Palm vein information does not include palmprint information.

In the first light source working mode, after the palm detecting device acquires the first image of the palm to be detected, the palm detecting device detects the palm feature information of the first image, and matches the palm feature information of the first image with the preset palm feature information. That is, it is determined whether the first image includes palm vein information and does not include palm print information.

When the first image includes palm vein information and does not include palm print information, and the second image includes palm vein information and palm print information, the palm detecting device determines that the palm to be detected is a living palm, otherwise determines that the palm to be detected is a non-living palm.

According to the above three specific scenarios, the first feature information and the second feature information are one of palm vein information and palmprint information, and the first feature information and the second feature information are different. The first light source and the second light source belong to one of a light source in the infrared light band and a light source in the blue light band, and the first light source and the second light source are different. According to the working relationship between the first light source and the second light source, three light source working modes are available, and the first light source working mode and the second light source working mode belong to one of the three light source working modes, and the first light source working mode and the second The light source operating mode is a different light source operating mode.

Specifically:

1. When the first light source is a light source emitting a blue light band, and the second light source is a light source emitting a near-infrared light band, at this time, the first and second light source working modes include two cases:

1.1) The working mode of the first light source is to turn on the light source of the blue light band and turn off the light source of the near-infrared light band; the working mode of the second light source is to turn on the light source of the near-infrared light band, and turn off the light source of the blue light band.

1.2) The working mode of the first light source is to turn on the light source of the blue light band and turn off the light source of the near-infrared light band; the working mode of the second light source is to simultaneously turn on the light source of the blue light band and the light source of the near-infrared light band.

2. When the first light source is a light source emitting a near-infrared light band, and the second light source is a light source emitting a blue light band, the first and second light source working modes include two situations:

2.1) The first light source operates in a light source using a near-infrared light source and does not use a light source in the blue light band; and the second light source operates in a light source that uses a blue light source and does not use a near-infrared light source.

2.2) The working mode of the first light source is to turn on the light source of the near-infrared light band and not to use the light source of the blue light band; the working mode of the second light source is to simultaneously turn on the light source using the near-infrared light band and the light source of the blue light band.

In order to better explain the embodiments of the present invention, the embodiments of the present invention are described below by way of specific examples.

As shown in FIG. 1 and FIG. 2, the palm detecting device is provided with a first light source and a second light source, wherein the first light source is a light source of a blue light band, and the second light source is a light source of an infrared light band. The working mode of the light source preset on the palm detecting device is to execute the first light source working mode and then execute the second light source working mode, wherein the first The working mode of the light source is to turn on the light source of the blue light band and turn off the light source of the near infrared light band. The palm detecting device pre-establishes a correspondence between the first light source working mode and the first preset palm feature information, where the first preset palm feature information includes palm print information and does not include palm vein information;

The working mode of the second light source is to turn on the light source of the near-infrared light band, and turn off the light source of the blue light band, and the palm detecting device pre-establishes a correspondence relationship between the working mode of the second light source and the feature information of the second preset palm, the second preset palm The feature information includes palm vein information and does not include palm print information. Therefore, when the palm detecting device first uses the first light source working mode, and then uses the second light source working mode, the preset palm feature information changes from the first preset palm feature information to the second preset palm feature information.

As shown in FIG. 1 , when the user performs palm detection, the palm detecting device activates the first light source working mode, acquires the first image of the current palm to be detected through the image capturing device, and then the palm detecting device uses the second light source working mode to replace the first image. In the light source working mode, the second image of the palm to be detected is acquired by the image capturing device. The palm detecting device detects the palm feature information of the first image and the second image respectively, if the palm feature information of the first image matches the first preset palm feature information, that is, the first image includes palm print information and does not include palm vein information. For example, the palmprint image as shown in FIG. 3; and the palm feature information of the second image is consistent with the second preset palm feature information, that is, the second image includes palm vein information without including palmprint information, for example, as shown in FIG. In the palm vein image shown, the palm detecting device determines that the palm to be detected is a living palm, otherwise it is determined that the palm to be detected is a non-living palm.

Wherein, if the palm to be detected is the palm feature information printed on the paper sheet, after the first image and the second image acquired by the palm detecting device, the palm feature information of the first graphic may not match the first preset palm feature information. And/or the palm feature information of the second image may not coincide with the second preset palm feature information, for example, the first image includes palm print information and does not include palm vein information, and the second image includes palm print information instead of Including the palm vein information; or, the first image includes palm vein information without palm print information, and the second image includes palm vein information without palm print information; or the first image includes palm vein information and palm print information And the second image includes palm vein information and palm print information.

The above method is to identify the type of the palm feature information of the acquired image of the palm to be detected, and then compare and judge according to the preset palm feature information to determine whether the match is performed, thereby determining whether the palm to be detected is a living palm. The method described below is to directly compare the first image and the second image to determine whether the palm to be detected is a living palm.

Second, using the first image and the second image for similarity comparison

After performing step 801 to step 804, the specific method of determining whether the palm to be detected is a living palm according to the first image and the second image may be performed as follows:

Step A1: Comparing the first image and the second image to obtain a matching degree.

The degree of matching is used to indicate the degree of similarity between the first image and the second image;

Because the light source used in the first light source working mode and the light source used in the second light source working mode comprise different light bands, the living palm is respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device The palm-shaped feature information of the living body palm is acquired by the image capturing device, and the non-living palms are respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device acquires the same non-living palm through the image capturing device. Palm feature information. Therefore, in different light source working modes, the first image and the second image of the living body palm acquired by the palm detecting device are different, and the palm image feature information included in the first image and the second image is different. In different light source working modes, the first image and the second image of the non-living palm acquired by the palm detecting device are the same, and the first image and the second image include the same palm feature information.

Thus, based on the degree of similarity between the first image and the second image, it can be determined whether the palm to be detected is a living palm.

Step A2: Determine whether the matching degree is less than a preset threshold.

The degree of matching is used to indicate the degree of similarity between the first image and the second image, and the preset threshold is obtained based on experimental statistics. For example, in the first light source working mode and the second light source working mode, after acquiring a plurality of sets of the first image and the second image belonging to the same living body palm, comparing the first image and the second image belonging to the same living body palm And obtaining a plurality of sets of the first image and the second image belonging to the same non-living palm, comparing the first image and the second image belonging to the same non-living palm, and obtaining the preset threshold according to the comparison results .

If the similarity of the two images is greater than the preset threshold, the similarity of the two images is considered to be large, so that the two images are considered to belong to the forged palm. Otherwise, the two images are considered to belong to the living palm.

Step A3: If the matching degree is less than the preset threshold, it is determined that the palm to be detected is a living palm, otherwise it is determined that the palm to be detected is a non-living palm.

If the similarity between the first image and the second image is greater than the preset threshold, the similarity of the two images is considered to be large, so that the two images are considered to belong to the non-living palm. If the matching degree is less than the preset threshold, it is determined that the palm to be detected is a living palm.

For example, when the light source operation mode includes irradiating with the first light source and not using the second light source, irradiating with the second light source, and not using the first light source while irradiating with the first light source and the second light source, the first light source operating mode and the first light source The two light source working modes belong to one of the working modes of the light sources, and the first light source working mode is different from the second light source working mode.

If the palm to be detected is a non-living palm, in the above three light source working modes, the palm detecting device acquires the same palm feature information of the non-living palm. That is, in the first light source working mode or the second light source working mode, the palm detecting device obtains the palm print information of the non-living palm, and does not obtain the palm vein information of the non-living palm; or the non-living body is not obtained. The palmprint information of the palm, and the palm vein information of the non-living palm is obtained; or both the palmprint image and the palm vein information of the non-living palm are acquired at the same time. That is, in the first light source operation mode and the second light source operation mode, the image of the non-living palm acquired by the palm detecting device includes the same palm feature information.

Where the light source comprises a light source emitting a blue light band and a light source emitting a near-infrared light band, and the first light source and the second light source belong to one of the two light sources, the case of the palm feature information detected by the palm detecting device comprises: A palm Pattern image, B palm vein image, C palm print image, and palm vein image.

If the palm to be detected is a non-living palm, such as a printed palm, the palm of the palm of the hand is printed. The sign information is generally one of the above three (A, B, C) situations, and the type of palm feature information detected by the replacement of the light source does not change. That is, in the first light source working mode and the second light source working mode, the image of the non-living palm obtained by the palm detecting device includes the same palm feature information, for example, the palmprint image shown in FIG. 3, or both The palm vein images shown in Fig. 4, or both are palmprint and palm vein images as shown in Fig. 5, and two of the images in Figs. 3 to 5 are not acquired.

As shown in Table 3 above, Table 3 shows several situations of palm feature information included in the non-living palm, and palm feature information detected by the palm detecting device on the non-living palm and the living palm when the different light sources are working.

Therefore, it can be known that, when the palm detecting device alternately uses the first light source working mode and the second light source working mode, the palm detecting device acquires the first image and the second image of the living body palm respectively through the image capturing device thereon, as steps 803 and step 804. The first image and the second image are different in degree of similarity between the first image and the second image due to the difference in palm feature information included thereon. When the palm detecting device alternately uses the first light source working mode and the second light source working mode, the palm detecting device respectively acquires the first image and the second image of the non-living palm through the image capturing device thereon, the first image and the second image The image is identical because the palm feature information included thereon is the same, so that the first image and the second image are similar to each other. In order to distinguish the level of similarity, the palm test device can be used to test the living palm and the non-living palm, and the test result is statistically obtained to obtain a preset threshold, and the matching degree of the first image and the second image is greater than the preset threshold. And determining that the similarity between the first image and the second image is high, determining that the palm to be detected to which the first image and the second image belong is a non-living palm, and vice versa, determining the living palm.

The second method for comparing the similarity degree using the first image and the second image does not require the first image and the second image acquired by the palm detecting device to identify the palm feature information, as long as the first image and the second image are directly compared. The similarity of the images is sufficient. Such a comparison method can improve the detection efficiency of the palm detecting method of the embodiment of the present invention and simplify the algorithm on the palm detecting device.

It can be understood that the embodiment of the present invention is described by using the first light source working mode and the second light source working mode alternately by the palm detecting device. In some embodiments, the palm detecting device can be used more. The light source working mode, for example, according to the working relationship of the first light source and the second light source, three light source working modes are available, and the palm detecting device can alternately use the three light source working modes.

In summary, on the palm detecting device, in the first light source working mode, the first image of the palm to be detected is acquired by the image capturing device; and in the second light source working mode, the image of the palm to be detected is acquired by the image capturing device. Second image; then, according to the first image and the second image, it is determined whether the palm to be detected is a living palm. The light source used in the first light source working mode and the light source used in the second light source working mode include different light bands, and the light source of the living body palm is respectively irradiated in the working mode of the first light source and the light source in the working mode of the second light source due to different wave sections. Next, the palm detecting device acquires different palm feature information of the living body palm through the image capturing device, and the non-living palm is respectively irradiated by the light source of the first light source working mode and the second light source working mode, and the palm detecting device is acquired by the image collecting device. The same palm feature information to the non-living palm. In this way, by alternately using the light source working modes including different wave segments, the palm detecting device respectively acquires different images of the palm to be detected through the image capturing device, and analyzes the different images to obtain whether the palm to be detected is a living palm, thereby The discrimination of the living palm is realized easily and efficiently.

FIG. 9 is a schematic structural diagram of a palm detecting device according to an exemplary embodiment. The palm detecting device can perform the palm detecting method of the above embodiment, and the palm detecting device includes an image capturing device. Referring to FIG. 9, the palm detecting device provided by the embodiment of the present invention includes:

The image obtaining unit 901 is configured to acquire, by the image capturing device, the first image of the palm to be detected when the first light source operates in the mode;

The image acquisition unit 901 is further configured to acquire, by the image acquisition device, the second image of the palm to be detected when the second light source operates in the mode;

The determining unit 903 is configured to determine, according to the first image and the second image, whether the palm to be detected is a living palm;

Optionally,

The living palm is respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device acquires different palm feature information of the living palm through the image collecting device. The non-living palms are respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device acquires the same palm feature information of the non-living palm through the image collecting device.

Optionally,

The determining unit 903 is further configured to: when the first image includes the first feature information and not the second feature information, and the second image includes the second feature information and does not include the first feature information, determine that the palm to be detected is a living palm;

Optionally,

The determining unit 903 is further configured to: when the first image includes the first feature information and not the second feature information, and the second image includes the second feature information and the first feature information, determine that the palm to be detected is a living palm,

Optionally,

The determining unit 903 includes:

The comparison module 904 is configured to compare the first image and the second image to obtain a matching degree, where the matching degree is used to indicate the degree of similarity between the first image and the second image;

The determining module 905 is configured to determine whether the matching degree is less than a preset threshold;

The determining module 906 is configured to determine that the palm to be detected is a living palm if the matching degree is less than the preset threshold, and otherwise determine that the palm to be detected is a non-living palm.

Optionally,

Optionally, the light source comprises a light source emitting a blue light band and a light source emitting a near-infrared light band, and the first light source and the second light source belong to one of the light sources.

Optionally, the device further includes:

The area determining unit 902 is configured to determine whether the position of the palm to be detected relative to the palm detecting device is in the image acquiring area;

If the position of the palm to be detected relative to the palm detecting device is in the image capturing area, the image acquiring unit 901 performs the first image of the palm to be detected by the image capturing device in the first light source working mode, and the image acquiring unit 901 is in the first In the working mode of the two light sources, the image acquisition device acquires a step of detecting a second image of the palm;

Optionally

In summary, on the palm detecting device, the image acquiring unit 901 acquires the first image of the palm to be detected by the image capturing device in the first light source working mode; the image acquiring unit 901 passes the image in the second light source working mode. The acquiring device acquires a second image of the palm to be detected; then, the determining unit 903 determines whether the palm to be detected is a living palm according to the first image and the second image. The light source used in the first light source working mode and the light source used in the second light source working mode include different light bands, and the light source of the living body palm is respectively irradiated in the working mode of the first light source and the light source in the working mode of the second light source due to different wave sections. Next, the palm detecting device acquires different image information of the living palm. In this way, by alternately using the light source working modes including different wave segments, the palm detecting device respectively acquires different images of the palm to be detected through the image capturing device, and analyzes the different images to obtain whether the palm to be detected is a living palm, thereby The discrimination of the living palm is realized easily and efficiently.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, may be located in one place, or It can also be distributed to multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or the equivalents of the technical features are replaced by the equivalents of the technical solutions of the embodiments of the present invention.

Claims

A palm detecting method, characterized in that the method is applied to a palm detecting device, and the method comprises:

In the first light source working mode, acquiring a first image of the palm to be detected by the image capturing device;

Acquiring, by the image acquisition device, the second image of the palm to be detected;

Determining, according to the first image and the second image, whether the palm to be detected is a living palm;

Wherein, the light source used by the first light source working mode and the light source used by the second light source working mode comprise different optical bands.
The method of claim 1 wherein

The living palms are respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device acquires different palm feature information of the living body palm through the image collecting device, and the non-living palms are respectively When the light source of the first light source working mode and the light source of the second light source operating mode are illuminated, the palm detecting device acquires the same palm feature information of the non-living palm through the image capturing device.
The method of claim 1 wherein

The first light source operates in a mode of illuminating with a first light source and does not use a second light source, the second light source operating mode is illuminating with the second light source and not using the first light source, wherein the first light source The light band emitted by the light source is different from the light band emitted by the second light source,

Determining, according to the first image and the second image, whether the palm to be detected is a living palm, comprising:

Determining that the palm to be detected is determined when the first image includes first feature information and does not include second feature information, and the second image includes the second feature information without including the first feature information Living palm;

Wherein, when the first light source is used and the second light source is not used, the palm detecting device can acquire the first feature information of the living body palm through the image capturing device, and cannot obtain the first hand of the living body palm. Two characteristic information,

When the second light source is used and the first light source is not used, the palm detecting device passes The first feature information of the living palm is obtained by the image capturing device, and the first feature information and the second feature information are different palms. Feature information.
The method of claim 1 wherein

The first light source operates in a mode of using a first light source and does not use a second light source, and the second light source operates in a manner of simultaneously using the first light source and the second light source, wherein the first light source The emitted light band is different from the light band emitted by the second light source,

Determining, according to the first image and the second image, whether the palm to be detected is a living palm, comprising:

When the first image includes the first feature information and does not include the second feature information, and the second image includes the second feature information and the first feature information, determining that the palm to be detected is a living palm ,

Wherein, when the first light source is used and the second light source is not used, the palm detecting device can acquire the first feature information of the living body palm through the image capturing device, and cannot obtain the first hand of the living body palm. Two characteristic information;

When the first light source and the second light source are simultaneously illuminated, the palm detecting device can acquire the first feature information and the second feature information of the living body palm through the image capturing device, The first feature information and the second feature information are different palm feature information.
The method of claim 1 wherein

Determining, according to the first image and the second image, whether the palm to be detected is a living palm, comprising:

Comparing the first image and the second image to obtain a matching degree, wherein the matching degree is used to indicate a degree of similarity between the first image and the second image;

Determining whether the matching degree is less than a preset threshold;

If the matching degree is less than the preset threshold, it is determined that the palm to be detected is a living palm.
The method of claim 5 wherein:

The light source operating mode includes illuminating with the first light source and not using the second light source, illuminating with the second light source, and not using the first light source, while using the first light source and the second light source to illuminate, the first a light source operating mode and the second light source operating mode belonging to the light source operating mode In one of the first light source operating modes, the second light source operating mode is different.
The method according to claim 3 or 4 or 6, wherein said light source comprises a light source emitting a blue light band and a light source emitting a near-infrared light band, said first light source and said second light source belonging to said light source One of them,

Wherein, the image of the living body palm acquired by the palm detecting device through the image capturing device includes palm print information and does not include palm vein information under illumination of the light source of the blue light band;

The image of the living body palm acquired by the palm detecting device through the image capturing device includes palm vein information without including palm print information under illumination of the light source of the living body in the near-infrared light band;

The image of the living body palm acquired by the palm detecting device through the image capturing device includes palm vein information and palm print information, while the living palm is illuminated by the light source of the blue light band and the light source of the near-infrared light band;

The palm print information and the palm vein information belong to different palm feature information.
The method according to any one of claims 1 to 6, wherein the method further comprises:

Determining whether the position of the palm to be detected relative to the palm detecting device is in an image acquiring area;

If the position of the palm to be detected relative to the palm detecting device is in the image acquiring area, performing the first image in the first light source working mode, acquiring a first image of the palm to be detected by the image capturing device, and the In the second light source working mode, the step of acquiring the second image of the palm to be detected by the image capturing device;

If the position of the palm to be detected relative to the palm detecting device is not in the image capturing area, prompt information is issued.
A method according to any one of claims 1 to 6, wherein

The image capture device includes a filter that is permeable to an optical band of the first source and an optical band of the second source.
A palm detecting device, characterized in that the palm detecting device comprises an image capturing device, and the palm detecting device comprises:

An image acquisition unit, configured to acquire a to-be-checked by an image acquisition device when the first light source operates in a mode Measuring the first image of the palm;

The image acquisition unit is further configured to acquire, by the image acquisition device, the second image of the palm to be detected when the second light source operates in a mode;

a determining unit, configured to determine, according to the first image and the second image, whether the palm to be detected is a living palm;

Wherein, the light source used by the first light source working mode and the light source used by the second light source working mode comprise different optical bands.
The device according to claim 10, characterized in that

The living palms are respectively illuminated by the light source of the first light source working mode and the light source of the second light source working mode, and the palm detecting device acquires different palm feature information of the living body palm through the image collecting device, and the non-living palms are respectively at the first When the light source of the light source working mode and the light source of the second light source operating mode are illuminated, the palm detecting device acquires the same palm feature information of the non-living palm through the image capturing device.
The device according to claim 11 wherein:

The first light source operates in a mode of illuminating with a first light source and does not use a second light source, the second light source operating mode is illuminating with the second light source and not using the first light source, wherein the first light source The light band emitted by the light source is different from the light band emitted by the second light source,

The determining unit is further configured to: when the first image includes first feature information and does not include second feature information, and the second image includes the second feature information without including the first feature information Determining that the palm to be detected is a living palm;

Wherein, when the first light source is used and the second light source is not used, the palm detecting device can acquire the first feature information of the living body palm through the image capturing device, and cannot obtain the first hand of the living body palm. Two characteristic information,

When the second light source is used and the first light source is not used, the palm detecting device can acquire the second feature information of the living body palm through the image capturing device, and cannot obtain the living body palm. The first feature information, the first feature information and the second feature information are different palm feature information.
The device according to claim 10, characterized in that

The determining unit includes:

a comparison module, configured to compare the first image and the second image to obtain a matching degree, where the matching degree is used to indicate a degree of similarity between the first image and the second image;

a determining module, configured to determine whether the matching degree is less than a preset threshold;

The determining module is configured to determine that the palm to be detected is a living palm if the matching degree is less than a preset threshold, and otherwise determine that the palm to be detected is a non-living palm.