CN106934361B - Identification method and electronic equipment - Google Patents
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- CN106934361B CN106934361B CN201710128494.5A CN201710128494A CN106934361B CN 106934361 B CN106934361 B CN 106934361B CN 201710128494 A CN201710128494 A CN 201710128494A CN 106934361 B CN106934361 B CN 106934361B
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- 210000004204 blood vessel Anatomy 0.000 claims abstract description 12
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims description 25
- 238000010168 coupling process Methods 0.000 claims description 25
- 238000005859 coupling reaction Methods 0.000 claims description 25
- 230000003287 optical effect Effects 0.000 claims description 25
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- G—PHYSICS
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- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1347—Preprocessing; Feature extraction
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Abstract
The invention provides an identification method and an electronic device, wherein the electronic device comprises: a fingerprint acquisition unit, a physiological image acquisition unit and a processing unit; the fingerprint acquisition unit is used for acquiring a fingerprint image of a target; the physiological image capturing unit is used for capturing a physiological image of the target, and the physiological image comprises: at least one of an outline image of the target, a blood vessel image of the target, and a bone image of the target; the processing unit is used for identifying whether the owner of the target is a legal user of the electronic equipment by utilizing the fingerprint image and the physiological image.
Description
Technical Field
The present invention relates to user identification, and more particularly, to an identification method for identifying a user and an electronic device.
Background
Currently, fingerprint identification devices are commonly used in anti-theft systems, and almost all electronic products can be equipped with the fingerprint identification devices to protect personal information and the security of system operation. However, fingerprint recognition systems are still relatively hackable to some extent, such as printing a fingerprint off a fingerprint sensor. Thus, safety of the user may be affected.
Disclosure of Invention
The present invention provides an identification method and an electronic device to increase the accuracy of fingerprint identification.
In order to achieve the above object, according to a first aspect of the present invention, there is provided an electronic device comprising: a fingerprint acquisition unit, a physiological image acquisition unit and a processing unit; the fingerprint acquisition unit is used for acquiring a fingerprint image of a target; the physiological image capturing unit is used for capturing a physiological image of the target, and the physiological image comprises: at least one of an outline image of the target, a blood vessel image of the target, and a bone image of the target; the processing unit is used for identifying whether the owner of the target is a legal user of the electronic equipment by utilizing the fingerprint image and the physiological image.
Preferably, the processing unit performs image overlapping on the fingerprint image and the physiological image to obtain an overlapped image, calculates relative features of the physiological image relative to the fingerprint image according to the overlapped image, wherein the relative features include at least one of relative position and relative proportion, and compares the relative features with preset relative features of at least one preset overlapped image to identify whether the owner of the target is a legal user of the electronic device.
Preferably, the processing unit is further configured to compare the physiological image with at least one preset physiological image to determine at least one preset physiological image matching the physiological image in the at least one preset physiological image, and compare the relative feature with a preset relative feature of a preset overlapping image corresponding to the at least one matched preset physiological image to identify whether the owner of the target is a valid user of the electronic device.
Preferably, the processing unit is further configured to determine whether at least one preset fingerprint image matched with the fingerprint image exists in the at least one preset fingerprint image, and compare the relative feature with a preset relative feature of a preset overlapping image corresponding to the matched at least one preset fingerprint image when the at least one preset fingerprint image exists in the at least one preset fingerprint image matched with the fingerprint image.
Preferably, the physiological image is the outline image; the processing unit selects at least one reference positioning point according to the appearance image, selects a plurality of local images from the fingerprint image according to the at least one reference positioning point, and compares the plurality of local images with a plurality of local images of a preset fingerprint image to identify whether the owner of the target is a legal user of the electronic equipment.
Preferably, the processing unit determines the fingerprint coordinates and the fingerprint vectors of a plurality of specific locations on the fingerprint image to select the plurality of local images by using the at least one reference positioning point as a vector origin.
Preferably, the physiological image capturing unit is a physical touch sensing device, and when the target touches the physical touch sensing device, the physical touch sensing device captures the outline image.
Preferably, the physiological image capturing unit includes a light emitting device and an optical coupling device, the light emitting device is used for emitting light to irradiate the target, and the optical coupling device is used for capturing the physiological image when the light irradiates the target.
Preferably, the light-emitting element is arranged opposite to the optical coupling element, and when the light is incident to the optical coupling element through the target, the optical coupling element captures the physiological image; or the light-emitting element and the optical coupling element are arranged on the same side, and when the light is reflected by the target and then enters the optical coupling element, the optical coupling element captures the physiological image.
In a second aspect, the present invention provides an identification method for an electronic device, the identification method comprising: capturing a fingerprint image of a target and capturing a physiological image of the target, wherein the physiological image comprises: at least one of an outline image of the target, a blood vessel image of the target, and a bone image of the target; and identifying whether the owner of the target is a legal user of the electronic equipment by using the fingerprint image and the physiological image.
Preferably, the step of using the fingerprint image and the physiological image to identify whether the owner of the target is a legal user of the electronic device comprises:
overlapping the fingerprint image and the physiological image to obtain an overlapped image;
calculating relative features of the physiological image relative to the fingerprint image according to the overlapped image, wherein the relative features comprise at least one of relative positions and relative proportions;
and comparing the relative features with preset relative features of at least one preset overlapped image to identify whether the owner of the target is a legal user of the electronic equipment.
Preferably, the physiological image is the outline image; the step of using the fingerprint image and the physiological image to identify whether the owner of the target is a legal user of the electronic device includes:
selecting at least one reference positioning point on the outline image;
selecting a plurality of local images on the fingerprint image according to the at least one reference positioning point;
and comparing the plurality of local images with a plurality of preset local images of at least one preset fingerprint image to identify whether the owner of the target is a legal user of the electronic equipment.
Preferably, the step of selecting the plurality of local images according to the at least one reference positioning point on the fingerprint image comprises:
and determining the fingerprint coordinates and the fingerprint vectors of a plurality of specific positions on the fingerprint image by taking the at least one reference positioning point as a vector origin to select the plurality of local images.
Compared with the prior art, the identification method and the electronic equipment provided by the invention utilize the fingerprint image and the physiological image for identification to judge whether the target owner is a legal user of the electronic equipment, and because the fingerprint can be copied, the physiological image and the fingerprint image of each person can not be copied, the identification accuracy can be improved, and the safety of the electronic equipment can be enhanced.
Drawings
Fig. 1 is a block diagram of an electronic device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a physiological image capturing unit according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating another arrangement of a physiological image capturing unit according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a method for selecting a plurality of local images according to an embodiment of the present invention;
FIG. 5, FIG. 6 and FIG. 7 are schematic diagrams respectively illustrating a reference positioning point provided according to an embodiment of the present invention;
FIG. 8 is a flowchart illustrating an identification method according to an embodiment of the present invention;
FIG. 9 is a flowchart illustrating an identification method according to another embodiment of the present invention;
fig. 10 is a flowchart illustrating an identification method according to still another embodiment of the invention.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Fig. 1 is a block diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 1, the electronic device 100 may include a fingerprint acquisition unit 11, a physiological image acquisition unit 12, and a processing unit 13. The fingerprint acquisition unit 11 is used for acquiring a fingerprint image of a target. The physiological image capturing unit 12 is used for capturing a physiological image of a target, the physiological image includes: at least one of an outline image of the target, a blood vessel image of the target, and a bone image of the target. The processing unit 13 is configured to identify whether the owner of the target is a valid user of the electronic device by using the fingerprint image and the physiological image. Therefore, the fingerprint image and the physiological image are used for identification to judge whether the owner of the target is a legal user of the electronic equipment, and the fingerprint can be copied, but the physiological image and the fingerprint image of each person can not be copied almost, so that the identification accuracy can be improved, and the safety of the electronic equipment is enhanced.
In practical applications, the electronic device 100 may be a mobile phone, a palm computer, etc., and after the electronic device 100 recognizes that the owner of the target is a legal user of the electronic device 100, the electronic device 100 may perform an unlocking operation, etc. In practical applications, the electronic device 100 may also be an electronic lock installed on a door, and after the electronic device 100 recognizes that the owner of the target is a legal user of the electronic device 100, the electronic device 100 may perform an automatic unlocking operation. The object may be a finger or a hand (i.e., finger and palm).
Preferably, the physiological image capturing unit 12 may include a light emitting device 121 and an optical coupling device 122, wherein the light emitting device 121 is configured to emit light to illuminate the target, and the optical coupling device 122 is configured to capture the physiological image by the optical coupling device 122 when the light is illuminated to the target. Fig. 2 is a schematic diagram of a setup of a physiological image capturing unit 12 according to an embodiment of the present invention. Further, as shown in fig. 2, the light emitting device 121 and the optical coupling device 122 are disposed opposite to each other, and when light is incident to the optical coupling device 122 through a target, the optical coupling device 122 captures a physiological image. Fig. 3 is a schematic diagram illustrating another arrangement of the physiological image capturing unit 12 according to the embodiment of the present invention. Further, as shown in fig. 3, the light emitting device 121 and the optical coupling device 122 are disposed on the same side, and when the light is reflected by the target and then enters the optical coupling device 122, the optical coupling device 122 captures the physiological image. In fig. 2 and 3, the object is taken as a finger for illustration, but the present invention is not limited thereto. The optical coupling element 122 may be a Charge-coupled Device (CCD), a Complementary Metal Oxide Semiconductor (CMOS), or the like.
In an embodiment of the invention, the processing unit 13 is configured to perform image overlapping on the fingerprint image and the physiological image to obtain an overlapped image, calculate a relative feature of the physiological image with respect to the fingerprint image according to the overlapped image, where the relative feature includes at least one of a relative position and a relative proportion, and compare the relative feature with a preset relative feature of at least one preset overlapped image to identify whether the owner of the target is a legal user of the electronic device 100. Therefore, the relative characteristics of the overlapped images after the image overlapping is carried out on the fingerprint image and the physiological image are used for identifying to judge whether the owner of the target is a legal user of the electronic equipment, because the fingerprint can be copied, but the image after the target appearance, blood vessels and/or bones of each person and the fingerprint thereof are overlapped is almost impossible to copy, so that the relative characteristics (such as relative proportion and relative position) of the target appearance, blood vessels and/or bones and the fingerprint are unique, the identification accuracy is improved, and the safety of the electronic equipment is enhanced.
In this embodiment, preferably, the processing unit 13 is further configured to compare the physiological image with at least one preset physiological image to determine at least one preset physiological image matching the physiological image in the at least one preset physiological image, and compare the relative feature with a preset relative feature of a preset overlapping image corresponding to the at least one matched preset physiological image to identify whether the owner of the target is a legal user of the electronic device 100. Therefore, at least one preset physiological image matched with the physiological image is found out before the relative characteristics of the overlapped images are compared, and the identification speed can be accelerated because the physiological image has less details relative to the overlapped images.
In this embodiment, preferably, the processing unit 13 is further configured to determine whether at least one predetermined fingerprint image matching the fingerprint image exists in the at least one predetermined fingerprint image, and when at least one predetermined fingerprint image matching the fingerprint image exists in the at least one predetermined fingerprint image, compare the relative feature with a predetermined relative feature of a predetermined overlapped image corresponding to the at least one predetermined fingerprint image matching the relative feature. Therefore, the fingerprint images are compared before the relative features of the overlapped images are compared, so that the identification accuracy is further improved.
In another embodiment of the present invention, the physiological image is an external image, and the processing unit 13 is configured to select at least one reference positioning point according to the external image, select a plurality of local images from the fingerprint image according to the at least one reference positioning point, and compare the plurality of local images with a plurality of local images of a preset fingerprint image to identify whether the owner of the target is a valid user of the electronic device 100. Therefore, after the appearance image is obtained, a plurality of local images are selected from the fingerprint image according to at least one reference positioning point selected from the appearance image, the local images are compared with a plurality of local images of a preset fingerprint image to identify whether the owner of the target is a legal user of the electronic equipment, the compared data volume is small due to the fact that the local images are used, the identification result can be obtained relatively quickly, another rough fingerprint image is not needed, a plurality of fingerprint images are not needed to be stored, two processing units are not needed, and the appearance of the finger/hand is not needed to be measured or captured accurately.
In this embodiment, the physiological image capturing unit 12 can be a physical touch sensing device (e.g. a touch panel) for capturing the outline image when the object touches the physical touch sensing device.
In this embodiment, when the processing unit 13 selects the plurality of local images, the processing unit 13 may determine the fingerprint coordinates and the fingerprint vector of a plurality of specific locations on the fingerprint image by using at least one reference positioning point as a vector origin. In particular, the processing unit 13 may determine a plurality of location-specific fingerprint vectors using Scale Invariant Feature Transform (SIFT) features. Therefore, the reference positioning points are used for determining the fingerprint coordinates and the fingerprint vectors of a plurality of specific positions, more fingerprint images do not need to be stored, partial images on the fingerprint images are compared instead of the whole images, the accuracy is high, and the identification result can be obtained relatively quickly due to the fact that the comparison data amount is relatively small. In addition, when the reference positioning point is only the fingertip, the finger shape does not need to be accurately measured or captured, and the identification speed can be accelerated.
Fig. 4 is a schematic diagram of selecting a plurality of partial images according to an embodiment of the present invention. Fig. 5, fig. 6, and fig. 7 are schematic diagrams respectively illustrating a reference positioning point provided in the embodiment of the present invention. The at least one reference anchor point may be a fingertip, a point on the outline of the target, or a point on a knuckle, for example, as shown in fig. 4, the reference anchor points are three, three reference anchor points are a fingertip 21, and points 22 and 23 on the outline of the finger, as shown in fig. 5, 6 and 7, respectively, and the at least one reference anchor point may be a point on a knuckle 31, 32, 41, 42, 51 or 52.
Taking fig. 4 as an example to explain how the processing unit 13 selects a plurality of local images, as shown in fig. 4, the processing unit 13 determines the fingerprint coordinates and the fingerprint vectors of the arrow pointing positions of the lines 211 and 212 with the reference positioning point 21 as a vector origin, the processing unit 13 determines the fingerprint coordinates and the fingerprint vectors of the arrow pointing positions of the lines 221, 222 and 223 with the reference positioning point 22 as a vector origin, and the processing unit 13 determines the fingerprint coordinates and the fingerprint vectors of the arrow pointing positions of the lines 231, 232 and 233 with the reference positioning point 23 as a vector origin.
Fig. 8 is a flowchart illustrating an identification method according to an embodiment of the invention. The identification method shown in fig. 8 is applied to the electronic device 100, and as shown in fig. 8, the identification method may include: step S101, capturing a fingerprint image of a target, and capturing a physiological image of the target, the physiological image including: at least one of an outline image of the target, a blood vessel image of the target, and a bone image of the target. Step S102, using the fingerprint image and the physiological image to identify whether the owner of the target is a legal user of the electronic device. Therefore, the fingerprint image and the physiological image are used for identification to judge whether the owner of the target is a legal user of the electronic equipment, and the fingerprint can be copied, but the physiological image and the fingerprint image of each person can not be copied almost, so that the identification accuracy can be improved, and the safety of the electronic equipment is enhanced.
Fig. 9 is a flowchart illustrating an identification method according to another embodiment of the invention. The identification method shown in fig. 9 is applied to the electronic device 100, and as shown in fig. 9, the identification method may include: step S201, capturing a fingerprint image of a target, and capturing a physiological image of the target, wherein the physiological image includes: at least one of an outline image of the target, a blood vessel image of the target, and a bone image of the target. Step S202, overlapping the fingerprint image and the physiological image to obtain an overlapped image. Step S203, calculating relative features of the physiological image relative to the fingerprint image according to the overlapped images, wherein the relative features include at least one of relative positions and relative proportions. Step S204, comparing the relative feature with a preset relative feature of at least one preset overlapped image to identify whether the owner of the target is a legal user of the electronic device 100. Therefore, the relative characteristics of the overlapped images after the image overlapping is carried out on the fingerprint image and the physiological image are used for identifying to judge whether the owner of the target is a legal user of the electronic equipment, because the fingerprint can be copied, but the image after the target appearance, blood vessels and/or bones of each person and the fingerprint thereof are overlapped is almost impossible to copy, so that the relative characteristics (such as relative proportion and relative position) of the target appearance, blood vessels and/or bones and the fingerprint are unique, the identification accuracy is improved, and the safety of the electronic equipment is enhanced.
In this embodiment, preferably, before comparing the relative feature with the predetermined relative feature of the at least one predetermined overlay image, the identifying method further includes: comparing the physiological image with at least one preset physiological image to determine at least one preset physiological image matched with the physiological image; then, the step of comparing the relative feature with a preset relative feature of at least one preset overlapped image comprises: and comparing the relative features with preset relative features of preset overlapped images corresponding to the matched at least one preset physiological image. Therefore, at least one preset physiological image matched with the physiological image is found out before the relative characteristics of the overlapped images are compared, and the identification speed can be accelerated because the physiological image has less details relative to the overlapped images.
In this embodiment, preferably, before comparing the relative feature with the predetermined relative feature of the at least one predetermined overlay image, the identifying method further includes: and judging whether at least one preset fingerprint image matched with the fingerprint image exists in the at least one preset fingerprint image. If yes, comparing the relative features with preset relative features of a preset overlapped image corresponding to the matched at least one preset fingerprint image. Therefore, the fingerprint images are compared before the relative features of the overlapped images are compared, so that the identification accuracy is further improved.
Fig. 10 is a flowchart illustrating an identification method according to still another embodiment of the invention. The identification method shown in fig. 10 is applied to the electronic device 100, and as shown in fig. 10, the identification method may include: step S401, a fingerprint image of the target is captured, and an outline image of the target is captured. Step S402, selecting at least one reference positioning point on the outline image. Step S403, selecting a plurality of local images on the fingerprint image according to at least one reference positioning point. Step S404, comparing the plurality of local images with a plurality of preset local images of at least one preset fingerprint image to identify whether the owner of the target is a legal user of the electronic device. Therefore, after the appearance image is obtained, a plurality of local images are selected from the fingerprint image according to at least one reference positioning point selected from the appearance image, the local images are compared with a plurality of local images of a preset fingerprint image to identify whether the owner of the target is a legal user of the electronic equipment, the compared data volume is small due to the fact that the local images are used, the identification result can be obtained relatively quickly, another rough fingerprint image is not needed, a plurality of fingerprint images are not needed to be stored, two processing units are not needed, and the appearance of the finger/hand is not needed to be measured or captured accurately.
Step S403 may include: and determining fingerprint coordinates and fingerprint vectors of a plurality of specific positions on the fingerprint image by taking at least one reference positioning point as a vector origin to select a plurality of local images. Therefore, the reference positioning points are used for determining the fingerprint coordinates and the fingerprint vectors of a plurality of specific positions, more fingerprint images do not need to be stored, partial images on the fingerprint images are compared instead of the whole images, the accuracy is high, and the identification result can be obtained relatively quickly due to the fact that the comparison data amount is relatively small. In addition, when the reference positioning point is only the fingertip, the finger shape does not need to be accurately measured or captured, and the identification speed can be accelerated.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (6)
1. An electronic device, comprising:
the fingerprint acquisition unit is used for acquiring a fingerprint image of a target;
a physiological image capturing unit for capturing a physiological image of the target, the physiological image including: at least one of an outline image of the target, a blood vessel image of the target, and a bone image of the target;
the processing unit is used for identifying whether the owner of the target is a legal user of the electronic equipment by utilizing the fingerprint image and the physiological image;
the processing unit performs image overlapping on the fingerprint image and the physiological image to obtain an overlapped image, calculates relative features of the physiological image relative to the fingerprint image according to the overlapped image, wherein the relative features comprise at least one of relative positions and relative proportions, and compares the relative features with preset relative features of at least one preset overlapped image to identify whether the owner of the target is a legal user of the electronic equipment.
2. The electronic device of claim 1, wherein the processing unit is further configured to compare the physiological image with at least one predetermined physiological image to determine at least one predetermined physiological image of the at least one predetermined physiological image matching the physiological image, and compare the relative feature with a predetermined relative feature of a predetermined overlapping image corresponding to the at least one predetermined physiological image matching the relative feature to identify whether the owner of the target is a legitimate user of the electronic device.
3. The electronic device of claim 1, wherein the processing unit is further configured to determine whether at least one predetermined fingerprint image matching the fingerprint image exists in at least one predetermined fingerprint image, and when at least one predetermined fingerprint image matching the fingerprint image exists in the at least one predetermined fingerprint image, compare the relative feature with a predetermined relative feature of a predetermined overlapping image corresponding to the at least one matching predetermined fingerprint image.
4. The electronic device of claim 1, wherein the physiological image capturing unit comprises a light emitting device for emitting light to illuminate the target and an optical coupling device for capturing the physiological image when the light is illuminated to the target.
5. The electronic device of claim 4, wherein the light-emitting element is disposed opposite to the optical coupling element, and when the light is incident on the optical coupling element through the target, the optical coupling element captures the physiological image; or the light-emitting element and the optical coupling element are arranged on the same side, and when the light is reflected by the target and then enters the optical coupling element, the optical coupling element captures the physiological image.
6. An identification method for an electronic device, the identification method comprising:
capturing a fingerprint image of a target and capturing a physiological image of the target, wherein the physiological image comprises: at least one of an outline image of the target, a blood vessel image of the target, and a bone image of the target;
identifying whether the owner of the target is a legal user of the electronic equipment by using the fingerprint image and the physiological image;
wherein, the step of using the fingerprint image and the physiological image to identify whether the owner of the target is a legal user of the electronic device comprises:
overlapping the fingerprint image and the physiological image to obtain an overlapped image;
calculating relative features of the physiological image relative to the fingerprint image according to the overlapped image, wherein the relative features comprise at least one of relative positions and relative proportions;
and comparing the relative features with preset relative features of at least one preset overlapped image to identify whether the owner of the target is a legal user of the electronic equipment.
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| CN202011173214.0A CN112270260A (en) | 2017-03-06 | 2017-03-06 | Identification method and electronic equipment |
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| CN109247911B (en) * | 2018-07-25 | 2021-04-06 | 浙江工业大学 | Synchronous acquisition system for multi-mode finger features |
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| CN205621019U (en) * | 2016-03-07 | 2016-10-05 | 合肥芯福传感器技术有限公司 | Phased array biological identification information acquisition module |
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2017
- 2017-03-06 CN CN201710128494.5A patent/CN106934361B/en not_active Expired - Fee Related
- 2017-03-06 CN CN202011173214.0A patent/CN112270260A/en active Pending
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| Decision Fusion in a Multi-modal Identity Verification System Using a Multi-linear Classifier;PatrickVerlinde 等;《IDIAP Research Report》;19970630;第1-32页 * |
| 生物特征识别技术综述;郑方 等;《信息安全研究》;20160131;第2卷(第1期);第12-26页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106934361A (en) | 2017-07-07 |
| CN112270260A (en) | 2021-01-26 |
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