WO2018040147A1

WO2018040147A1 - Palm image acquisition device and method

Info

Publication number: WO2018040147A1
Application number: PCT/CN2016/099458
Authority: WO
Inventors: 李治农; 杨李木
Original assignee: 中控智慧科技股份有限公司
Priority date: 2016-08-31
Filing date: 2016-09-20
Publication date: 2018-03-08
Also published as: CN106295624A

Abstract

Disclosed is a palm image acquisition device, comprising a distance measuring assembly, an infrared camera assembly, and a controller. The distance measuring assembly is used for measuring the acquisition distance between a user's palm and the infrared camera assembly; the infrared camera assembly comprises multiple infrared cameras; the multiple infrared cameras have different photographing angles, and are used for photographing users' palm images at different acquisition distances; the controller is electrically connected to the distance measuring assembly and the infrared camera assembly, and is used for selecting, according to the acquisition distances, corresponding infrared cameras for photographing. The palm image acquisition device of the present invention has a wide acquisition area. Also disclosed is a palm image acquisition method.

Description

Palm image acquisition device and palm image acquisition method

The present invention claims the prior application priority of the application No. 201610790009.6, entitled "Hand Palm Image Acquisition Device and Palm Image Acquisition Method", which was filed on August 31, 2016, and the contents of the above-mentioned prior application are incorporated herein by reference. in.

Technical field

The present invention relates to the field of identity recognition devices, and in particular, to a palm image acquisition device and a palm image acquisition method.

Background technique

With the development of technology, more and more identification devices have been widely used in the market, such as attendance machines, access locks and so on. Today, with the rapid development of biometric systems, there are more and more types of identification devices, and more and more people need to collect and identify biometrics. Non-contact collectors are now very popular due to hygienic problems with some collectors. However, since the existing non-contact type collector has strict requirements on the distance between the collected object and the image collector, the collected object is likely to be too short or too far from the image collector. Being outside the collection area makes the collector's collection efficiency low or impossible to collect.

Summary of the invention

The technical problem to be solved by the present invention is to provide a palm image acquisition device with a wide collection area.

In addition, a palm image acquisition method is also provided.

In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:

In one aspect, a palm image acquisition device is provided, including a ranging component, an infrared camera assembly, and a controller, wherein the ranging component is configured to measure a collection distance between a user's palm and the infrared camera component, and the infrared camera component Included in the plurality of infrared cameras, the shooting angles of the plurality of infrared cameras are different, for capturing image of a user's palm at different collection distances, and the controller electrically connects the ranging component and the infrared camera component, Selecting the corresponding infrared according to the collection distance The camera takes a picture.

The plurality of infrared cameras include a first infrared camera having a first shooting angle and a second infrared camera having a second shooting angle, the second shooting angle being greater than the first shooting angle, for the same preset area The image of the first infrared camera is a first distance, and the focal length of the second infrared camera is a second distance;

The controller includes a comparison unit and a selection unit, the comparison unit is configured to compare a relationship between the collection distance and the first distance and the second distance, where the collection distance is greater than or equal to the first distance And the selecting unit selects the first infrared camera to perform shooting, and when the collecting distance is less than the first distance and greater than or equal to the second distance, the selecting unit selects the second infrared camera to perform shooting.

The plurality of infrared cameras further includes a third infrared camera having a third shooting angle, the third shooting angle being greater than the second shooting angle, and the third infrared camera is for the image of the preset area. The focal length is the third distance;

The comparing unit is further configured to compare a relationship between the collection distance and the third distance, where the selection distance is less than the second distance and greater than or equal to the third distance, the selecting unit selects the The third infrared camera performs shooting.

The plurality of infrared cameras further includes a fourth infrared camera having a fourth shooting angle, wherein the fourth shooting angle is greater than the third shooting angle, and the fourth infrared is for the image of the preset area The focal length of the camera is the fourth distance;

The comparing unit is further configured to compare a relationship between the collection distance and the fourth distance, where the selection distance is less than the third distance and greater than or equal to the fourth distance, the selecting unit selects the The fourth infrared camera is used for shooting.

The first distance, the second distance, the third distance, and the fourth distance constitute an arithmetic progression.

The first imaging angle, the second imaging angle, the third imaging angle, and the fourth imaging angle constitute an arithmetic progression.

Wherein, the palm image capturing device further comprises an infrared light source component for emitting infrared light, so that the user palm image can include user palm skin wrinkle image information and user palm subcutaneous vein image information.

The palm image capturing device further includes a housing, and the housing has a receiving space therein, and the infrared light source assembly, the infrared camera assembly, the distance measuring assembly, and the controller are all accommodated in the receiving space. The outer casing has opposite first and second openings for communicating the receiving space with the outer portion of the outer casing.

In addition, a palm image acquisition method is also provided, including:

The ranging component measures a collection distance between a user's palm and an infrared camera component, and the infrared camera component includes a plurality of infrared cameras, and the plurality of infrared cameras have different shooting angles, and are used for capturing the palms of the users at different collection distances. image;

The controller selects the corresponding infrared camera to perform shooting according to the collection distance.

Wherein, the “controller selects the corresponding infrared camera to perform shooting according to the collection distance” includes:

a comparison unit of the controller compares the relationship between the acquisition distance and a first distance and a second distance, the plurality of infrared cameras including a first infrared camera having a first imaging angle and a second infrared having a second imaging angle a camera, the second shooting angle is greater than the first shooting angle, the focal length of the first infrared camera is the first distance, and the focal length of the second infrared camera is Second distance

If the collection distance is greater than or equal to the first distance, the selection unit of the controller selects the first infrared camera to perform shooting, if the collection distance is less than the first distance and greater than or equal to the second distance And the selecting unit selects the second infrared camera to perform shooting.

Compared with the prior art, the present invention has the following beneficial effects:

The infrared camera assembly of the palm image capture device of the embodiment of the present invention includes a plurality of infrared cameras, and the shooting angles of the plurality of infrared cameras are different, so the infrared camera assembly can capture the palm of the user at different collection distances. The image enables the palm image capturing device to capture both the palm image of the user at a relatively close collection distance and the palm image of the user at a remote acquisition distance, and the collection area is wide, and the collection efficiency is high. The ranging component is capable of measuring a collection distance between the palm of the user and the infrared camera component, thereby assisting the infrared camera component to quickly select a corresponding infrared camera to perform shooting according to the collection distance, thereby further accelerating the The acquisition speed of the palm image acquisition device improves the collection efficiency.

DRAWINGS

In order to more clearly illustrate the technical solutions of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, which are common in the art. For the skilled person, other drawings can be obtained as shown in these drawings without any creative work.

FIG. 1 is a schematic structural diagram of a palm image capturing apparatus according to an embodiment of the present invention.

2 is an imaging angle diagram of an infrared camera assembly of a palm image acquisition device according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of measuring the distance between a user's palm and an infrared camera assembly according to an embodiment of the present invention.

4 is a schematic diagram of a shooting angle and an optimal shooting distance of a first infrared camera of a palm image capturing device according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of a shooting angle and an optimal shooting distance of a second infrared camera of a palm image capturing device according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of a shooting angle and an optimal shooting distance of a third infrared camera of a palm image capturing device according to an embodiment of the present invention.

FIG. 7 is a schematic diagram of a shooting angle and an optimal shooting distance of a fourth infrared camera of a palm image capturing device according to an embodiment of the present invention.

FIG. 8 is a schematic structural diagram of an infrared camera assembly of a palm image acquisition device according to an 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 those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In addition, the description of the following embodiments is provided to illustrate the specific embodiments in which the invention may be practiced. Directional terms mentioned in the present invention, for example, "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., only Is to refer to the direction of the additional schema, therefore, use The directional terms are used to describe and understand the present invention in a better and clearer manner, and are not intended to indicate or imply that the device or component referred to has a particular orientation, is constructed and operated in a particular orientation, and thus is not to be construed as a limit.

In the description of the present invention, it should be noted that the terms "installation", "connected", "connected", "disposed on" should be understood broadly, and may be, for example, The fixed connection may also be detachably connected or integrally connected; it may be a mechanical connection; it may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

Further, in the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specified. If the term "process" appears in the specification, it means not only an independent process, but also cannot be clearly distinguished from other processes, as long as the intended function of the process can be realized. In addition, the numerical range represented by "-" in this specification is a range in which the numerical value described before and after "-" is included as a minimum value and a maximum value, respectively. In the drawings, elements that are similar or identical in structure are denoted by the same reference numerals.

Referring to FIG. 1 to FIG. 7 , an embodiment of the present invention provides a palm image acquisition device 100 for collecting a palm image of a user. The palm image capture device 100 includes a ranging component 3, an infrared camera assembly 2, and a controller 7. The ranging component 3 is configured to measure an acquisition distance S between the palm of the user and the infrared camera assembly 2. The infrared camera assembly 2 includes a plurality of infrared cameras (21, 22, 23, 24), and the plurality of infrared cameras (21, 22, 23, 24) have different shooting angles, and are used for shooting at different collection distances. User palm image. The controller 7 is electrically connected to the ranging component 3 and the infrared camera component 2 for selecting a corresponding infrared camera (21 or 22 or 23 or 24) for shooting according to the collection distance S.

In this embodiment, the infrared camera assembly 2 includes a plurality of infrared cameras (21, 22, 23, 24), and the shooting angles of the plurality of infrared cameras (21, 22, 23, 24) are different (eg, 2 is shown, so that the infrared camera assembly 2 can capture images of the user's palm at different acquisition distances (as shown in FIGS. 4 to 7), so that the palm image acquisition device 100 can collect at a closer collection distance. The image of the user's palm can also collect the image of the user's palm at a remote collection distance, and the collection area is wide, and the collection efficiency is high. The ranging component 3 is capable of measuring the collection distance S of the user's palm and the infrared camera assembly 2, thereby assisting the infrared camera assembly 2 according to the collection distance S. The corresponding infrared camera (21 or 22 or 23 or 24) is quickly selected for shooting, thereby further accelerating the acquisition speed of the palm image capturing device 100 and improving the collection efficiency.

Wherein, as shown in FIG. 2, the symmetrical midlines of the shooting angles of the plurality of infrared cameras (21, 22, 23, 24) are as collinear or parallel as possible.

Further, please refer to FIG. 1 to FIG. 8 as an optional embodiment, the plurality of infrared cameras (21, 22, 23, 24) include a first infrared camera 21, a second infrared camera 22, and a A three-infrared camera 23 and a fourth infrared camera 24. The first infrared camera 21 has a first shooting angle A1. The focal length of the first infrared camera 21 is a first distance S1 for an image of a preset area. The second infrared camera 22 has a second shooting angle A2 that is greater than the first shooting angle A1. The focal length of the second infrared camera 22 is the second distance S2 for the image of the preset area (ie, the same preset area as the preset area). The third infrared camera 23 has a third shooting angle A3, and the third shooting angle A3 is greater than the second shooting angle A2. The focal length of the third infrared camera 23 is the third distance S3 for the preset area. The fourth infrared camera 24 has a fourth shooting angle A4 that is greater than the third shooting angle A3. For the preset area, the focal length of the fourth infrared camera 24 is the fourth distance S4.

The controller 7 includes a comparison unit and a selection unit. The comparison unit is configured to compare the relationship between the collection distance S and the first distance S1, the second distance S2, the third distance S3, and the fourth distance S4. When the collection distance S is greater than or equal to the first distance S1, the selection unit selects the first infrared camera 21 to perform shooting; the collection distance S is smaller than the first distance S1 and greater than or equal to the second distance. In S2, the selecting unit selects the second infrared camera 22 to perform shooting; when the collecting distance S is smaller than the second distance S2 and greater than or equal to the third distance S3, the selecting unit selects the third The infrared camera 23 performs photographing; when the collection distance S is smaller than the third distance S3 and greater than or equal to the fourth distance S4, the selection unit selects the fourth infrared camera 24 to perform photographing.

It can be understood that the preset area is a preferred palm image area required for user identification, the first distance S1, the second distance S2, the third distance S3, and the first The four distances S4 are the optimal shooting distances of the first infrared camera 21, the second infrared camera 22, the third infrared camera 23, and the fourth infrared camera 24, respectively. This embodiment The controller can enable the infrared camera assembly 2 to capture a user's palm image that is greater than or equal to the preset area to meet the needs of user identification analysis.

Preferably, the parameter settings of the first infrared camera 21, the second infrared camera 22, the third infrared camera 23, and the fourth infrared camera 24 may be in various designs. For example, the first distance S1, the second distance S2, the third distance S3, and the fourth distance S4 may be configured to form an arithmetic progression. That is, the difference between the first distance S1 and the second distance S2, the difference between the second distance S2 and the third distance S3, the difference between the third distance S3 and the fourth distance S4 is equal. Alternatively, the first imaging angle A1, the second imaging angle A2, the third imaging angle A3, and the fourth imaging angle A4 are configured to form an arithmetic progression. That is, the difference between the first photographing angle A1 and the second photographing angle A2, the difference between the second photographing angle A2 and the third photographing angle A3, the third photographing angle A3 and the fourth The difference in shooting angle A4 is equal.

It can be understood that the plurality of infrared cameras (21, 22, 23, 24) may also include other infrared cameras.

For example, the plurality of infrared cameras (21, 22, 23, 24) may further include a fifth infrared camera having a fifth shooting angle, the fifth shooting angle being greater than the second shooting angle A2 is smaller than the third shooting angle A3. For the preset area, the focal length of the fifth infrared camera is the fifth distance. The comparison unit is further configured to compare a relationship between the collection distance S and the fifth distance. When the collection distance S is smaller than the second distance S2 and greater than or equal to the fifth distance, the selection unit selects the fifth infrared camera to perform shooting; the collection distance S is smaller than the fifth distance and is greater than or equal to At the third distance S3, the selection unit selects the third infrared camera 23 to perform photographing.

In this embodiment, according to the usage habits of the user group, the focal lengths (ie, the optimal shooting distances) of the plurality of infrared cameras (21, 22, 23, 24) for the preset area are different. Arrange. For example, in the range of the collection area (which can be converted into the corresponding collection distance S) that the user's palm often places, more infrared cameras are set; in the collection area where the user's palm is not often placed (can be converted into corresponding Within the range of the acquisition distance S), fewer infrared cameras are provided. Therefore, the palm image capturing device 100 can both quickly identify the user and reduce the production cost and the energy consumption.

Preferably, the plurality of infrared cameras (21, 22, 23, 24) adopt a resolution of megapixels to improve the recognition accuracy of the palm image capturing device 100.

Further, the palm image capturing device 100 further includes an infrared light source assembly 1 for emitting infrared light, so that the user's palm image can include user palm skin wrinkle image information and user's palm subcutaneous vein image information to improve the palm. The recognition accuracy of the image capture device 100 realizes an anti-counterfeiting function.

Further, referring to FIG. 1 and FIG. 3, as an alternative embodiment, the palm image capture device 100 further includes a housing 4. The accommodating space 40 is formed inside the casing 4 , and the infrared light source unit 1 , the infrared camera unit 2 , the distance measuring unit 3 , and the controller 7 are all accommodated in the accommodating space 40 . The outer casing 4 has opposite first and second openings for communicating the accommodating space 40 with the outer portion of the outer casing 4. The infrared light emitted by the infrared light source assembly 1 can be emitted from the first opening or the second opening to the outer casing 4, and the ranging assembly 3 measures the size of the collection distance S through the same opening. The infrared camera unit 2 captures the image of the user's palm through the same opening.

Preferably, the palm image capture device 100 further includes a panel 5 and a motherboard 6. The panel 5 is connected to the outer casing 4 and covers the first opening. The panel 5 is made of a light transmissive material. The main board 6 is connected to the outer casing 4 and covers the second opening, and the main board 6 is used to carry the infrared light source assembly 1, the infrared camera assembly 2, and the distance measuring assembly 3.

Referring to FIG. 1 to FIG. 8 together, an embodiment of the present invention further provides a palm image acquisition method for collecting a palm image of a user. The palm image acquisition method can be applied to the palm image acquisition device 100 described in any of the above embodiments. The palm image acquisition method includes:

Step 1: The ranging component 3 measures the acquisition distance S between the user's palm and the infrared camera assembly 2, and the infrared camera assembly 2 includes a plurality of infrared cameras (21, 22, 23, 24), and the plurality of infrared cameras (21) , 22, 23, 24) shooting angles are different, used to capture the image of the user's palm at different collection distances; and

Step 2: The controller 7 selects the corresponding infrared camera (21 or 22 or 23 or 24) to perform shooting according to the collection distance S.

In this embodiment, the palm image acquisition method can not only capture the image of the user's palm at a relatively close collection distance, but also capture the image of the user's palm at a remote collection distance, and the collection area is wide. The collection efficiency is high. The controller 7 selects the corresponding infrared camera (21 or 22 or 23 or 24) to perform shooting according to the collection distance S, and can further speed up the collection speed and improve the collection efficiency.

Further, as an optional embodiment, the “controller 7 selects the corresponding infrared camera to perform shooting according to the collection distance S (21 or 22 or 23 or 24)” (ie, Step 2) includes:

Step 21: The comparison unit of the controller 7 compares the relationship between the acquisition distance S and the first distance S1 and the second distance S2, the plurality of infrared cameras including the first infrared camera 21 having the first shooting angle A1 and having The second infrared camera 22 of the second shooting angle A2, the second shooting angle A2 is greater than the first shooting angle A1, and the focal length of the first infrared camera 21 is the first for the image of the same preset area. The distance S1, the focal length of the second infrared camera 22 is the second distance S2;

Step 22: If the collection distance S is greater than or equal to the first distance S1, the selection unit of the controller 7 selects the first infrared camera 21 to perform shooting, if the collection distance S is smaller than the first distance S1 And greater than or equal to the second distance S2, the selection unit selects the second infrared camera 22 to perform shooting.

Of course, in other embodiments, in step Step 21, the comparing unit is further configured to compare the relationship between the collection distance S and the third distance S3 and the fourth distance S4. The plurality of infrared cameras include a third infrared camera 23 having a third shooting angle A3 and a fourth infrared camera 24 having a fourth shooting angle A4. The fourth shooting angle A4 is greater than the third shooting angle A3, and the third shooting angle A3 is greater than the second shooting angle A2. For the image of the same preset area, the focal length of the third infrared camera 23 is the third distance S3, and the focal length of the fourth infrared camera 24 is the fourth distance S4.

At this time, in step Step 22, if the collection distance S is smaller than the second distance S2 and greater than or equal to the third distance S3, the selection unit selects the third infrared camera 23 to perform shooting; When the collection distance S is smaller than the third distance S3 and greater than or equal to the fourth distance S4, the selection unit selects the fourth infrared camera 24 to perform shooting.

The embodiments of the present invention have been described in detail above, and the principles and implementations of the present invention are described in detail herein. The description of the above embodiments is only for helping to understand the method of the present invention and its core ideas; One of ordinary skill in the art, in accordance with the teachings of the present invention, The details of the present invention and the scope of the application are subject to change. The contents of the present specification are not to be construed as limiting the invention.

Claims

A palm image capturing device, comprising: a ranging component, an infrared camera component, and a controller, wherein the ranging component is configured to measure a collection distance between a user's palm and the infrared camera component, and the infrared camera component Included in the plurality of infrared cameras, the shooting angles of the plurality of infrared cameras are different, for capturing image of a user's palm at different collection distances, and the controller electrically connects the ranging component and the infrared camera component, The infrared camera is selected according to the collection distance to perform shooting.
The palm image capture device according to claim 1, wherein said plurality of infrared cameras comprise a first infrared camera having a first shooting angle and a second infrared camera having a second shooting angle, said second shooting The angle of the second infrared camera is a first distance, and the focal length of the second infrared camera is a second distance;

The controller includes a comparison unit and a selection unit, the comparison unit is configured to compare a relationship between the collection distance and the first distance and the second distance, where the collection distance is greater than or equal to the first distance And the selecting unit selects the first infrared camera to perform shooting, and when the collecting distance is less than the first distance and greater than or equal to the second distance, the selecting unit selects the second infrared camera to perform shooting.
The palm image capture device of claim 2, wherein the plurality of infrared cameras further comprise a third infrared camera having a third shooting angle, the third shooting angle being greater than the second shooting angle, The image of the preset area, the focal length of the third infrared camera is a third distance;

The comparing unit is further configured to compare a relationship between the collection distance and the third distance, where the selection distance is less than the second distance and greater than or equal to the third distance, the selecting unit selects the The third infrared camera performs shooting.
The palm image capture device of claim 3, wherein the plurality of infrared cameras further comprise a fourth infrared camera having a fourth shooting angle, wherein the fourth shooting angle is greater than the third shooting angle, The focal length of the fourth infrared camera is a fourth distance for the image of the preset area;

The comparing unit is further configured to compare a relationship between the collection distance and the fourth distance, where the selection distance is less than the third distance and greater than or equal to the fourth distance, the selecting unit selects the The fourth infrared camera is used for shooting.
The palm image acquisition device according to claim 4, wherein said first distance, said second distance, said third distance, and said fourth distance constitute an arithmetic progression.
The palm image acquisition device according to claim 4, wherein the first imaging angle, the second imaging angle, the third imaging angle, and the fourth imaging angle constitute an arithmetic progression.
The palm image capture device of claim 1 , wherein the palm image capture device further comprises an infrared light source component for emitting infrared light such that the user palm image can include user palm skin wrinkle image information and a user. Image of the subcutaneous vein of the palm.
The palm image capture device of claim 7, wherein the palm image capture device further comprises a housing, the housing forming an accommodation space therein, the infrared light source assembly, the infrared camera assembly, and the ranging The component and the controller are respectively received in the receiving space, and the outer casing has opposite first and second openings for communicating the receiving space and the outer portion of the outer casing.
A palm image acquisition method, comprising:

The ranging component measures a collection distance between a user's palm and an infrared camera component, and the infrared camera component includes a plurality of infrared cameras, and the plurality of infrared cameras have different shooting angles, and are used for capturing the palms of the users at different collection distances. image;

The controller selects the corresponding infrared camera to perform shooting according to the collection distance.
The palm image acquisition method according to claim 9, wherein the "controller selects the corresponding infrared camera to perform shooting according to the collection distance" includes:

a comparison unit of the controller compares the relationship between the acquisition distance and a first distance and a second distance, the plurality of infrared cameras including a first infrared camera having a first imaging angle and a second infrared having a second imaging angle a camera, the second shooting angle is greater than the first shooting angle, the focal length of the first infrared camera is the first distance, and the focal length of the second infrared camera is Second distance

If the collection distance is greater than or equal to the first distance, the selection unit of the controller selects The first infrared camera performs shooting, and if the collection distance is less than the first distance and greater than or equal to the second distance, the selecting unit selects the second infrared camera to perform shooting.