WO2010012215A1 - 一种双摄像头人脸识别装置和方法 - Google Patents
一种双摄像头人脸识别装置和方法 Download PDFInfo
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- WO2010012215A1 WO2010012215A1 PCT/CN2009/072928 CN2009072928W WO2010012215A1 WO 2010012215 A1 WO2010012215 A1 WO 2010012215A1 CN 2009072928 W CN2009072928 W CN 2009072928W WO 2010012215 A1 WO2010012215 A1 WO 2010012215A1
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- camera
- candidate
- candidate set
- face recognition
- face
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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
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
- G06V40/166—Detection; Localisation; Normalisation using acquisition arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/143—Sensing or illuminating at different wavelengths
Definitions
- the present invention relates to the field of biometric identification, and in particular to a face recognition apparatus and method, and more particularly to a dual camera face recognition apparatus and method. Background technique
- Biometrics is listed as one of the top ten technologies that have revolutionized human society in the 21st century. Biometrics is currently the most convenient and secure identification technology. Biometrics recognizes people themselves and does not require personal markers. Biometrics technology uses human physiological characteristics and behavioral characteristics to identify individuals, mainly fingerprint recognition, face recognition, iris recognition, and gait recognition. Among them, face recognition is a hot spot in the field of biometric identification. Compared with the widely used fingerprint recognition technology, it has obvious advantages such as intuitiveness, convenience, non-contact, friendliness and high user acceptance.
- the existing face recognition technology is divided into two-dimensional face recognition and three-dimensional face recognition.
- 3D face recognition is based on 3D face images, but there are always some shortcomings such as complex acquisition system and complicated face reconstruction algorithm.
- the invention patent "Zhang 1 3D face reconstruction system on the rotating platform” is disclosed as “CN 1595280A”.
- the invention patent "CN 1315092C” "3D face recognition method based on polar spectrum image”.
- three-dimensional face recognition is expensive, has few applications, and is too limited.
- Two-dimensional face recognition is based on a single plane image of a face. Generally, a face image is captured by a camera, and then face detection, human eye location and feature extraction are performed, and then compared with the template library, and finally recognition is made. .
- the recognition rate of a single face plane image acquired by a camera is affected by ambient light, acquisition angle, posture, expression, etc., and thus the recognition performance is low. Summary of the invention
- one or more embodiments of the present invention provide a dual camera face recognition apparatus and method, which can significantly improve the recognition performance of current two-dimensional face recognition.
- a dual camera face recognition device including: a first camera for collecting a face image; and a second camera disposed at a position different from the first camera for collecting a face
- An image recognition processing unit configured to receive and recognize a face image collected by the first camera, and obtain a first candidate set, and for receiving and identifying a face image collected by the second camera, and obtaining a second candidate set, selecting candidate objects whose similarity meets a predetermined rule in the first candidate set and the second candidate set As a result of the recognition.
- the face recognition device further includes: an infrared fixed active light source disposed behind the first camera and the second camera as a light source for collecting a face image.
- the identification device further includes an infrared transmission filter device, disposed in front of the first camera, for filtering visible light, collecting a black and white face image by the first camera; and an infrared cut filter device , disposed in front of the second camera, used to filter out infrared light, and the second camera captures a color face image.
- the face recognition device further comprises a display unit for receiving and displaying the color face image acquired by the second camera.
- the identification device further includes infrared transmission filter devices respectively disposed in front of the first and second cameras for filtering visible light, and collecting black and white face images by the first camera and the second camera. .
- the face recognition processing unit calculates a similarity sum of the first candidate set and the second candidate set belonging to the same candidate object; and determines whether the maximum value in the similarity sum is More than a predetermined threshold; when the maximum value is greater than a predetermined threshold, the candidate object corresponding to the maximum value is selected as the recognition result.
- the face recognition processing unit determines whether a maximum value among similarities of all candidate objects in the first candidate set and the second candidate set is greater than a predetermined threshold; when the maximum value is greater than a predetermined When the threshold is reached, the candidate corresponding to the maximum value is selected as the recognition result.
- the face recognition processing unit selects a candidate object whose similarity is greater than a first predetermined threshold in the first candidate set and selects a candidate whose similarity in the second candidate set is greater than a second predetermined threshold An object as a third candidate set; calculating a similarity sum of the same candidate objects in the third candidate set; and determining whether a maximum value in the similarity sum is greater than a third predetermined threshold; When the value is greater than the third predetermined threshold, the candidate object corresponding to the maximum value is selected as the recognition result.
- a dual camera face recognition method comprising the steps of: collecting a face image by a first camera; and collecting a face image by a second camera disposed at a position different from the first camera. Identifying a face image acquired by the first camera, obtaining a first candidate set, and identifying a face image collected by the second camera, and obtaining a second candidate set; Among the two candidate sets, candidate objects whose similarities meet the predetermined rules are selected as the recognition result.
- the face recognition method further includes: providing infrared fixed initiative for the first camera and the second camera
- the light source serves as a light source for collecting a face image.
- the step of the first camera capturing a face image includes: filtering visible light through an infrared transmission filter disposed in front of the first camera, and acquiring a black and white face image by the first camera;
- the step of capturing a face image by the second camera disposed at a position different from the first camera comprises: filtering the infrared light through an infrared cut filter disposed in front of the second camera to acquire a color face image.
- the method further comprises displaying the color face image acquired by the second camera on the display unit.
- the step of collecting a face image by the first camera and collecting the face image by the second camera disposed at a position different from the first camera includes: setting the first and second by respectively The infrared transmission filter device in front of the camera filters out visible light, and the black and white face image is acquired by the first camera and the second camera.
- the step of selecting a candidate object whose similarity meets a predetermined rule as the recognition result in the first candidate set and the second candidate set includes: calculating the first candidate set and the second candidate set A similarity sum of the same candidate object is determined; determining whether the maximum value in the summation of the similarities is greater than a predetermined threshold; when the maximum value is greater than a predetermined threshold, selecting a candidate object corresponding to the maximum value as the identification result.
- the step of selecting a candidate object whose similarity meets a predetermined rule as the recognition result in the first candidate set and the second candidate set includes: determining the first candidate set and the second candidate set ⁇ Whether the maximum value of the similarities of all the candidate objects is greater than a predetermined threshold; when the maximum value is greater than the predetermined threshold, the candidate object corresponding to the maximum value is selected as the recognition result.
- the step of selecting a candidate object whose similarity meets a predetermined rule as the recognition result in the first candidate set and the second candidate set includes: selecting a similarity in the first candidate set is greater than the first a predetermined threshold candidate candidate and a candidate object whose second candidate set ⁇ similarity is greater than a second predetermined threshold is selected as a third candidate set; and a similarity sum of the same candidate objects in the third candidate set is calculated; And determining whether the maximum value in the similarity sum is greater than a third predetermined threshold; when the maximum value is greater than the third predetermined threshold, selecting a candidate object corresponding to the maximum value as the recognition result.
- the face recognition device and method of the present invention adopts a dual camera for face collection and face recognition based on a commonly used single camera for face collection, and selects two candidate sets according to a predetermined rule. .
- the invention is simple and easy to implement and can significantly improve the recognition performance of current two-dimensional face recognition.
- the face recognition device according to the present invention can display a color face image on the display unit, giving the user a good feeling of use.
- FIG. 1 is a schematic diagram of a dual camera face recognition device in accordance with an embodiment of the present invention
- FIG. 2 is a schematic diagram of a dual camera face recognition device employing an infrared fixed active light source in accordance with an embodiment of the present invention
- FIG. 3 is a flow chart of a dual camera face recognition method according to a first embodiment of the present invention.
- FIG. 4 is a flow chart of a dual camera face recognition method according to a second embodiment of the present invention.
- Figure 5 is a flow chart of a dual camera face recognition method in accordance with a third embodiment of the present invention. detailed description
- the first camera 1 and the second camera 2 are respectively placed at different positions of an image suitable for capturing a face for collecting a face image. For example, it may be placed at a certain distance in the horizontal direction, or at a certain distance in the vertical direction, or the camera may be placed at other positions that are convenient for collecting facial images according to factors such as placement conditions, aesthetics, and concealment. Preferably they can be placed at the same height and at a certain interval, such as l () C ra .
- the first camera 1 and the second camera 2 are electrically connected to the face recognition processing unit 101, respectively, for signal transmission to the face recognition processing unit 101.
- the face recognition processing unit 101 can employ a PC platform or an embedded platform such as a DSP, an ARM, or the like.
- the person stands in a certain range in front of the first camera 1 and the second camera 2, and the face image is captured by the first camera 1 and the second camera 2, respectively, and the face image is transmitted to the face recognition processing unit 101.
- the face recognition processing unit 101 performs face recognition processing using the image information respectively captured by the two cameras to enhance the adaptability of the ordinary two-dimensional face recognition system to light, posture, and expression.
- an active light source may be provided for the face recognition device of the present invention.
- 2 is a schematic diagram of a dual camera face recognition device in accordance with an embodiment of the present invention.
- an infrared fixed active light source is used as a capture light source for the face image, so as to enhance the adaptability of the ordinary two-dimensional face recognition device to light.
- the infrared fixed active light source is composed of a plurality of infrared light emitting diodes having a uniform distribution, the center wavelength is 700 2000 nm, preferably 850 nm, and the light source can be disposed on the first camera 1 and the second camera. Behind 2. You should know that as long as you can The various light sources other than the present embodiment can be employed.
- the two cameras can collect face images of the same nature.
- infrared transmission filters are installed in front of the two cameras to filter visible light to capture black and white face images, or to set infrared in front of both cameras.
- two cameras can be used to collect face images of different natures. For example, one camera captures a black and white image and another camera captures a color image.
- an infrared transmission filter having a function of filtering out visible light, passing infrared light, or plating a filter film directly on the lens, in front of the lens of one of the cameras.
- an infrared cut filter having a function of filtering out infrared light, passing visible light, or plating a filter film directly on the lens in front of the lens of another camera. Capture color images.
- the image sensor of the camera can be either CMOS or CCD.
- the present invention is not limited to the limitations of the above embodiments, and those skilled in the art may perform various settings and changes on the image properties acquired by the camera according to various needs, and may additionally add additional images for capturing images of specific nature. The device does not depart from the scope of protection of the present invention.
- the face recognition device of the present invention may further include a display unit (not shown), which is collected by one of the first camera and the second camera. When coloring a face image, it is used to receive and display the color face image captured by the camera.
- FIG. 3 is a flow chart of a dual camera face recognition method according to a first embodiment of the present invention.
- the first camera and the second camera respectively start face recognition
- the first camera and the second camera respectively collect face images.
- the face recognition processing unit respectively recognizes the face images collected by the two cameras in steps 305 and 306, and obtains two sets of face recognition candidate sets A and B, and corresponding to each of the candidate sets A and B. Similarity. Assuming that the number of candidate objects in the set ⁇ and ⁇ are m and n respectively, in step 307, the sum of the similarities corresponding to the same candidate objects in the two sets of candidate sets A and B is calculated, and then the summation is added.
- the subsequent similarities are arranged in descending order, that is, the similarity ranking of the candidate objects is obtained.
- a ranking result that is ranked first in the similarity ranking is determined, that is, whether the maximum value of the similarity sum is greater than a predetermined threshold.
- the candidate corresponding to the maximum value is selected as the recognition result, as shown in step 309.
- the face recognition processing unit can perform face recognition on the basis of various recognition algorithms.
- the predetermined threshold is based on various factors such as the value of the similarity and the recognition rate. Experience value.
- step 401, 402 the first camera and the second camera respectively start face recognition
- steps 403 and 404 the face images are respectively captured by the first camera and the second camera.
- the face recognition processing unit respectively recognizes the face images collected by the two cameras in steps 405 and 406, and obtains two sets of face recognition candidate sets A and B, and corresponding candidates of each of the candidate sets ⁇ and ⁇ Similarity. It is assumed that the number of candidate objects in the set and B is m and n, respectively.
- step 407 it is determined whether the maximum value among the similarities of all the m+n candidate objects in the candidate set A and the candidate set B is greater than a predetermined threshold. When the maximum value is greater than the predetermined threshold, the candidate object corresponding to the maximum value is selected as the recognition result, as shown in step 408.
- FIG. 5 is a flowchart of a dual camera face recognition method according to a third embodiment of the present invention.
- the face recognition processing unit 101 first filters the candidate objects having the similarity among the candidate sets A and B for reservation, and then from the reserved candidates according to a predetermined rule.
- the candidate object is selected as the recognition result.
- steps 501, 502 the first camera and the second camera respectively start face recognition, and in steps 503 and 504, the first camera and the second camera respectively collect face images.
- the face recognition processing unit respectively recognizes the face images collected by the two cameras in steps 505 and 506, and obtains two sets of face recognition candidate sets, B, and similarities corresponding to each of the candidate sets A and B. degree.
- the candidate object in the candidate set ⁇ whose similarity is greater than the first predetermined threshold and the similarity in the selected candidate set B are greater than the second predetermined threshold are selected.
- the candidate object is the new candidate set C.
- the candidate objects selected from the set ⁇ are ml, and ml m
- the candidate objects selected from the set B are n l , and n i n.
- the similarities corresponding to the same candidate object among the ml + nl candidate objects of the candidate combination C are added and summed, and then the similarities after the addition and summation are arranged in descending order, that is, the candidate objects are obtained.
- step 509 it is determined whether the maximum value in the similarity ranking is equal, that is, whether the maximum value of the similarity sum is greater than a third predetermined threshold.
- step 510 when the maximum value is greater than the third predetermined threshold, the candidate object corresponding to the maximum value is selected as the recognition result.
- the first, second and third predetermined thresholds are empirical values obtained after repeated tests according to various factors such as the value of the similarity and the recognition rate. Depending on the nature of the image acquired by the camera, the first predetermined threshold may be equal to the second predetermined threshold, although they may also be different values.
- the invention provides a dual camera face recognition device based on the commonly used single camera face recognition device, which can significantly improve the recognition performance of the current two-dimensional face recognition.
- existing face recognition In order to reduce the influence of ambient light on the recognition operation, the system generally collects black and white face images for display and recognition, but the display of black and white images gives users a bad feeling of use. Therefore, how to collect black and white face images while giving The user brings a good feeling of use, and is also one of the beneficial effects brought by the present invention.
- the above is only a preferred embodiment of the present invention, and it should be noted that various modifications, alterations and changes can be made by those skilled in the art. These modifications, changes and variations are also intended to be included within the scope of the present invention without departing from the scope of the appended claims.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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BRPI0916407A BRPI0916407A2 (pt) | 2008-07-28 | 2009-07-27 | dispositivo e método de reconhecimento de face de câmera dupla |
US13/056,612 US8754934B2 (en) | 2008-07-28 | 2009-07-27 | Dual-camera face recognition device and method |
EP09802408A EP2306367A4 (en) | 2008-07-28 | 2009-07-27 | DEVICE AND METHOD FOR FACE RECOGNITION WITH TWO CAMERAS |
Applications Claiming Priority (2)
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CN200810117257XA CN101639891B (zh) | 2008-07-28 | 2008-07-28 | 一种双摄像头人脸识别装置和方法 |
CN200810117257.X | 2008-07-28 |
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WO2010012215A1 true WO2010012215A1 (zh) | 2010-02-04 |
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PCT/CN2009/072928 WO2010012215A1 (zh) | 2008-07-28 | 2009-07-27 | 一种双摄像头人脸识别装置和方法 |
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US (1) | US8754934B2 (zh) |
EP (1) | EP2306367A4 (zh) |
CN (1) | CN101639891B (zh) |
BR (1) | BRPI0916407A2 (zh) |
WO (1) | WO2010012215A1 (zh) |
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CN101639891B (zh) | 2012-05-02 |
US8754934B2 (en) | 2014-06-17 |
EP2306367A4 (en) | 2011-10-05 |
BRPI0916407A2 (pt) | 2016-02-16 |
CN101639891A (zh) | 2010-02-03 |
EP2306367A1 (en) | 2011-04-06 |
US20110128362A1 (en) | 2011-06-02 |
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