KR101718244B1 - Apparatus and method of processing wide angle image for recognizing face - Google Patents
Apparatus and method of processing wide angle image for recognizing face Download PDFInfo
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- KR101718244B1 KR101718244B1 KR1020150178670A KR20150178670A KR101718244B1 KR 101718244 B1 KR101718244 B1 KR 101718244B1 KR 1020150178670 A KR1020150178670 A KR 1020150178670A KR 20150178670 A KR20150178670 A KR 20150178670A KR 101718244 B1 KR101718244 B1 KR 101718244B1
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Abstract
The present invention relates to an apparatus and a method for processing a wide angle image for face recognition, and more particularly, to an apparatus and method for processing a wide angle image photographed through a wide angle camera module, A processor; And a face recognition unit for comparing one or more face images extracted by the image processing unit with registered images stored in a database and outputting recognition results.
Description
The present invention relates to a method for processing a wide-angle image in a system for recognizing a face from a photographed image using a wide-angle camera.
In recent years, in the case of a key or an access card, there is a lot of room for theft, loss, duplication, etc. Therefore, the security is relatively low, and it is necessary to carry it and to memorize the password. There are many researches on personal identification technologies with high performance and convenience.
Biometric identification systems are gradually becoming commercially available as personal identification technology. Biometric identification technology is a technology that recognizes body characteristics such as fingerprints, faces, irises, and veins that are different from person to person. Such body characteristics can not be used or copied by others like a key or a password, and can be used for security fields without any risk of being deformed or lost unless the body is damaged.
Among them, facial recognition technology is not complicated as compared with biometric techniques such as fingerprint or iris recognition. In addition, it is natural that the face recognition technology is natural and does not give a sense of rejection to the user when the image of the human being is stored using a camera. Furthermore, face recognition technology can be applied not only to the security field but also to various applications in accordance with the smartphone era.
However, the conventional face recognition apparatus has a problem that the face of a child with a small height can not be recognized due to limitation of the viewing angle of the camera.
Korean Patent No. 10-1427653 (a control method of a digital image processing apparatus for performing face recognition and a digital image processing apparatus employing this method) is known as a prior art document.
An object of the present invention is to provide a face recognition system using a wide-angle camera that can effectively recognize faces of various users and a face recognition method using the same.
The wide-angle image processing apparatus for face recognition according to an embodiment of the present invention includes an image processing unit for processing a wide-angle image photographed through the wide-angle camera module and converting the wide-angle image into a planar viewpoint image, ; And a face recognition unit for comparing one or more face images extracted by the image processing unit with registered images stored in a database and outputting recognition results.
According to another aspect of the present invention, there is provided a method for processing a wide-angle image for face recognition, the method comprising: processing an image photographed through a wide-angle camera module and converting the processed image into a planar viewpoint image; Extracting one or more face images from the transformed planar view image; And recognizing a face by comparing the extracted one or more face images with registered images stored in a database.
The wide-angle image processing method may be embodied as a computer-readable recording medium on which a program for execution in a computer is recorded.
According to an embodiment of the present invention, a face is recognized from an image photographed using a wide-angle camera, so that not only an adult with a large height but also a face such as a child with a small height can be recognized at the same time.
According to another embodiment of the present invention, a plurality of faces can be detected and recognized simultaneously from a captured image using a wide angle camera.
According to another embodiment of the present invention, a wide angle image photographed through a wide angle camera is converted into a single planar view image, and a face image in the converted planar view image is extracted, The face can be correctly recognized.
1 is a block diagram showing an embodiment of a configuration of a face recognition system using a wide angle camera according to the present invention.
FIG. 2 is a view for explaining an operation of the wide-angle camera module shown in FIG. 1. FIG.
3 is a flowchart illustrating a method of processing a wide-angle image for face recognition according to an embodiment of the present invention.
4 is a perspective view showing an embodiment of the configuration of the wide angle camera module.
5 to 8 are views for explaining embodiments of a method of processing a wide-angle image photographed through a wide-angle camera.
FIG. 9 is a block diagram showing an embodiment of the configuration of the face recognition unit shown in FIG. 1. FIG.
10 is a block diagram illustrating a configuration of a face recognition system using a wide angle camera according to another embodiment of the present invention.
FIG. 11 is a block diagram illustrating an exemplary configuration of a security system using face recognition according to an embodiment of the present invention. Referring to FIG.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.
Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.
In this specification, the term " part " includes a unit realized by hardware, a unit realized by software, and a unit realized by using both. Further, one unit may be implemented using two or more hardware, or two or more units may be implemented by one hardware.
In this specification, some of the operations or functions described as being performed by the terminal or the device may be performed in the server connected to the terminal or the device instead. Similarly, some of the operations or functions described as being performed by the server may also be performed on a terminal or device connected to the server.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
FIG. 1 is a block diagram of an embodiment of a face recognition system using a wide angle camera according to the present invention. The
1, the wide-
The wide-angle lens is a lens having a wide-angle field of view, and can photograph a large object with a short focal length and deep focal depth, or can photograph a wide range of areas.
Referring to FIG. 2, when a
For the face recognition, the
On the other hand, when photographing forward using the wide
In addition, since a wide range area in front of the wide
For this purpose, it is preferable that an image photographed through the wide-
For example, an image photographed through the wide-
The
In order to correct the distortion in the wide angle image as described above, the
A specific embodiment of a method of processing the wide angle image photographed through the wide
The
The
The
Hereinafter, the configuration of the
FIG. 3 is a flowchart illustrating a wide-angle image processing method for face recognition according to an exemplary embodiment of the present invention. Referring to FIG. 3, Will be described in connection with a block diagram showing an embodiment. In the meantime, among the wide-angle image processing methods shown in FIGs. 1 and 2, description about the same things as those described with reference to FIGS. 1 and 2 will be omitted.
3, the
As shown in FIG. 4, the wide-
On the other hand, the wide-
A plurality of people may be included in the wide-
In this case, the
In addition, the
As described above, the wide
More specifically, the wide-
The wide-
According to an embodiment of the present invention, the position of a viewpoint used by the wide-
7, the wide
8, the wide-
The
Thereafter, the
Referring to FIG. 9, the
For example, the
On the other hand, the
The
The
In addition, the matching
For example, the matching
As described above, when the
FIG. 10 is a block diagram illustrating a configuration of a face recognition system using a wide-angle camera according to another embodiment of the present invention. FIG. 11 is a block diagram of a configuration of a security system using face recognition according to the present invention, It is a road map. The description of the same components as those described with reference to Figs. 1 to 9 among the configurations shown in Figs. 10 and 11 will be omitted below.
10, the
The data or information transmitted from the
For example, when the user views the image transmitted from the
In this case, the
Also, the
For example, when the
According to another embodiment of the present invention, the
In this case, under the control of the
In addition, as described above, only the plane view image of a certain region of interest selected from the user, not selected from the entire image photographed through the wide
According to another embodiment of the present invention, the
Meanwhile, the movement information tracked by the
At least a part of the face recognition method according to the present invention may be stored in a computer-readable recording medium. The computer-readable recording medium may be a ROM, a RAM, a CD -ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet).
The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional programs, codes and code segments for implementing the above method can be easily inferred by programmers of the technical field to which the present invention belongs.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.
Claims (17)
A face recognition unit for comparing one or more face images extracted by the image processing unit with registered images stored in a database and outputting recognition results; And
And an image tracking unit for tracking movement of one or more face images extracted by the image processing unit,
And movement information tracked by the image tracking unit is stored together with time information.
Wherein the conversion unit converts spherical coordinates to plane coordinates for the wide-angle image.
And processing the wide-angle image to generate a plurality of planar viewpoint images corresponding to each of the plurality of ROIs.
And a communication module for transmitting at least one planar viewpoint image selected from the plurality of planar viewpoint images to the outside.
And a memory unit for storing at least one planar viewpoint image selected from the plurality of planar viewpoint images.
And extracting a plurality of face images located at different heights within the processed image.
An area detection unit detecting a plurality of feature areas from the face image;
A normalizing unit for normalizing the face image based on the detected plurality of regions; And
And a matching determination unit for comparing the plurality of points in the normalized face image with a plurality of points of a registered image stored in the database to determine whether to match the plurality of points.
Processing a wide angle image photographed through a wide angle camera module and converting the wide angle image into a planar viewpoint image;
Extracting one or more face images from the transformed planar view image;
Recognizing a face by comparing the extracted one or more face images with registered images stored in a database; And
And tracking movement of the extracted one or more face images,
Wherein the movement information by the step of tracking movement of the extracted one or more face images is stored together with time information.
And converting the spherical coordinates to plane coordinates for the wide-angle image.
And processing the wide-angle image to generate a plurality of planar viewpoint images corresponding to each of a plurality of ROIs.
And transmitting at least one planar viewpoint image selected from the plurality of planar viewpoint images to the outside.
And storing at least one planar viewpoint image selected from the plurality of planar viewpoint images in a memory.
And extracting a plurality of face images located at different heights in the converted plane view image.
Detecting a plurality of feature regions from the face image;
Normalizing the face image based on the detected plurality of areas;
And comparing the plurality of points in the normalized face image with a plurality of points of a registered image stored in the database to determine whether or not to match the wide angle image.
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Cited By (1)
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CN110363048A (en) * | 2018-04-04 | 2019-10-22 | 阿里巴巴集团控股有限公司 | Face identification method and device |
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KR20130112273A (en) * | 2012-04-03 | 2013-10-14 | 조선대학교산학협력단 | Method and apparatus for detecting, capturing face image for face recognition |
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KR20090025647A (en) * | 2007-09-06 | 2009-03-11 | 연세대학교 산학협력단 | Non-intrusive iris image acquisition system and method thereof |
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CN110363048B (en) * | 2018-04-04 | 2020-04-24 | 阿里巴巴集团控股有限公司 | Face recognition method and device |
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