CN104408450A - Identity card identifying method, device and system - Google Patents
Identity card identifying method, device and system Download PDFInfo
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- CN104408450A CN104408450A CN201410675577.2A CN201410675577A CN104408450A CN 104408450 A CN104408450 A CN 104408450A CN 201410675577 A CN201410675577 A CN 201410675577A CN 104408450 A CN104408450 A CN 104408450A
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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
- G06V10/20—Image preprocessing
- G06V10/26—Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion
- G06V10/267—Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion by performing operations on regions, e.g. growing, shrinking or watersheds
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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
- G06V10/40—Extraction of image or video features
- G06V10/44—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
Abstract
The invention discloses an identity card identifying method, device and system. The method includes: acquiring the image of an identity card; segmenting the image of the identity card, and extracting at least one useful-information-area image; performing binarization processing on the useful-information-area images to obtain binarization images; performing character recognition on the binarization images to extract useful identity information. By the arrangement, the method has the advantages that manual intervention can be reduced, and identity card information collecting efficiency is increased.
Description
Technical field
The present invention relates to technical field of image processing, in particular to a kind of identity card recognition method, Apparatus and system.
Background technology
I.D. is the certificate for proving possessor's identity, how to authorize citizen by various countries or district government.As a kind of important proof of identification certificate, its real life citizen and work play very important effect in the middle of selecting, such as, handle household registration, marriage registration, admission citizen, obtain employment, affairs of notarizing, go to border management area, handle in application exit formalities etc. process, submit to proof of identification material to be exactly indispensable important step.
The China second-generation identity card of non-contact IC card technique is incorporated along with current China carries out in an all-round way, the identity information of citizen can be obtained in the mode of swiping the card by card-reading apparatus in some important occasion, but at some in the middle of other application scenario, owing to lacking corresponding card-reading apparatus, so that the reading for I.D. identity information is main or will make a copy of by manually carrying out and confirm, but which needs to consume more human resources, and reading efficiency is very low.And in actual mechanical process, also may be there is the problem of doing wrong to serve one's friends or relatives by manual review identity information.
Summary of the invention
OCR(Optical Character Recognition, optical character identification) technology, it waits optics input mode that various bill, newpapers and periodicals, books, manuscript and other printed matter are converted to image information mainly through scanning, and recycling character recognition technology extracts the computer input technology of useful information from image information.Typing and the processing technology field of bank money, in a large number written historical materials, archives folder, official documents and correspondence can be widely used in.
In order to solve in prior art by manual review ID (identity number) card information and the information of carrying out makes a copy of the existing problem wasted time and energy, namely the embodiment of the present invention discloses a kind of identity card recognition method based on OCR technology, Apparatus and system.
In order to reach object of the present invention, the present invention realizes by the following technical solutions:
A kind of identity card recognition method, comprising:
Obtain ID Card Image;
Image cutting process is carried out to described ID Card Image, extracts at least one useful information area image;
Binary conversion treatment is carried out to described useful information area image, obtains binary image;
Text region process is carried out to described binary image, extracts useful identity information.
Preferably, before carrying out binary conversion treatment to described useful information area image, described identity card recognition method also comprises:
Luminance proportion process is carried out to described useful information area image.
Preferably, before carrying out Text region process to described binary image, described identity card recognition method also comprises:
Image denoising process is carried out to described binary image.
A kind of I.D. recognition device, it comprises:
Acquisition module, for obtaining ID Card Image;
Cutting module, for carrying out image cutting process to described ID Card Image, extracts at least one useful information area image;
Binarization block, for carrying out binary conversion treatment to described useful information area image, obtains binary image;
Identification module, for carrying out Text region process to described binary image, extracts useful identity information.
Preferably, described I.D. recognition device also comprises:
Luminance proportion module, for carrying out luminance proportion process to described useful information area image.
Preferably, described I.D. recognition device also comprises:
Denoising module, for carrying out image denoising process to described binary image.
A kind of terminal, comprise I.D. recognition device as above, described device comprises:
Acquisition module, for obtaining ID Card Image;
Cutting module, for carrying out image cutting process to described ID Card Image, extracts at least one useful information area image;
Binarization block, for carrying out binary conversion treatment to described useful information area image, obtains binary image;
Identification module, for carrying out Text region process to described binary image, extracts useful identity information.
A kind of server, comprise I.D. recognition device as above, described device comprises:
Acquisition module, for obtaining ID Card Image;
Cutting module, for carrying out image cutting process to described ID Card Image, extracts at least one useful information area image;
Binarization block, for carrying out binary conversion treatment to described useful information area image, obtains binary image;
Identification module, for carrying out Text region process to described binary image, extracts useful identity information.
A kind of ID Card Recognition System, comprising:
Terminal, for gathering user identity card image;
Server, for obtaining ID Card Image, carries out image cutting process to described ID Card Image, extracts at least one useful information area image; Be further used for carrying out binary conversion treatment to obtain binary image to described useful information area image; And be further used for carrying out Text region process to extract useful identity information to described binary image.
A kind of ID Card Recognition System, comprising:
Terminal, for obtaining ID Card Image, carries out image cutting process to described ID Card Image, extracts at least one useful information area image; Be further used for carrying out binary conversion treatment to obtain binary image to described useful information area image; And be further used for carrying out Text region process to described binary image, to extract useful identity information and to be sent to server;
Server, for obtaining described useful identity information.
As can be seen from the technical scheme of the invention described above embodiment, the identity card recognition method that the embodiment of the present invention provides: by carrying out image cutting process, binary conversion treatment and further Text region process to the ID Card Image gathered, can automatically extract useful identity information, thus can manual intervention be reduced, improve the efficiency that ID (identity number) card information gathers.
Accompanying drawing explanation
A kind of identity card recognition method schematic flow sheet that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is ID Card Image schematic diagram in the embodiment of the present invention;
Fig. 3 for after Iamge Segmentation process being carried out to ID Card Image shown in Fig. 2 in the embodiment of the present invention, the useful information area image schematic diagram that obtains;
A kind of identity card recognition method schematic flow sheet that Fig. 4 provides for the present invention one preferred embodiment;
A kind of identity card recognition method schematic flow sheet that Fig. 5 provides for the present invention one preferred embodiment;
A kind of I.D. recognition device illustrative view of functional configuration that Fig. 6 provides for the embodiment of the present invention;
A kind of I.D. recognition device illustrative view of functional configuration that Fig. 7 provides for the present invention one preferred embodiment;
A kind of I.D. recognition device illustrative view of functional configuration that Fig. 8 provides for the present invention one preferred embodiment;
A kind of ID Card Recognition System network architecture schematic diagram that Fig. 9 provides for one embodiment of the invention;
A kind of ID Card Recognition System network architecture schematic diagram that Figure 10 provides for another embodiment of the present invention.
The realization of the object of the invention, functional characteristics and excellent effect, be described further below in conjunction with specific embodiment and accompanying drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, can better understand the present invention to make those skilled in the art and can be implemented, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 1, embodiments provide a kind of identity card recognition method, comprising:
S10, acquisition ID Card Image;
S20, image cutting process is carried out to described ID Card Image, extract at least one useful information area image;
S30, binary conversion treatment is carried out to described useful information area image, obtain binary image;
S40, Text region process is carried out to described binary image, extract useful identity information.
For described step S10, in the present embodiment, can by the ID Card Image of user by the camera collection user of mobile terminal, also can gather user identity by scanning device or its photographing device (as camera etc.) and demonstrate,prove image, certainly, described ID Card Image also can obtain from the storage medium being pre-stored with user identity card image information, and in the specific implementation, the present invention does not limit the embodiment obtaining described ID Card Image.
Such as, in one embodiment, when user passes through the ID Card Image of the camera collection user of mobile terminal, the image display area of described mobile terminal provides a calibration rectangle frame, to make user when shooting ID Card Image, can the convenient card of captured identity effectively image.
After getting ID Card Image, in one preferably embodiment, the dimension of picture masterplate according to presetting also is needed to carry out cutting adjustment to described ID Card Image.
For described step S20, for ID Card Image, its region recording useful information is fixing, in order to reduce the process to garbage, avoid carrying out in processing procedure, occurring the too much process wasting of resources at follow-up image, therefore in the present embodiment, need to carry out image cutting process to described ID Card Image
Shown in figure 2, for I.D. 100, its visual useful information generally includes: name, sex, national, birth, address, the information such as citizenship number and user picture, identify in the middle of application at the user identity card based on Text region, useful information also needs to get rid of user picture, therefore, in the present embodiment, with reference to figure 3, image cutting process is carried out to described ID Card Image, comprise to extract at least one useful information area image: name information area image 200, sex and Folk Information area image 201, birth information area image 203, certificate address information area image 204 and citizenship number information area image 205.
In the present embodiment, can also perform for described at least one useful information area image and integrate process, be integrated into a width useful information area image by described name information area image 200, sex and Folk Information area image 201, birth information area image 203, certificate address information area image 204 and citizenship number information area image 205, and follow-up image procossing is continued to this width useful information area image.
In some other embodiment, can process respectively described name information area image 200, sex and Folk Information area image 201, birth information area image 203, certificate address information area image 204 and citizenship number information area image 205, again the useful identity information finally extracted is carried out unifying to arrange, to form the full identity information of relative users after completing all treatment steps.
For described step S30, binary conversion treatment is carried out to described information area image, in overall binary conversion treatment process, global threshold T specifically can be arranged according to actual conditions, the pixel value of the pixel being greater than threshold value T is set as white (or black), the pixel value being less than the pixel of threshold value T is set as black (or white), to obtain binary image.
For described step S40, adopt known Text region algorithm to carry out Text region process to described binary image, extract useful identity information.Due to described binary picture similarly be by former full identity card image through image cutting, obtain useful information area image after, the image that obtains after binary conversion treatment again, therefore, in the present embodiment, when Text region process is carried out to described binary image, without the need to processing other useless parts (such as the nonuseable part of I.D. except character area), decrease the waste of process resource.
The useful identity information of described final extraction, in certain embodiment, can be sent to concrete third-party application system by it by network by the terminal of user (as portable mobile terminal or PC), to make its use of carrying out concrete authentication or other purposes; At some in other embodiment, the main body performing described method is the third-party application system of network side, it obtains by open interface the ID Card Image that multiple user uploads, and adopt described identity card recognition method to extract corresponding useful identity information thereon, with final use of carrying out corresponding authentication according to this useful identity information, and/or send this useful identity information to corresponding user terminal.
Preferably, shown in figure 4, before carrying out binary conversion treatment to described useful information area image, described identity card recognition method also comprises:
S50, luminance proportion process is carried out to described useful information area image.
Preferably, shown in figure 5, before carrying out Text region process to described binary image, described identity card recognition method also comprises:
S60, image denoising process is carried out to described binary image.
Correspondingly, the embodiment of the present invention additionally provides a kind of I.D. recognition device, and shown in figure 6, it comprises:
Acquisition module 10, for obtaining ID Card Image;
Cutting module 20, for carrying out image cutting process to described ID Card Image, extracts at least one useful information area image;
Binarization block 30, for carrying out binary conversion treatment to described useful information area image, obtains binary image;
Identification module 40, for carrying out Text region process to described binary image, extracts useful identity information.
Described I.D. recognition device can be deployed in end side (such as mobile terminal or PC), also can be deployed in server side.
For described acquisition module 10, its ID Card Image obtained directly can be gathered by the camera of mobile terminal by user, also can be gathered by scanning device or its photographing device (as camera etc.), certainly, also can obtain from the storage medium being pre-stored with user identity card image information, in the specific implementation, the present invention does not limit the embodiment obtaining described ID Card Image.
In one embodiment, when user passes through the ID Card Image of the camera collection user of mobile terminal, the image display area of described mobile terminal provides a calibration rectangle frame, to make user when shooting ID Card Image, can the convenient card of captured identity effectively image.
After described acquisition module 10 gets ID Card Image, in one preferably embodiment, the dimension of picture masterplate according to presetting also is needed to carry out cutting adjustment to described ID Card Image.
For described cutting module 20, for ID Card Image, its region recording useful information is fixing, in order to reduce the process to garbage, avoid carrying out in processing procedure, occurring the too much process wasting of resources at follow-up image, therefore in the present embodiment, described cutting module 20 needs to carry out image cutting process to described ID Card Image.
Continue with reference to shown in figure 2, for I.D. 100, its visual useful information generally includes: name, sex, national, birth, address, the information such as citizenship number and user picture, identify in the middle of application at the user identity card based on Text region, useful information also needs to get rid of user picture, therefore, in the present embodiment, continue with reference to figure 3, image cutting process is carried out to described ID Card Image, comprise to extract at least one useful information area image: name information area image 200, sex and Folk Information area image 201, birth information area image 203, certificate address information area image 204 and citizenship number information area image 205.
In the present embodiment, described cutting module 20 can also perform for described at least one useful information area image and integrate process, be integrated into a width useful information area image by described name information area image 200, sex and Folk Information area image 201, birth information area image 203, certificate address information area image 204 and citizenship number information area image 205, and follow-up image procossing is continued to this width useful information area image.
In some other embodiment, follow-up binarization block 30 and identification module 40 can also process respectively to described name information area image 200, sex and Folk Information area image 201, birth information area image 203, certificate address information area image 204 and citizenship number information area image 205, again the useful identity information finally extracted is carried out unifying to arrange, to form the full identity information of relative users after completing all treatment steps.
Described binarization block 30 carries out binary conversion treatment to described useful information area image, in overall binary conversion treatment process, global threshold T specifically can be arranged according to actual conditions, the pixel value of the pixel being greater than threshold value T is set as white (or black), the pixel value being less than the pixel of threshold value T is set as black (or white), to obtain binary image.
Described identification module 40 adopts known Text region algorithm to carry out Text region process to described binary image, extracts useful identity information.Due to described binary picture similarly be by former full identity card image through image cutting, obtain useful information area image after, the image that obtains after binary conversion treatment again, therefore, in the present embodiment, when Text region process is carried out to described binary image, without the need to processing other useless parts (such as the nonuseable part of I.D. except character area), decrease the waste of process resource.
The useful identity information that described identification module 40 finally extracts, in certain embodiment, by the terminal of user (as portable mobile terminal or PC), it can be sent to concrete third-party application system by network, to make its use of carrying out concrete authentication or other purposes; At some in other embodiment, the main body performing described method is the third-party application system of network side, it obtains by open interface the ID Card Image that multiple user uploads, and extract corresponding useful identity information by described I.D. recognition device, with final use of carrying out corresponding authentication according to this useful identity information, and/or send this useful identity information to corresponding user terminal.
Preferably, shown in figure 7, described I.D. recognition device also comprises:
Luminance proportion module 50, for carrying out luminance proportion process to described useful information area image.
Wherein, described luminance proportion module 50 adopts known luminance proportion Processing Algorithm to carry out luminance proportion process to described useful information area image.
Preferably, shown in figure 8, described I.D. recognition device also comprises:
Denoising module 60, for carrying out image denoising process to described binary image.
Wherein, described denoising module 60 adopts known image denoising Processing Algorithm to carry out image denoising process to described binary image.
Correspondingly, the embodiment of the present invention additionally provides a kind of terminal, and described terminal can be mobile terminal, such as smart mobile phone, notebook computer, PDA etc., also can be PC, described terminal comprises I.D. recognition device as above, with reference to figure 6, described device comprises:
Acquisition module 10, for obtaining ID Card Image;
Cutting module 20, for carrying out image cutting process to described ID Card Image, extracts at least one useful information area image;
Binarization block 30, for carrying out binary conversion treatment to described useful information area image, obtains binary image;
Identification module 40, for carrying out Text region process to described binary image, extracts useful identity information.
Specific descriptions for described I.D. recognition device referring to above, can repeat no more here.
According to the present invention, also correspondingly disclose a kind of server, comprise I.D. recognition device as above, for receiving the ID Card Image of user from user's side joint or directly obtaining the ID Card Image of user from local data base, and according to described I.D. recognition device, a series of identifying processing is carried out to described ID Card Image, obtain corresponding subscriber identity information, continue referring to Fig. 6, described device comprises:
Acquisition module 10, for obtaining ID Card Image;
Cutting module 20, for carrying out image cutting process to described ID Card Image, extracts at least one useful information area image;
Binarization block 30, for carrying out binary conversion treatment to described useful information area image, obtains binary image;
Identification module 40, for carrying out Text region process to described binary image, extracts useful identity information.
Similarly, the specific descriptions for described I.D. recognition device referring to above, can repeat no more here.
The embodiment of the present invention additionally provides a kind of ID Card Recognition System, and referring to Fig. 9, described system comprises:
Terminal, for gathering user identity card image;
Server, for obtaining ID Card Image, carries out image cutting process to described ID Card Image, extracts at least one useful information area image; Be further used for carrying out binary conversion treatment to obtain binary image to described useful information area image; And be further used for carrying out Text region process to extract useful identity information to described binary image.
In this embodiment, described server is used for centralized I.D. identification, in the middle of practical application, it outwards provides API(Application Programming Interface, application programming interface), mobile terminal, PC is made all by network, ID Card Image to be provided to this server, server is after focusing on these pending ID Card Images, final useful identity information can be returned to corresponding terminal, the useful identity information that also can identify these carries out other use, as identifying user identity.
After described server gets user identity card image, the embodiment that described user identity card image carries out a series of images process referring to above, can be repeated no more here.
In another embodiment, referring to Figure 10, a kind of ID Card Recognition System provided by the invention, comprising:
Terminal, for obtaining ID Card Image, carries out image cutting process to described ID Card Image, extracts at least one useful information area image; Be further used for carrying out binary conversion treatment to obtain binary image to described useful information area image; And be further used for carrying out Text region process to described binary image, to extract useful identity information and to be sent to server;
Server, for obtaining described useful identity information.
In this embodiment, the main body implementing I.D. identification is user terminal, and described terminal includes but not limited to mobile terminal, PC etc.Described server is used for the useful identity information obtaining relative users from terminal, and carries out the purposes of such as authentication further according to this useful identity information.
Described terminal referring to above, can repeat no more here to the embodiment that described user identity card image carries out a series of images process.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. an identity card recognition method, is characterized in that, comprising: obtain ID Card Image; Image cutting process is carried out to described ID Card Image, extracts at least one useful information area image; Binary conversion treatment is carried out to described useful information area image, obtains binary image; Text region process is carried out to described binary image, extracts useful identity information.
2. identity card recognition method as claimed in claim 1, is characterized in that, before carrying out binary conversion treatment to described useful information area image, also comprise: carry out luminance proportion process to described useful information area image.
3. identity card recognition method as claimed in claim 1, is characterized in that, before carrying out Text region process to described binary image, also comprise: carry out image denoising process to described binary image.
4. an I.D. recognition device, is characterized in that, comprising: acquisition module, for obtaining ID Card Image; Cutting module, for carrying out image cutting process to described ID Card Image, extracts at least one useful information area image; Binarization block, for carrying out binary conversion treatment to described useful information area image, obtains binary image; Identification module, for carrying out Text region process to described binary image, extracts useful identity information.
5. I.D. recognition device as claimed in claim 4, is characterized in that, also comprise: luminance proportion module, for carrying out luminance proportion process to described useful information area image.
6. I.D. recognition device as claimed in claim 4, is characterized in that, also comprise: denoising module, for carrying out image denoising process to described binary image.
7. a terminal, is characterized in that, comprises the I.D. recognition device as described in any one of claim 4-6.
8. a server, is characterized in that, comprises the I.D. recognition device as described in any one of claim 4-6.
9. an ID Card Recognition System, is characterized in that, comprising: terminal, for gathering user identity card image; Server, for obtaining ID Card Image, carries out image cutting process to described ID Card Image, extracts at least one useful information area image; Be further used for carrying out binary conversion treatment to obtain binary image to described useful information area image; And be further used for carrying out Text region process to extract useful identity information to described binary image.
10. an ID Card Recognition System, is characterized in that, comprising: terminal, for obtaining ID Card Image, carries out image cutting process to described ID Card Image, extracts at least one useful information area image; Be further used for carrying out binary conversion treatment to obtain binary image to described useful information area image; And be further used for carrying out Text region process to described binary image, to extract useful identity information and to be sent to server;
Server, for obtaining described useful identity information.
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