CN103593642A - Card-information acquisition method and system - Google Patents
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Abstract
The scheme relates to a card-information acquisition system and method. The system includes an image acquisition module (201) for acquiring a card image; a database (205) for prestoring card information which at least includes the type of a card, image features and text composition information; an image analyzing and identifying module (203) for extracting image features from the acquired card image and comparing the image features with the image features in the card information prestored by the database (205) so as to determine the type of the card; a character identifying module (207) for extracting card information, which is corresponding to the type and includes the text composition information, from the database (205) according to the determined type of the card so as to locate character areas and segmented characters so that characters on the acquired card image are identified. The method includes a processing process of the system. In the card-information acquisition system and method, the card information of a card is used to establish the database and valid image features are used to identify the type of the card so that extraction performance and efficiency of information areas of the card are improved and automatic and rapid card-information input through use of a mobile terminal is facilitated for a user.
Description
Technical field
The present invention relates to the technical field of obtaining information on mobile terminal, relate in particular on a kind of mobile terminal and utilize image recognition to obtain the method and system of card image.
Background technology
Along with the fast development of mobile terminal, the demand paying on mobile terminal is more and more.Great majority and the relevant business of payment all need user to input the information of its card, as the information such as card number of credit card/bank card.Conventionally obtain these information ways and have two kinds: a kind of is manual input, do so often easily input error, complicated operation can cause puzzlement to user.Another kind is the mode of the OCR (optical character identification) based on traditional, by camera, takes card, then locates area-of-interest (as account information part), then carries out cutting apart and identifying of character.
The card number information of input card on mobile terminal (such as bank card: credit card, debit card etc., or the purchase card of cash equivalent, etc.) is the very inconvenient thing of part.For example: the words input mode based on traditional OCR, as shown in Figure 1, the method for utilizing mobile phone automatic input word, image and processing thereof proposing in prior art.Mobile phone comprises camera and the image pickup signal output terminal being connected with mobile phone central processing unit; Under the control of total control module 110, webcam driver module 101 is taken the word on business card, image etc. after imaging, by the space of a whole page, process and strengthen module 102, intelligent printed page analysis module 103, character recognition module 104, post-processing module 105 sequential workings, image pickup signal is carried out pre-service and strengthens processing, be partitioned into character area and image-region, the character of character area is identified and classified, classification results and figure compression result are stored in to database module 106; The data exchange module 107 of mobile phone by local network or telenet connect realize and computer between or and other mobile terminals between exchanges data, driver module 108 drives and shows, 109 pairs of card informations of choosing of associated application module, carry out associated application.Wherein, the image pickup signal output terminal being connected with mobile terminal central processing unit is owing to not utilizing the unusual prior imformation such as helpful type of card of automatic input, its method is easy to be subject to the impact (especially all kinds of different card) of card background, texture, relief pattern of panoramic variety classes, pattern etc. etc., the failure that easily causes word content to extract and identify, and need to do all character areas of full figure scanning recognition, the efficiency of operation is also lower.
Summary of the invention
Defect for above-mentioned prior art, the technical problem to be solved in the present invention is to provide card information acquisition method and the system on a kind of mobile terminal, it is based on image recognition technology, all kinds of cards of quick obtaining (card) information effectively, type of card prior imformation utilization based on database is carried out image recognition and analysis to the image obtaining, the technology such as character recognition, carry out fast the information identifications such as card account zone location and account word, thereby effectively improve efficiency and the success ratio of character area location under complex pattern background, and, recognition result is inserted to account input frame automatically, completing account information inputs automatically, make can automatically obtain easily card image on mobile terminal.
Card image on a kind of mobile terminal provided by the invention is obtained system, comprising: image collection module, for obtaining card graphic; Database, at least comprises type, the characteristics of image of card, the card information of text composition information for storing; Graphical analysis and identification module, extract characteristics of image for the card graphic obtaining from image collection module, and the characteristics of image of the described card information that extracted characteristics of image and database are prestored compares, to determine the type of card; Character recognition module, be used for according to the type of definite card, from database (205), extract the card information that comprise text composition information corresponding with described type, with location character region and separating character, thereby the character on obtained card graphic is identified.
Card information acquisition method on a kind of mobile terminal of the system of corresponding this programme, comprising: build database steps, build the database of the card information of the type that at least comprises card for prestoring, characteristics of image, text composition information; Obtaining step, obtains card graphic; Characteristic extraction step is extracted characteristics of image from obtained card graphic; Comparison step, by the characteristics of image comparison of the described card information prestoring in the characteristics of image of extraction and database, to determine the type of card; Character recognition step according to the type of definite card, extracts the card information that comprise text composition information corresponding with described type, with location character region and separating character, so that the character on the card graphic being obtained is identified from database.
In the present invention, by image recognition mode, build in advance the characteristics of image storehouse of card, simplify word area detection and identification difficulty, solved a difficult problem for character area location, realize and on mobile terminal, carry out effectively easily card (card) acquisition of information, promoted efficiency.Method and system of the present invention makes full use of the card image of card, building database, by effective characteristics of image identification type of card, and then promoted performance and the efficiency of card image extracted region, for user utilizes mobile terminal to carry out fast automatic card information input, provided convenience.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that the existing card image based on OCR is obtained technology.
Fig. 2 is the structured flowchart of the specific embodiment of the invention.
Fig. 3 is the process flow diagram of the specific embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The specific embodiment of the invention is the method for the quick obtaining card information based on image recognition technology: by mobile terminal device with camera take the card will obtain card information, first by image recognition technology, judge type of card, then the information based on the type card in database is carried out printed page analysis to it, thereby carries out fast the location in account region in card.The method can effectively improve efficiency and the success ratio of character area location under complex pattern background; Combining image analysis and character recognition technologies on the basis of successfully locating payment account character area, carry out the identification of the information such as account word; Finally, the result of identification is automatically inserted in application program and needed to fill out in the input frame of accounts information, to realize automatic account information input.
The system architecture diagram that obtains card image on mobile terminal of the present invention as shown in Figure 2.This system comprises that the image on mobile terminal obtains module 201, graphical analysis and identification module 203, database 205, character recognition module 207 and data exchange module 209, etc.
Image collection module 201: be included in mobile device (terminal) or other mobile platforms image collecting device arranging as upper in mobile phone, PDA, panel computer and other similar handheld devices etc. as the first-class and shooting driver module 211 of making a video recording.Image collection module 201 as the card that contains account information (bank card, credit card etc.) card, obtains relevant view data/image information for the card that drives cameras to take by this shooting driver module 211 will to use.
The database 205 building: memory card information (as data such as card informations: at least comprise Card Type, text composition information, characteristics of image etc.), it also comprises two aspects, first, card image feature database 213, the characteristics of image corresponding with the type of card in card information prestores, to distinguish the type of different cards, it is for distinguishing the type of different cards, wherein, characteristics of image includes but not limited to feature histogram extracting after color, texture, local binary feature LBP, the rich Gabor wave filter of lid are to image filtering etc.; Second, card page-layout base 215, the text composition information corresponding with the type of card in card information prestores, for distinguishing the format corresponding with the type of blocking, it is for recording the text composition information that includes but not limited to corresponding card, as the position at card account character area place, font, account character arrangements mode etc.
Graphical analysis and identification module 203: for the image that image collection module 201 is obtained, carry out image characteristics extraction, and the characteristics of image in the card image feature database 213 of setting up in the characteristics of image of extraction and database 205 is contrasted, by characteristic similarity comparison, obtain card image that image collection module 201 collection the obtains best matching result in database 205, to determine the type of this card.
Card printed page analysis and character area locating module 217, by graphical analysis and identification module 203, process the type of card acquiring, the information of the card that further extracts the type from database 205 in card format data storehouse 215, these information comprise the position, font, character, character arrangements mode at the card character area place of the type etc.Utilize these information as template, on the image obtaining in image collection module 201, the card number character area of card (card) is positioned and Character segmentation.
Below will be according to Fig. 3, the method flow that the card image on mobile terminal is obtained, is described.In the step of the method, no longer the function of the modules in system architecture (device) is repeated in this description.
Step 301 (structure database steps), builds card image database 205, as the database of card information (1) card image feature database 213 and (2) card page-layout base 215.Card image feature database is distinguished different type of card, and wherein, characteristics of image includes but not limited to feature histogram extracting after color, texture, local binary feature LBP, the rich Gabor wave filter of lid are to image filtering etc.Card page-layout base records corresponding card text composition information, such as for card, is concerned about payment accounts character area position, font, account character content, account character arrangements mode etc.Thus, be provided with the very helpful card prior imformation of automatic input (at least containing type, typesetting, characteristics of image etc.), by aspect ratio, to obtaining type, can quick and precisely find corresponding card account region, thereby avoid the interference such as all kinds of card backgrounds (image or word) and cause word content to extract and identification often occurs unsuccessfully or wrong situation.Further, this database builds, can also comprise intelligent identification and renewal, as in advance card image not being arranged on to the new card in database, can be by its characteristics of image and format feature in the time can not matching the card of having stored, two category informations of new card are joined respectively in database, more new database (database is to expand renewal).Image acquisition step 302 (acquisition step), drives the image collecting device on mobile terminal as first-class in made a video recording by the driver module 211 in image collection module 201, takes the card (card) that contains account information, obtains relevant view data.
Step 303 (characteristic extraction step and comparison step), by graphical analysis and identification module 203, the image obtaining in image acquisition step 302 is carried out to the extraction of characteristics of image, and the characteristics of image in the card image feature database 213 of setting up in the characteristics of image of extraction and step 301 is compared, utilize characteristic similarity relatively to obtain obtaining obtaining best matching result in database 205 of the image of card (in feature database 213 to result) in step 302, thereby determine that what type this card is.Utilize this class prior imformation of type of card, can prevent from knowing make mistakes (be that it has simplified character area positioning difficulty, can greatly improve the accuracy of follow-up word identification).
Step 305 (character recognition step), utilize printed page analysis and the character area locating module 217 of card to process, the type of card information obtaining by step 303, from database 205, extract corresponding with the type card, the information of this card in card page-layout base 215, these information comprise class this type card character area position, font, character arrangements mode etc., by these information as template data, on the image obtaining in image acquisition step 302, the card number character area of card (card) is positioned and Character segmentation.(that is, determined these prior imformations of type of card, making, when printed page analysis and locating area, does not need all character areas of full figure scanning recognition, and location, improves recognition efficiency and recognition accuracy fast).
Step 305 (character recognition step), the card character font information of utilizing word identification module 219 to obtain, adopt the recognition engine text of corresponding font, character to character area is identified, the result of identification is arranged, obtain a character string information, character string as corresponding in the account information with card, for next step account information automatic input (input).
Step 306 (response of step), utilize the automatic input module 211 of the information such as card account, by the character string obtaining in step 305, by modes such as message transfer mechanisms, be transferred in the application module that need to call card image (as card account information), as the application module of Local or Remote (application program), account input frame etc. is ejected in operation, finally obtains the realization of automatic information typing and subsequent treatment.
From the system of Fig. 2 and the method for Fig. 3, by mobile terminal quick obtaining card information, mainly utilized the method for building database, as the combination of the card page-layout base of characteristics of image storehouse and card, thereby according to the information in the database of setting up, in the card pattern of complicated card, carry out quick location, character area analysis and the word identification of account character area, make user can utilize mobile terminal to carry out fast card information and obtain.
Each embodiment in this instructions is general, and the mode of going forward one by one that adopts is described, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
The application can describe in the general context of the computer executable instructions of being carried out by computing machine, for example program module or unit.Usually, program module or unit can comprise the routine carrying out particular task or realize particular abstract data type, program, object, assembly, data structure etc.In general, program module or unit can be realized by software, hardware or both combinations.Also can in distributed computing environment, put into practice the application, in these distributed computing environment, by the teleprocessing equipment being connected by communication network, be executed the task.In distributed computing environment, program module or unit can be arranged in the local and remote computer-readable storage medium that comprises memory device.
Finally, also it should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, commodity or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, commodity or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, commodity or the equipment that comprises described key element and also have other identical element.
Applied specific case herein and the application's principle and embodiment have been carried out to lock stated, the explanation of above embodiment is just for helping to understand the application's method and main thought thereof; Meanwhile, for one of ordinary skill in the art, the thought according to the application, all will change in specific embodiments and applications, and in sum, this description should not be construed as the restriction to the application.
Claims (16)
1. the system that card information obtains, is characterized in that, comprising:
Image collection module (201), for obtaining card graphic;
Database (205), at least comprises type, the characteristics of image of card, the card information of text composition information for prestoring;
Graphical analysis and identification module (203), for the card graphic obtaining from image collection module (201), extract characteristics of image, and the characteristics of image of the described card information that extracted characteristics of image and database (205) are prestored compares, to determine the type of card;
Character recognition module (207), be used for according to the type of definite card, from database (205), extract the card information that comprise text composition information corresponding with described type, with location character region and separating character, thereby the character on obtained card graphic is identified.
2. the system as claimed in claim 1, is characterized in that, further comprises:
Data exchange module (209), for the card character typing request of response application program, the character that input identifies automatically.
3. system as claimed in claim 1 or 2, is characterized in that, database (205) also comprises:
Card image feature database (213), in the card information that prestores with the characteristics of image corresponding to type of card, to distinguish the type of different cards;
Card page-layout base (215), in the card information that prestores with the text composition information corresponding to type of card, for distinguishing the format corresponding with the type of blocking.
4. system as claimed in claim 3, is characterized in that:
The characteristics of image of card comprises: the feature histogram that color, texture, local binary feature LBP, the rich Gabor wave filter of lid extract after to image filtering;
The text composition information of card comprises: the position at the character area place of card, font, account character arrangements mode.
5. system as claimed in claim 3, is characterized in that, graphical analysis and identification module (203) also for:
The characteristics of image extracting and the characteristics of image in card image feature database (213) are contrasted, by characteristic similarity comparison, thus the best matching result of the card image that obtains obtaining in database (205), to determine the type of described card.
6. system as claimed in claim 3, is characterized in that, character recognition module (207) also comprises:
Card printed page analysis and character area locating module (217), by the type of graphical analysis and the definite card of identification module (203), from database (205), extract the text composition information in card format data storehouse (215) that is stuck in of the described type of determining, using text composition information as template, on obtained card graphic, card character area is positioned and Character segmentation;
Word identification module (219), utilizes the text composition information obtaining, and the character of the character area being partitioned into is identified, and arranged the result of identification, is blocked the character string that needs input.
7. system as claimed in claim 6, is characterized in that, word identification module (219) also comprises:
Utilize the font information obtaining in text composition information to identify the character of the character area being partitioned into, wherein, character recognition adopts template matches mode or statistics training recognition method, and described character string is the account information of card.
8. system as claimed in claim 7, is characterized in that, data exchange module (209) also comprises:
Automatic input module (221), for the request of response application program, the character string that will obtain from word identification module (219), by message transfer mechanism, send the application program of request call card information to, to complete automatic information typing and subsequent treatment.
9. a card information acquisition methods, is characterized in that, comprising:
Build database steps, build the database (205) of the card information of the type that at least comprises card for prestoring, characteristics of image, text composition information;
Obtaining step, obtains card graphic;
Characteristic extraction step is extracted characteristics of image from obtained card graphic;
Comparison step, by the characteristics of image comparison of the described card information prestoring in the characteristics of image extracting and database (205), to determine the type of card;
Character recognition step according to the type of definite card, extracts the card information that comprise text composition information corresponding with described type, with location character region and separating character, so that the character on the card graphic being obtained is identified from database (205).
10. method as claimed in claim 9, is characterized in that, further comprises:
Response of step, the card character typing request of response application program, the described character that input identifies automatically.
11. methods as described in claim 9 or 10, is characterized in that, the described database (205) of structure also comprises:
Card image feature database (213), in the card information that prestores with the characteristics of image corresponding to type of card, to distinguish the type of different cards;
Card page-layout base (215), the text composition information of the type corresponding with card in the card information that prestores, for distinguishing the format corresponding with the type of blocking.
12. methods as claimed in claim 11, is characterized in that:
The characteristics of image of card comprises: the feature histogram that color, texture, local binary feature LBP, the rich Gabor wave filter of lid extract after to image filtering;
The text composition information of card comprises: the position at the character area place of card, font, account character arrangements mode.
13. methods as claimed in claim 11, is characterized in that, comparison step also comprises:
The characteristics of image extracting and the characteristics of image in card image feature database (213) are compared, utilize image that characteristic similarity relatively obtains the card that the gathers best matching result in database (205), thereby determine the type of the card of collection.
14. methods as claimed in claim 11, is characterized in that, character recognition step also comprises:
According to the type of the card obtaining, from database (205), extract the text composition information in card format data storehouse (215) that is stuck in of the described type of determining, using text composition information as template, on obtained card graphic, card character area is positioned and Character segmentation;
Utilize the text composition information obtaining, the character of the character area being partitioned into is identified, and arrange the result of identification, blocked the character string that needs input.
15. methods as claimed in claim 14, is characterized in that, in character recognition step, the character on the card graphic gathering are also identified and are comprised:
Utilize the font information obtaining in text composition information to identify the character of the character area being partitioned into, wherein, character recognition adopts template matches mode or statistics training recognition method, and described character string is the account information of card.
16. methods as claimed in claim 14, is characterized in that, in response of step, the described character of input identification also comprises automatically:
By the character string obtaining, by message transfer mechanism, send the application program of request call card information to, to complete automatic information typing and subsequent treatment.
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