CN100570632C - The information identifying method of machine-readable information card or machine-readable test paper - Google Patents
The information identifying method of machine-readable information card or machine-readable test paper Download PDFInfo
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- CN100570632C CN100570632C CNB2006101298121A CN200610129812A CN100570632C CN 100570632 C CN100570632 C CN 100570632C CN B2006101298121 A CNB2006101298121 A CN B2006101298121A CN 200610129812 A CN200610129812 A CN 200610129812A CN 100570632 C CN100570632 C CN 100570632C
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Abstract
The present invention relates to the information identifying method of a kind of machine-readable information card or machine-readable test paper, machine-readable information card or machine-readable objective test answer paper are provided with the coordinate mark, may further comprise the steps: according to release option or the selected symbol that adopts of paper option, make the electronic stencil of release or paper option, be stored in the computing machine; Coordinate label creating coordinate electroactive marker subtemplate according to release or paper is stored in the computing machine; By the digital image of optical image information digital switching facility Information Monitoring card or paper, and be stored in the computing machine; According to the electronic stencil of the coordinate mark of release or paper, determine the coordinate in the respective option zone on the digital image, the digital image in the respective option zone is carried out symbolic feature extract, obtain symbolic information; The symbolic information in the respective option zone is compared the expressed answering information of symbolic information in identification the respective option zone with the electronic stencil of release option respectively.Adopt method provided by the invention, not only can discern the release of traditional employing full-filling block method answer, can also discern and adopt setting-out to fill out the novel information card of choosing method, and make things convenient for answer, reduced mistake and answered rate and machine recognition error rate.
Description
Technical field
The present invention relates to the information identifying method of a kind of machine-readable information card or machine-readable objective test answer paper.
Background technology
Optical mark reader (being called for short OMR) is a kind of quick recording device of computing machine.It integrates machine, light, power technology, is used widely in standardization examination and various statistics with its quick, reliable performance.OMR comes across the sixties the earliest, now this system be widely used at home and abroad that the examinee gos over examination papers, marks, information processing system such as statistics even horse racing.
Optical character reader (OCR) is to utilize photoelectricity transformation principle the optical information symbol transition on the release of regulation to be become the device of the treatable electric signal of computing machine.Release is the papery card normally, some determine that the position is printed on rectangle or the circle marker district that is coated with write information on the paper, to after some logo area blackings, photoelectric conversion part just can be discerned these information by the reflective or delivery capabilities of card, and is converted into electric signal with pencil etc.
Use OMR that the mode that release carries out optical identification is had following defective:
A, high to the printing precision requirement of release is because traditional OMR machine is located by the trimming;
B, the half-tone information of only getting cog region are selected, for the stain on the release or clerical mistake even wiping change that the residual vestige in back all has a misidentification may, therefore can not reflect examinee's answer ground actual conditions sometimes truly, for example: certain multiple-choice question has four option A/B/C/D, the examinee is 90% and just drawn a line (may be that examinee's clerical mistake also may be other stains) in the C answer in full-filling ground density on the B, and the result but is that the answer recognition result of this topic is: BC;
C, recognition result is lacked the verification means:
D, do not have former figure information, find that mistake can only take out former card verification, very inconvenience.
The use high speed scanner that later stage occurs carries out the digital conversion of image to release, and the release image is carried out option area being carried out after the coordinate setting method of density and gray scale identification, this method has certain progress than optical character reader (OCR), but owing to be the identification of option area being carried out density and gray scale, so can only discern the release of full-filling block, can not discern the novel information card that adopts setting-out to fill out choosing method, and to wiping the possibility that the option of correcting one's mistakes still exists mistake to discern on the full-filling answer sheet.
The inventor proposes a kind of novel information card that adopts setting-out to fill out choosing method in another patented claim, and proposes a kind of machine-readable test paper that adopts setting-out to fill out choosing method.This kind machine-readable test paper, paper be printed with on it objective test and with the examination question corresponding option, in each option area, be printed with a plurality of points, many colored line segments or colored curve that the position is determined, when being used for answer person option being selected, point and point are carried out line or colored line segment or colored curve described the selected machine-readable symbol of formation option.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of information identifying method that is applicable to machine-readable information card and above-mentioned machine-readable test paper is proposed, utilize this recognition methods, can set up and store the digital image of every release or the former figure of machine-readable test paper, can realize the coordinate setting of release or paper digital image, can obtain the information of more information card or paper option area, realize more accurate information Recognition.Adopt method provided by the invention, not only can discern the release of traditional employing full-filling block method answer, can also discern the novel information card that adopts setting-out to fill out choosing method.
For this reason, the present invention adopts following technical scheme:
The information identifying method of a kind of machine-readable information card or paper, machine-readable information card or paper are provided with the coordinate mark, may further comprise the steps:
(1) according to release option or the selected symbol that adopts of paper option, make the electronic stencil of release or paper option, be stored in the computing machine;
(2) according to the coordinate label creating coordinate electroactive marker subtemplate of release or paper, be stored in the computing machine;
(3) with the cached location information in the respective option zone of release or paper in computing machine.
(4) pass through the digital image of optical image information digital switching facility Information Monitoring card or paper, and be stored in the computing machine;
(5) according to the electronic stencil of the coordinate mark of release or paper and the positional information in the respective option zone, determine the coordinate in the respective option zone on the digital image,
(6) digital image to the respective option zone carries out the symbolic feature extraction, obtains symbolic information;
(7) symbolic information in the respective option zone is compared the expressed answering information of symbolic information in identification the respective option zone with the electronic stencil of release option respectively.
The information identifying method of machine-readable information card of the present invention or paper, in step (1), preferably also do not select or choose and be modified as the distinct symbols of not selecting then but also being chosen again, make the electronics masterplate of release or paper option being modified to not only after choosing.
Release that information identifying method is discerned or paper can be for being printed with the definite a plurality of points in position or the release or the paper of many colored line segments or colored curve in the respective option zone.
Above-mentioned release or the selected symbol of paper option are the part or all of lines by between points, or part or all of colored line segment or colored curve are described resultant symbol.
Being modified to not only after release or paper option are selected and not selecting or choose and be modified as the symbol of not selecting then but also being chosen again is part or all of line by between points line, or part or all of colored line segment or colored curve described resulting symbol, this symbol is different from the selected symbol of the described option of claim 3.
Beneficial effect of the present invention:
1, the print request to release is low, no longer relies on the location, trimming, and to framing, as long as printing standard;
2, adopt image recognition technology, obtained more identifying information.The gray scale and the density information that carry out full-filling with the part or all of zone that prior art can only be identified in option are different, and the present invention can also discern the release that utilizes setting-out to carry out answer;
3, it is more accurate than simple gray scale and density identification the identification of the symbol that the card mode produces to be filled out in setting-out etc., and anti-interference is stronger, more can really reflect the person's of filling in true intention.
4, image typing instrument variation is as long as the optical imagery digitizer with release or paper image digitazation and typing computer of energy structure complete display all can.
5, can call former figure contrast during verification.
Description of drawings
Fig. 1 release of the present invention or paper recognition methods process flow diagram;
Fig. 2-7 is respectively the figure that certain option of adopting release that the present invention can discern or paper is printed, and the example of the symbol that is generated on this option of release or paper after the answer.(a) of each figure is blank option, (b) is the option of choosing, and (c) serving as reasons to choose changes unselected option into, (d) serves as reasons to choose to change into and does not select, and changes the option of choosing again into;
Fig. 8 release or paper option electronic stencil are for example.
Fig. 9 and Figure 10 are respectively the examination question of machine-readable test paper of the present invention and the embodiment of option thereof.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
The present invention is release or the paper recognition methods that has proposed under the proven technique background in image recognition technology, it is following several to realize that software and hardware of the present invention comprises: digital camera head, optical imagery scanner etc. carries out the equipment of digital conversion of optical imagery and so on, computing machine, Yun Hang release or paper identification software on computers are as carrying out optical character identification (OCR) to the answer symbol, be stored in not selected in the computing machine at release or paper option, the release of selected medium made or paper option electronic stencil, the coordinate electroactive marker subtemplate of release or paper location usefulness etc.
Before release or paper identification, need do following preliminary work:
(1), makes the electronic stencil of release or paper option, and be stored in the computing machine according to release or the selected symbol that adopts of paper option.Can also comprise in the electronic stencil of release or paper option that option is modified as the electronic stencil of not selecting the symbol that adopted after selected again, can comprise that also option revises again after selected, then be chosen the electronic stencil of the symbol that is adopted again again; The electronic stencil of not selected release or paper option, normally blank template.
(2), and be stored in the computing machine according to release or paper coordinate label creating coordinate electroactive marker subtemplate;
(3) with the cached location information in the respective option zone of release or paper in computing machine.
(4) utilize the equipment production of digital camera head, optical imagery scanner and so on or the optical imagery of scanning information card or paper,, make digital image, import and be stored in the computing machine through digital conversion;
(5) the logarithmic code image carries out normalization, removes the Flame Image Process of noise, image rectification etc.
Optical character identification (OCR) is adopted in release or paper recognition methods, referring to Fig. 1, may further comprise the steps;
(1), on release or paper digital image, seeks the coordinate mark, and, set up the coordinate of the respective option of release or paper digital image according to the positional information in the respective option zone according to coordinate electroactive marker subtemplate;
(2) according to the coordinate in the respective option zone on release or the paper digital image, the digital image in the respective option zone is carried out symbolic feature extract, obtain symbolic information;
(3) symbolic information in the respective option zone is compared the expressed answering information of symbolic information in identification the respective option zone with the electronic stencil of release or paper option respectively;
(4) format output recognition result.
Below more in conjunction with the accompanying drawings 2-7 the novel information card that adopts recognition methods of the present invention and can discern or paper and option example selected, that be modified the symbol that is adopted done introduced.
Release that this kind is novel or paper have been printed some points, line segment or curve in each option area.Point can be the point that isolates, and also can be the point on the figure, and the color of the point of being printed is not limit, and can be black, also can be colored.Line segment or curve can be that dotted line also can be a solid line.Because employed pen generally is a black during people's answer, for difference mutually, so line segment or curve should be colored, promptly except white, color the black, for example can be printed by the monochrome of a specific non-answer color such as red, green, blue, also can be to be printed by two or more non-answers color to form.
Here said option area refers to the interval that belongs to this option that each option is adjacent option mean allocation area gained.
Example one and two: specific point is printed in the fixed position around each option.This kind release or paper, to the point color without limits, can print by the monochrome of a specific non-answer color such as red, green, blue, also can be by the same with an answer color, the monochrome of (as black) is printed and is formed, shown in Fig. 2 (a) and Fig. 3 (a), (b) of Fig. 1 and Fig. 2, (c), (d) use the various situations of the line of the point around the option are expressed choice to this option respectively.
Example three and four: specific line segment is printed in the fixed position around each option, and the end points of line segment can be printed on tangible point, also can not print a little, except printing specific line segment, can also print the independent point of some stationkeeping.In these two embodiment, color to each bar line segment and point can not limit, for example can print and form by the monochrome of a specific non-answer color such as red, green, blue, also can directly be printed to black, shown in Fig. 4 (a) and Fig. 5 (a), (b) of Fig. 4 and Fig. 5, (c), (d) use the various situations of the line of the Points And lines around the option are expressed choice to this option respectively.Line segment can be printed to the color with an answer solid colour, and as black, reason is in the designed answer rule to these two embodiment, does not describe the line segment that produced, but expresses answering information with the line of point.
Example five and six: print specific line segment or curve around each option, these line segments or curve can be solid lines, also can be dotted lines, shown in Fig. 6 (a) and Fig. 7 (a) (only draw among the figure line segment or curve are the situations of dotted line).Line segment or curve can be to be printed by the monochrome of a specific non-answer color such as red, green, blue to form, but can not be to be printed by the color (as black) the same with an answer color to form.(b) of Fig. 6 and Fig. 7, (c), (d) use the situation about describing of line segment, curve are expressed choice to this option respectively.
When release or paper are taken, preferably select for use the camera lens of can elimination opposite color to take with the color of the line segment printed or curve on release or the paper, also can the utilization lighting identical in the darkroom with the printing color of release or paper, for example, if release or paper are red, so just adopt optical illumination such as redness.Because white is relative all higher to equal reflection of monochromatic light intensity with monochromatic impressing pattern, in the image information that digital equipment collected direct filtering be printed on multicolour pattern on release or the paper.Another kind method is that release that carries out digital conversion or paper digital image are carried out the color processing, elimination and the identical color of printing color.Generally speaking, stipulate that people use the answer pen as black such as pencil, black signature pen, ball pens when answer, through one or more above-mentioned treating methods, again the coordinate setting by option area and with the comparison of option electronic stencil, can obtain answer person's answering information exactly.
The electronic stencil of release or paper option is decided according to the pattern of printing on release or the paper with at the answer rule of release or paper formulation.Adopt recognition methods provided by the invention, should be in the computing machine that is used for release or paper information Recognition, fitting machine reading symbol editing machine utilizes this editing machine, can directly generate corresponding release or paper option electronic stencil according to different answer rules.For example, for second kind of example listed above, if release or paper adopt red single color printing, so, the electronic stencil of release or paper option has the unselected blank template of representative, the selected template (shown in Fig. 8 (a)) of representative, representative is modified to unselected template (shown in Fig. 8 (b)) again after choosing, and is modified to again after representative is chosen not select the template (shown in Fig. 8 (c)) then chosen again.
Machine-readable test paper provided by the invention, at the printing figures of option with print color and require similarly with release, embodiment one to six (Fig. 2-7) also can be used as the option figure of machine-readable test paper and fills out the embodiment of choosing method, repeats no more here.Embodiment seven and embodiment eight provide the selected embodiment of one examination question of machine-readable test paper respectively separately as Fig. 9 and shown in Figure 10.In these two embodiment, the option area of blank machine-readable test paper has just been printed point, is printed on the option number next door, and paper itself can adopt conventional tusche printing, needn't adopt single color printing.The broken line of line formation between points represents option selected among the figure.
Relevant coordinate mark (being commonly called as synchronous head) and template thereof, digital image acquisition disposal route, OCR method etc. owing to be used widely in the multiple technologies field, are introduced here no longer in detail.
Claims (5)
1. the information identifying method of machine-readable information card or machine-readable test paper, machine-readable information card or machine-readable objective test answer paper are provided with the coordinate mark, may further comprise the steps:
(1) according to release option or the selected symbol that adopts of paper option, make the electronic stencil of release or paper option, be stored in the computing machine;
(2) according to the coordinate label creating coordinate electroactive marker subtemplate of release or paper, be stored in the computing machine;
(3) pass through the digital image of optical image information digital switching facility Information Monitoring card or paper, and be stored in the computing machine;
(4), determine the coordinate in the respective option zone on the digital image according to the electronic stencil of the coordinate mark of release or paper;
(5) digital image to the respective option zone carries out the symbolic feature extraction, obtains symbolic information;
(6) symbolic information in the respective option zone is compared the expressed answering information of symbolic information in identification the respective option zone with the electronic stencil of release or paper option respectively.
2. the information identifying method of machine-readable information card according to claim 1 or machine-readable test paper, it is characterized in that, in step (1), also do not select being modified to again after choosing, or choose and be modified as and do not select the distinct symbols then chosen again again, make the electronics masterplate of release or paper option.
3. the information identifying method of machine-readable information card according to claim 1 or machine-readable test paper, it is characterized in that, release that described information identifying method is discerned or paper are for being printed with a plurality of points that the position is determined in the respective option zone, or many colored line segments, or the release of many colored curves or paper.
4. the information identifying method of machine-readable information card according to claim 3 or machine-readable test paper, it is characterized in that, described release or the selected symbol of paper option are the part or all of lines by between points, or part or all of colored line segment or colored curve are described resulting symbol.
5. the information identifying method of machine-readable information card according to claim 4 or machine-readable test paper, it is characterized in that, be modified to again after described release or paper option are selected and do not select, or to choose and be modified as the symbol of not selecting then to be chosen again again be between points part or all of line, or part or all of colored line segment or colored curve are described resulting symbol; The selected symbol of option before this symbol is different from.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101298121A CN100570632C (en) | 2006-12-04 | 2006-12-04 | The information identifying method of machine-readable information card or machine-readable test paper |
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| CNB2006101298121A CN100570632C (en) | 2006-12-04 | 2006-12-04 | The information identifying method of machine-readable information card or machine-readable test paper |
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| CN1975766A CN1975766A (en) | 2007-06-06 |
| CN100570632C true CN100570632C (en) | 2009-12-16 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101414356B (en) * | 2007-10-17 | 2010-09-15 | 中国科学院自动化研究所 | Method for identifying information fulfilling card based on template matching |
| CN101706864B (en) * | 2009-11-23 | 2011-07-13 | 北京飞天诚信科技有限公司 | Method for identifying logical encryption card |
| CN102236929A (en) * | 2010-04-27 | 2011-11-09 | 北京中科金财科技股份有限公司 | Acquisition and identification method of specified color pattern digitization information on bill and equipment thereof |
| CN102236927A (en) * | 2010-04-27 | 2011-11-09 | 北京中科金财科技股份有限公司 | Method and device for collecting and indentifying digital information of bill stamp pattern |
| CN101894246B (en) * | 2010-06-07 | 2012-08-08 | 飞天诚信科技股份有限公司 | Card reader and method capable of judging existence and normality of card |
| CN101901338A (en) * | 2010-07-09 | 2010-12-01 | 北京商纳科技有限公司 | Method and system for calculating scores of test paper |
| CN103310082A (en) * | 2012-03-07 | 2013-09-18 | 爱意福瑞（北京）科技有限公司 | Paper inspection method and device |
| CN103473726A (en) * | 2013-09-16 | 2013-12-25 | 重庆邮电大学 | Filling method of answer sheet information |
| CN106778750B (en) * | 2017-01-17 | 2020-02-04 | 深圳市海云天科技股份有限公司 | Method and system for accurately positioning answer sheet identification points |
| CN112464629B (en) * | 2019-09-09 | 2024-01-16 | 钉钉控股（开曼）有限公司 | Form filling method and device |
| EP3816827B1 (en) * | 2019-10-30 | 2022-07-06 | Tata Consultancy Services Limited | Method and system for securely conducting a digital examination |
| CN113378625A (en) * | 2020-10-21 | 2021-09-10 | 杭州布谷蓝途科技有限公司 | Stock form and stock form identification system convenient to automatic identification |
| CN112766213A (en) * | 2021-01-29 | 2021-05-07 | 育林汇软件有限公司 | Color presentation method for electronic answer sheet |
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2006
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