CN1584914A - Rapid machine-readable detecting and identifying method for watermark bar codes on effective tickets - Google Patents
Rapid machine-readable detecting and identifying method for watermark bar codes on effective tickets Download PDFInfo
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- CN1584914A CN1584914A CNA200410019486XA CN200410019486A CN1584914A CN 1584914 A CN1584914 A CN 1584914A CN A200410019486X A CNA200410019486X A CN A200410019486XA CN 200410019486 A CN200410019486 A CN 200410019486A CN 1584914 A CN1584914 A CN 1584914A
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Abstract
A method for detecting and identifying watermark code of valid ticket with machine includes using linear or point light source to shine vertically to watermark code, using linear array or photoelectric receiver to receive transparent light intensity curve, applying special algorithm to compare data to determine true or false of the ticket as well as information of its face, value and version for realizing mixed count of ticket in various face value.
Description
[technical field]: the present invention relates to various effective ticket of embed watermark bar code, especially detect and detection and the identification field of discerning the watermark bar code in bank note and the financial note.
[background technology]: general is to carry out extraction magnetic or optics by the feature of using the financial note that magnetic sensor or optical sensor drop into the user to carry out to its truth identification in checking the process of financial note.Also not having efficient and simple method and the machine of the face amount of financial note differentiated, generally is to utilize the size difference of the different ticket of face amount to carry out machine to differentiate.
With optical sensor the optical signature of financial note is extracted, be to extract the pattern, size, direction etc. of financial note and obtain its image graphics with transmission-type optical sensor or reflection type optical sensor, with the test pattern contrast of various value warrants, to judge the true and false and the face amount of inserting value warrant.Wherein, use the identification of transmission-type optical sensor to ticket, certificate, be with light-emitting component and photo detector with fixing distance configuration, carry ticket betwixt and detect the shading graphic of transmitted light, and compare with the standard shading graphic of the true ticket of the different denominations that is kept by memory.As the utility model patent of State Intellectual Property Office on April 21st, 2004 disclosed No. 02804841.5 " paper money identifier and paper money recognition method ".
In the process of circulation, made dirty easily in view of financial note and to be done old because of use, even same financial note, on feature, have very big deviation as the feature of the optics of the identification factor of bank note, magnetic, so by the watermark recovery of financial note, features such as nominal value decorative pattern or size are difficult to judge the true and false and its face amount.And method in the past all exists and detects the slow shortcoming of recognition speed, can not be applied in the equipment of paper currency high-speed motion such as paper money counter.
[summary of the invention]: the objective of the invention is to solve the deficiency that exists in the above-mentioned technology, a kind of be not subjected to sensor or ticket pollution effect are provided, can stably carry out the fast detecting and the recognition methods of the watermark bar code that the financial note true and false such as bank note and face amount judge.
The different motion direction that The present invention be directed to ticket adopts the line source irradiation respectively, and the linear array photodetector receives or the pointolite irradiation, and the some photodetector receives realizes data acquisition.
1, when ticket (ticket paper feed direction on corresponding to high speed watermark bar code pick-up unit when its Width moves, see Fig. 1), ticket watermark bar code district is carried out shining perpendicular to the line source of watermark bar code, receive the transmitted light light intensity curve with the linear array photoelectric receiving device, carry out the comparison of data with the typical curve that is stored in advance in the storing mechanism then.When during as reference, ticket respective regions printing opacity curve to be measured and its being compared with special algorithm with the printing opacity curve in the watermark bar code district of certain ticket.Compare the true and false that to judge ticket according to two curve ratio than the result of back gained and the thresholding of setting.And, can also make according to different watermarks, obtain difform transmitted light change curve, for example shown in Figure 3, (Fig. 3 a) for sinusoidal curve, square-wave curve (Fig. 3 b) and saw-toothed curve (Fig. 3 c) or the like, the cycle of these curves also can change and variation performance period with the spacing of watermark bar code in addition, and promptly the curve cycle is not waited in same curve.Further, can survey same watermark bar code to the receiving element of respective wavelength sensitivity, obtain no transmitted light change curve, thereby improved false proof distinguishing ability by the monochromatic source combination of using different wave length.
Concrete steps are as follows:
---line source produces: at first the light that sends from light source is after beam expanding lens expands bundle, and assembling through cylindrical mirror becomes line source, or directly uses linear light source;
---irradiation: will go up the step line source along the watermark bar code zone that shines ticket perpendicular to the direction of watermark bar code;
---receive: on go on foot transmitted light after optical filter filters extraneous parasitic light, by the linear array photoelectric receiving device, receive as line array CCD or photodiode array, convert light signal to electric signal;
---handle: on go on foot electric signal after signal processing circuit, send into single-chip microcomputer or computing machine and carry out data processing, or in the analog or digital circuit, carry out data processing;
---computing: go up the step signal warp of sending into single-chip microcomputer and the data of storing in advance and compare computing, the operation result and the predefined thresholding that finally obtain are compared, draw ticket, certificate or face amount information, perhaps by the analog or digital circuit directly and reference waveform relatively obtain relevant information.
Light radiating portion light source kind is LD or LED, wavelength coverage from visible light to infrared light scope, i.e. 370nm-3000nm.
2, when ticket (ticket paper feed direction on corresponding and the accurate dynamic watermark bar code pick-up unit when its length direction moves, see Fig. 2), pointolite is by carrying out scanning perpendicular to watermark bar code with the relative motion of ticket to ticket watermark bar code district, receive the transmitted light light intensity curve with a photoelectric detector, carry out the comparison of data with the typical curve that is stored in advance in the storing mechanism then.When during as reference, ticket respective regions printing opacity curve to be measured and its being compared with special algorithm with the printing opacity curve in the watermark bar code district of certain ticket.Compare the true and false that to judge ticket according to two curve ratio than the result of back gained and the thresholding of setting.And, as described in 1, also can make according to different watermarks, obtain difform transmitted light change curve, improved false proof distinguishing ability.
Concrete steps are as follows:
---pointolite produces: at first the light that sends from light source collimates through collimation lens;
---irradiation: will go up the beans-and bullets shooter light source irradiation to the watermark bar code zone of ticket, the relative motion by pointolite and ticket reaches the edge and scans perpendicular to the watermark bar code direction;
---receive: on go on foot transmitted light respectively through after optical filter and diaphragm filter extraneous parasitic light, by a photoelectric detector, receive as CCD or photodiode, convert light signal to electric signal;
---handle: on go on foot electric signal after signal processing circuit, send into single-chip microcomputer or computing machine and carry out data processing, or in the analog or digital circuit, carry out data processing;
---computing: go up the step signal warp of sending into single-chip microcomputer and the data of storing in advance and compare computing, the operation result and the predefined thresholding that finally obtain are compared, draw ticket, certificate or face amount information, perhaps by the analog or digital circuit directly and reference waveform relatively obtain relevant information.
Light radiating portion light source kind is LD or LED, wavelength coverage from visible light to infrared light scope, i.e. 370nm-3000nm.
The advantage and the good effect of the invention of this reality:
1, by the watermark bar code in the detection and Identification ticket, not only can tell truth from falsehood, can also obtain information such as ticket face amount and version.Watermark bar code on the ticket has carried the face amount information of ticket, by the analysis to the transmitted light curve, can distinguish the ticket of different denominations, thereby realizes the mixed point of each face amount ticket; Further, can also on watermark bar code, load other information except that face amount, such as version number and printing time etc.
2, this method is at ticket different motion direction, propose two kinds of methods respectively and realize the collection of transmitted light curve: when ticket when its Width moves, by cylindrical lens the pointolite that LD or LED form is expanded to line source, can realize the line source irradiation to watermark bar code, by the linear array photoelectric receiving device,, receive again as line array CCD or photodiode array, significantly raising information reads recognition speed, thereby can satisfy the application in high speed watermark bar code pick-up unit; When ticket when its length direction moves, pointolite irradiation watermark bar code district, relative motion by pointolite and ticket reaches along scanning perpendicular to the watermark bar code direction, receive by a photodetector, be applicable to the accurate dynamic watermark bar code pick-up unit of ticket along its length direction paper feed.
3, because watermark bar code itself has the transmitted light intensity variation greatly, be easy to detection and Identification; Characteristics such as the feature area is big, and detectable identification dynamic range is big are surveyed and are discerned watermark bar code, can fast and effeciently extract corresponding information, thereby can stably differentiate ticket, certificate, accurately extract ticket face amount and some other relevant informations.
4, can obtain the specific light transmission light change curve of specific light source correspondence by employing different monochromatic sources (wavelength variation range 370nm-3000nm) with to the light activated photoelectric receiving device of respective wavelength, thereby improve false proof usefulness greatly.
[description of drawings]:
Fig. 1 be the present invention for ticket along its Width detection of motion experimental provision simplified schematic diagram;
Fig. 2 be the present invention for ticket along its length direction detection of motion experimental provision simplified schematic diagram;
Fig. 3 is typical printing opacity curve synoptic diagram;
Fig. 4 is the corresponding monolithic processor controlled circuit part block schematic that this method is applied to the watermark bar code pick-up unit.
[embodiment]:
Embodiment 1:
The present invention is the photoelectricity transmissometry to its ultimate principle employing of effective ticket recognition methods, the laser (power bracket 10-100mW) that utilizes certain intensity is along shine ticket (see figure 1) or irradiation watermark bar code district perpendicular to the watermark bar code direction, relative motion by light source and ticket reaches the edge perpendicular to the watermark bar code scanning direction, and receive transmitted light with linear array photodetector or some photodetector, extract the corresponding information in watermark bar code zone on the tickets sample by the Strength Changes of measuring transmitted light, further analyze again.A part can be because diffuse reflection when light saw through ticket, scattering and be absorbed and the outgoing light intensity is weakened, and the intensity that weakens depends primarily on the variation in thickness of ticket relevant position.Therefore on LASER Light Source, selected the laser monochromatic source (wavelength variation range 370nm-3000nm) of visible light to infrared wavelength.The light ratio short-wavelength light that the laser instrument of near-infrared wavelength sends will be lacked by material absorbing, and this has just reduced the influence of tickets sample picture on surface change color to transmittance.Cooperate detector can reduce the influence to received signal of extraneous light to greatest extent simultaneously to the respective wavelength sensitivity.
As Fig. 1 be in this method bank note along its Width detection of motion experimental provision sketch, the direction of arrow is indicated ticket direction of motion among the figure, 1-monochromatic light laser instrument among the figure, the 2-beam expanding lens, 3-cylindrical mirror, 4-have the ticket of watermark bar code, the 5-optical filter, 6-linear array photelectric receiver, as line array CCD or photodiode array, 7-data acquisition and treatment circuit.Experimental technique is: the laser that sends from light source is after beam expanding lens expands bundle, through cylindrical mirror gathering becoming line source, along the watermark bar code zone that shines ticket perpendicular to the direction of watermark bar code, transmitted light filters extraneous parasitic light by the linear array photelectric receiver through optical filter, receive as line array CCD or photodiode array, convert light signal to electric signal and carry out data processing by single-chip microcomputer or computing machine again through the interlock circuit processing, perhaps directly handle by mimic channel or digital circuit, Cun Chu data application specific algorithms compares in advance, data result that obtains the most at last and predefined thresholding compare, draw information such as ticket, certificate or face amount, perhaps directly by the analog or digital circuit directly and reference waveform relatively obtain relevant information.
As Fig. 2 be in this method bank note along its length direction detection of motion experimental provision sketch, the direction of arrow is indicated ticket direction of motion among the figure, 1-monochromatic light laser instrument among the figure, 8-collimation lens, 4-have the ticket of watermark bar code, the 5-optical filter, the 9-diaphragm, 10-point photodetector, as CCD or photodiode, 7-data acquisition and treatment circuit.Experimental technique is: the laser that sends from light source collimates through collimation lens, shine the watermark bar code district, relative motion by light source and ticket reaches along the scanning direction watermark bar code zone perpendicular to watermark bar code, transmitted light filters extraneous parasitic light by a photodetector through optical filter and diaphragm respectively, receive as CCD or photodiode, convert light signal to electric signal and carry out data processing by single-chip microcomputer or computing machine again through the interlock circuit processing, perhaps directly handle by mimic channel or digital circuit, Cun Chu data application specific algorithms compares in advance, data result that obtains the most at last and predefined thresholding compare, draw information such as ticket, certificate or face amount, perhaps directly by the analog or digital circuit directly and reference waveform relatively obtain relevant information.
In addition, if the position in ticket Width and watermark bar code symmetry is also carried out monochromatic line light source irradiation and reception (two-way) according to the method described above, just can solve tickets sample and place problem, promptly not be subjected to tickets sample face placement location variable effect anyway, thereby improve operating efficiency.
Fig. 4 is the corresponding monolithic processor controlled circuit part block schematic that this method is applied to the watermark bar code pick-up unit, and optical signal transmissive send single-chip microcomputer to carry out real and fake discrimination after signal processing circuit, by single-chip microcomputer signal is carried out logical process and effective recognition; Drive and control performers such as motor, display device, warning device simultaneously, finish multiple actions such as automatic start-stop, condition start and stop, fault handling, demonstration, warning.
Claims (3)
1, a kind of quick machine-readable detection and recognition methods that is used for the watermark bar code of effective ticket comprises light emission and light-receiving two parts, it is characterized in that this method finishes according to the following steps:
A. when ticket when its Width moves:
---line source produces: at first the light that sends from light source is after beam expanding lens expands bundle, and assembling through cylindrical mirror becomes line source, or directly forms linear light source;
---irradiation: will go up the step line source along the watermark bar code zone that shines ticket perpendicular to the direction of watermark bar code;
---receive: on go on foot transmitted light after optical filter filters extraneous parasitic light, receive by the linear array photoelectric receiving device, convert light signal to electric signal;
---handle: on go on foot electric signal after signal processing circuit, send into single-chip microcomputer or computing machine and carry out data processing, or in the analog or digital circuit, carry out data processing;
---computing: go up the step signal warp of sending into single-chip microcomputer and the data of storing in advance and compare computing, both comparative result and the predefined thresholding that finally obtains compared, draw ticket, certificate or face amount information, perhaps by the analog or digital circuit directly and reference waveform relatively obtain relevant information;
B. when ticket when its length direction moves:
---pointolite produces: at first the light that sends from light source collimates through collimation lens;
---irradiation: will go up the beans-and bullets shooter light source irradiation to the watermark bar code zone of ticket, the relative motion by pointolite and ticket reaches the edge and scans perpendicular to the watermark bar code direction;
---receive: on go on foot transmitted light respectively through after optical filter and diaphragm filter extraneous parasitic light, by a photoelectric detector, convert light signal to electric signal;
---handle: on go on foot electric signal after signal processing circuit, send into single-chip microcomputer or computing machine and carry out data processing, or in the analog or digital circuit, carry out data processing;
---computing: go up the step signal warp of sending into single-chip microcomputer and the data of storing in advance and compare computing, the operation result and the predefined thresholding that finally obtain are compared, draw ticket, certificate or face amount information, perhaps by the analog or digital circuit directly and reference waveform relatively obtain relevant information.
2, a kind of quick machine-readable detection and recognition methods that is used for the watermark bar code of effective ticket according to claim 1, it is characterized in that light radiating portion light source kind is LD, LED or other line source, wavelength coverage is that visible light from 370nm-3000nm is to the infrared light scope.
3, a kind of quick machine-readable detection and recognition methods that is used for the watermark bar code of effective ticket according to claim 1 and 2, it is characterized in that when ticket when its Width moves, photoelectric receiving device can be line array CCD or photodiode array class linear array photoelectric detector; When ticket when its length direction moves, photoelectric receiving device can be CCD or photodiode class point photoelectric detector.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200410019486XA CN1286054C (en) | 2004-06-09 | 2004-06-09 | Rapid machine-readable detecting and identifying method for watermark bar codes on effective tickets |
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| CNB200410019486XA CN1286054C (en) | 2004-06-09 | 2004-06-09 | Rapid machine-readable detecting and identifying method for watermark bar codes on effective tickets |
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| CN1584914A true CN1584914A (en) | 2005-02-23 |
| CN1286054C CN1286054C (en) | 2006-11-22 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392665C (en) * | 2004-10-20 | 2008-06-04 | 中国印钞造币总公司 | Method for recognizing watermark bar code and its recognizing device |
| CN102044091A (en) * | 2010-10-22 | 2011-05-04 | 周建军 | Self-service ticketing system |
| CN104822286A (en) * | 2012-07-30 | 2015-08-05 | 克兰支付革新有限公司 | Coin and method for testing coin |
| CN107393120A (en) * | 2017-07-19 | 2017-11-24 | 芜湖市奥尔特光电科技有限公司 | A kind of document check meter of automatic alignment light source |
| CN107463863A (en) * | 2017-09-04 | 2017-12-12 | 广州杰赛科技股份有限公司 | Quick Response Code abnormality recognition method, device and system, share bicycle |
| CN109596579A (en) * | 2017-09-30 | 2019-04-09 | 维科托（北京）科技有限公司 | For the incidence system of atomic fluorescence detection device and the mounting bracket of excitation light source |
-
2004
- 2004-06-09 CN CNB200410019486XA patent/CN1286054C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392665C (en) * | 2004-10-20 | 2008-06-04 | 中国印钞造币总公司 | Method for recognizing watermark bar code and its recognizing device |
| CN102044091A (en) * | 2010-10-22 | 2011-05-04 | 周建军 | Self-service ticketing system |
| CN104822286A (en) * | 2012-07-30 | 2015-08-05 | 克兰支付革新有限公司 | Coin and method for testing coin |
| CN107393120A (en) * | 2017-07-19 | 2017-11-24 | 芜湖市奥尔特光电科技有限公司 | A kind of document check meter of automatic alignment light source |
| CN107463863A (en) * | 2017-09-04 | 2017-12-12 | 广州杰赛科技股份有限公司 | Quick Response Code abnormality recognition method, device and system, share bicycle |
| CN107463863B (en) * | 2017-09-04 | 2020-05-15 | 广州杰赛科技股份有限公司 | Two-dimensional code abnormity identification method, device and system, and shared bicycle |
| CN109596579A (en) * | 2017-09-30 | 2019-04-09 | 维科托（北京）科技有限公司 | For the incidence system of atomic fluorescence detection device and the mounting bracket of excitation light source |
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| Publication number | Publication date |
|---|---|
| CN1286054C (en) | 2006-11-22 |
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