CN1458618A - Photoelectric file reader for reading UV/IR visual mark - Google Patents
Photoelectric file reader for reading UV/IR visual mark Download PDFInfo
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- CN1458618A CN1458618A CN03106900A CN03106900A CN1458618A CN 1458618 A CN1458618 A CN 1458618A CN 03106900 A CN03106900 A CN 03106900A CN 03106900 A CN03106900 A CN 03106900A CN 1458618 A CN1458618 A CN 1458618A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10712—Fixed beam scanning
- G06K7/10722—Photodetector array or CCD scanning
- G06K7/10732—Light sources
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/12—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using a selected wavelength, e.g. to sense red marks and ignore blue marks
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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
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/143—Sensing or illuminating at different wavelengths
Abstract
A optoelectronic document reading apparatus for reading UV/IR visible indicia, UV (or IR) light source of the reading apparatus can be switched to UV (or IR) illuminating frequency or frequency range of stable peak value to illuminate covert UV (or IR) visible indicia and be visible. An optoelectronic image sensor captures a document image including the indicia rendered visible by the UV source illumination, and the covert indicia is identified from the captured image. An optical path, being folded by two mirrors, extends between a reading surface and the image sensor, providing compact geometry for the reading apparatus. A lens for focusing light defining the image onto the image sensor is provided in the optical path. The reader may also include arrays of visible light sources for illuminating visible light indicia, in addition to UV and IR LED arrays, and any IR light sources may also be used for illuminating visible OCR characters according to ISO 1831. A controller is provided to sequentially drive each different light source bank.
Description
Technical field
The present invention relates generally to security appliance field, particularly relate to a kind of photoelectricity document reader, only be used to read and outside the visible spectrum be just visible material under ultraviolet (UV) or infrared (IR) rayed, this material is other mark printed on literal, image or the file or the form that is embedded in the visible material in the suprabasil surface of file.
Background technology
Some known method of file security raising such as passport or other identity document has only utilized the visible material of ultraviolet (UV) light time.These materials are added to the particular ink that is used for security printing, so that the UV witness marking is printed on the file, like this, the people who generally sees this document can not know that this mark is arranged on file, but there is the people (for example customs officer) of special knowledge under the UV illumination condition, to check this document, to discern the authenticity that this mark is used to evaluate file.The known device that is used to discern this secret formula UV typographic(al) mark comprises the UV fluorescent tube that can send UV illumination.During use, will checked file be positioned under the UV illumination that this class device sends, so that allow any concealed formula UV witness marking on the file produce fluorescence (can be examiner's eyes finding) with visible light.Because these devices only are used to shine the specific region simply, they are passive types but disadvantageously; And they itself can not read the invisible mark that (promptly deciphering by automated procedure) printed by the UV fluorescent ink.On the contrary, whether comprise any concealed mark in order to judge file, the user who needs this known devices observes with manual type and in person image is as a result carried out decipher.In addition, the UV fluorescent tube will have very long stabilization time, so they can not adapt to any such as the required high speed processing application of the aut.eq. that reads UV ink marking.In addition, because the illumination wavelength that this fluorescent tube produces is generally understood time to time change, their just instabilities (so also unreliable) own.
Therefore, in order to have the only secure file of visible bound substances when UV or IR rayed, need a kind of document reader based on automatic fundamental operation Cai fair speed ground is handled.In addition, needing a kind of can be the document reader that the mark of this concealed UV ink (or IR ink) printing is read on the basis with justifying.The light that also needs to utilize frequency or frequency band to be positioned at the scope of one of infrared, visible and ultraviolet light frequency band comes the reader in one or more predetermined surfaces zone of shot file, described frequency band depends on the specific markers that will read on this document zone, and this reader can also switch to another frequency rapidly from a said frequencies or frequency band.Have again, need a kind of can automatic reading and the document reader of this mark of decipher.In addition, need a kind of document reader that constitutes by solid state device, to reduce or the cancellation movable part.
Summary of the invention
According to the present invention, the photoelectricity document reader and the method for first mark in a kind of mechanical-readable zone of automatic reading file is provided, this is first invisible when being marked at radiation of visible light, and with the invisible light irradiation of scheduled frequency range the time as seen.Read the surface for file layout is provided with, this document comprises will be by the mechanical-readable zone of reader reading.A plurality of first light sources and reading surface are separated, and these first configurations of light sources are become: when this first light source starts, can utilize invisible light (for example peak wavelength is the UV light of the 370nm) irradiation of scheduled frequency range to read the mechanical-readable zone of lip-deep file, thereby allow first mark become as seen.The arrangement plan image sensor in order to the light defined image of seizure by focusing, and produces the electronic data of representing the image of being caught.Light path is extended reading between surface and the image sensor, and it comprises lens, be used for focused ray to the sensor to define image.When first light source started, document image comprised by reading the surface and above sending and/or first mark of the light definition of reflecting in the machine readable files zone of part, gives sensor by light path with this document image transfer, and catches this document image by this sensor.The configuration file controller, in order to identification marking from the image that is captured, and the output mark that obtains discerning shows and/or handles.
First light source can be UV LED, is constructed to be permeable to send the light of predetermined ultraviolet frequencies scope, and like this, first mark comprises the UV fluorescent material that can send visible light when using the rayed of predetermined ultraviolet frequencies scope.Preferably, light path can be folded up by a plurality of reflectings surface in this light path.
Document reader also be preferably configured as can automatic reading second mark in the machinery readable region, this second is visible when being marked at radiation of visible light.A plurality of secondary light sources (for example visible LED) are separated with the reading surface, can shine mechanical readable region with visible light (for example peak wavelength is the light of 650mm) when starting.In a single day secondary light source starts, and document image just comprises defined second mark of light that is sent and/or reflected by the mechanical-readable zone.In addition, document reader also is preferably configured as the 3rd mark in the energy automatic reading machinery readable region, and the 3rd mark comprises the character according to OCR standard criterion structure.A plurality of the 3rd light sources (for example IR LED) are separated with the reading surface, are configured to when the 3rd light source starts, can be according to the rayed mechanical-readable zone of OCR standard criterion with predetermined infrared frequency.The 3rd light source is in case start, and document image just comprises by the mechanical-readable zone and sending and/or the 3rd mark of the light definition of reflecting.
In the present invention, be provided for controlling the controller that light source starts (for example based on IR, visible and UV order), be arranged on the optical filter in the light path between lens and image sensor, this optical filter is used to remove the reflected light of first light source, and is provided for from the pattern recognition mark of catching and exports the file controller of this identification marking to show and/or to handle.
Arrange light source according to following manner: first light source is drawn together in first package, and secondary light source is drawn together in second package, and the 3rd light source is drawn together in the 3rd package, and each row's light source arrangement is become can provide uniform irradiation to the mechanical-readable zone.In addition, the intensity of illumination that produced of every row's light source is corresponding to the intensity that can avoid image sensor to reach capacity.
Description of drawings
Describe the present invention in detail with reference to preferred embodiment and associated following accompanying drawing, wherein in the whole text with same numbering indication identity element.
Fig. 1 (a) and Fig. 1 (b) represent respectively based on the optics principle of work of document reader of the present invention and the synoptic diagram of light path;
Fig. 2 is will be with the floor map of the illustrative file of using based on document reader of the present invention, this illustrative file comprises 5 zoness of different (field), is only utilizing under the illumination condition outside the visible spectrum just visible ink to print dissimilar identification markings on these zones;
Fig. 3 is the synoptic diagram of the relative populations of employed IR in the preferred embodiment that is illustrated in based on document reader of the present invention, visible and UV LED;
Fig. 4 is the schematic block diagram of expression based on the assembly of the preferred embodiment of document reader of the present invention; And
Fig. 5 is the exemplary software performed flow chart of steps of expression by the document reader operation of Fig. 4.
Embodiment
Fig. 1 (a) expression is by the optics principle of work of using based on the preferred embodiment of document reader of the present invention.Based on control and fast, the rayed file 10 that utilization is sent from array of source 35, described array of source comprises the dissimilar LED of three rows, can send the IR LED of the light of infrared band, the visible LED of light (visible spectrum) that can send visible band and the UV LED that can send the light of ultraviolet frequency band.In a preferred embodiment, allowing dissimilar LED (being IR, visible and UV) shine based on a definite sequence, can shine according to the type sequence of LED like this, for example, at first is the IR irradiation, secondly is radiation of visible light, is the UV irradiation at last.Optionally, in order to shine rapidly and to read interested particular image, the user can select corresponding to the frequency of used LED type or frequency classification (for example UV).
Many secure files such as machine-readable travel document (MRTD) comprise printed information, this printed information must meet following standard: managing and passing through the ISO1831 of International Standards Organization standard that optical character identification (OCR) standard reads character, and require the visible travel document standard of this character (file 9303, the 7.2.1 sections) by what International Civil Aviation Organization worked out.According to the regulation of ISO1831, any security feature that occurs in the mechanical-readable zone (MRZ) of file must not disturb in the B900 scope, and promptly (900 ± 50nm) spectra part is to the accurate reading of any OCR character near infrared.
Optionally, IR LED row also can be respectively or is used for two purposes simultaneously, and one is the character reading that is used for according to OCR standard above-mentioned, and the secondth, be used to shine concealed IR witness marking so that make this mark visible and readable.In this embodiment, utilizable energy sends the material (being ink) that sends fluorescence under the IR illumination of frequency concealed mark is printed on the file at IR LED.In this way, the visible mark of this secret IR will work in the mode identical with the concealed UV witness marking mode of embodiment described herein.
The transparent window (not shown) provides the reading surface of layout of file 10 and the protective cover surface of reader, and form is positioned between the reader optics shown in file and Fig. 1 (a).
The light wave of LED emission provides the uniform irradiation to the whole file mechanical-readable zone (MRZ) that will read under this illumination condition, can connect the rapid reading file of mode of one page like this based on one page.By file 10 send and/or the light wave transmissions that reflects to the mirror 20 of bottom, then by the mirror 25 of this specularly reflected to top, and reflected downwards herein, at first scioptics 30, the light wave of file emission/reflection is understood coalescence to be focused on, by optical filter 32, then project on the photoelectric image sensor 40 then.
As shown, lens 30 are very approaching with the optical characteristics and the mechanical azimuthal of mirror 20,25, whole M RZ (can be focused on photoelectric image sensor 40 (among the described herein embodiment on the 6.91mm * 4.6mm) up to 120mm * 80mm) among the described herein embodiment thus, simultaneously can not cause remarkable distortion again, like this can be with long light path folding to the compact apparatus that is positioned at reader inside.
The fluorescent material of printing on the file 10 is excited by UV LED illumination, send than on sensor 40, producing the required wide light wave frequency spectrum of light wave frequency spectrum of sharp image, optical filter 32 (cutoff wavelength is 420nm) constriction the spectrum of this broad.Optical filter 32 does not influence visible light or near IR light, (the CCD image sensor is very sensitive to it but it can eliminate the useless UV electromagnetic wave that is reflected, it can show image too bright and be too fuzzy) and some interior visible light wave of purple frequency band, these light waves just can not arrive image sensor 40 like this.Advantageously, the parts of eliminating useless UV spectrum have improved visible band and near the image of IR frequency band.
For being used for the image sensor 40 that document reader described herein selects are CCD (charge-coupled device (CCD)s), are particularly made by U.S. Eastman Kodak company or sensor that the product identifiers with KAF-401E of supply is sold.Other sensor that is suitable among the different embodiment comprises for example by COMS sensor and the CIS (hookup image sensor) of Kodak company with the product identifiers supply of KAC-1310.
In order to extract the special characteristic of the material printed such as portable data file (PDF) image, visual image, OCR literal, UV etc. such as photo, it is the MRZ (viewing area) of 120mm * 80mm (seeing the zone 50 of file 10 shown in Figure 2) that image sensor 40 is caught area, also utilizes sensor 40 to give main frame by RS-232 port, parallel port and Ethernet interface arrangement with the feature of extraction and optional seizure image transfer.Advantageously, for this viewing area, CCD40 and the hardware that combines are the digital data form seizure image (if be ready, can select different sensors to obtain higher resolution) of 768 pixels * 512 pixels with resolution.
Fig. 1 (b) shows the light path of reader.The geometric configuration of light path depends on the focal length (being 10.3mm among the described herein embodiment) of magnification (being 0.058 herein among the embodiment of Miao Shuing), field of view (FOV) and lens 30.Utilize the two sides mirror 20,25 shown in Fig. 1 (a) and Fig. 1 (b) to come folded optical path, make its size be reduced to minimum, so that can be installed in the compact reader.Select the f-number (, electing them as 2.8) of lens for the concrete equipment of described embodiment according to illumination, the depth of focus, diffraction and aberration effect.
In the past, those skilled in the art considered that, can't implement based on the high resolving power automated imaging reader of reader of the present invention because the chromatic aberation of utilizing multispectral when band to produce influences with the aforementioned performance deficiency relevant with the UV light pipe.Can send and expand to that to be used for laser technology near visible spectrum or visible/LED matrix of invisible light of being lower than the crest frequency of visible spectrum be known.The present invention has determined to be constructed to be permeable to send the similar solid-state LED matrix array of UV light can success and be advantageously used in document reader, thereby realizes automatic UV image reading.
Among the present invention, utilize suitable UV fluorescent printing material together with suitable UV irradiation, and be used in combination lens 30, this chromatic aberation effect can be reduced to acceptable level with enough depths of focus.In addition; because the UV fluorescent material of file is as the light source under the UV illuminate condition; rather than resemble that light absorbing visual printed character/figure that way; therefore in order accurately to read the material that the UV ink is printed; necessary is allows the file substrate and any protective seam of covering on the file is inactive (meaning that it should not contain the unnecessary UV sensitive materials that noisy image is accurately read) to UV, and the background area of UV ink printing area is an absorption-type (promptly black) and glitch-free.In addition, must avoid making image sensor saturated.This can the intensity when guaranteeing rayed different LED array that file sends/reflect be complementary, and (by the suitable triggering level of control LED) avoided.
Utilize UV LED (comparing) can allow the exposure duration of UV irradiation obtain strict control and switching rapidly with the UV pipe.Particularly, when using be the LED of 50 nanoseconds stabilization time, can in several milliseconds, switch the Kai Heguan that UV shines.The UV light frequency that is used for shot file selects to depend on the UV LED that will select, and this depends on ink material or exciting as the substrate of the concealed safe material that is read by reader.For preferred embodiment, selecting by supply of Nichia company and/or the product identifiers made is that the UV LED of NSHU550E is used for the UV array of source.This UV LED product sends the narrow band light photograph that peak wavelength is 370nm, and is provided the shorter stabilization time (promptly from starting to the required time of irradiation that obtains peak wavelength) of 50ns.Also in this UV LED, constructed and to have protected the Zener diode that not influenced by Electrostatic Discharge.Among the present invention, be chosen in and be subjected to predetermined UV frequency (promptly, in a preferred embodiment for 370nm) the exciting of light the time can send appropriate frequency (, appropriate wavelength is the blue light of 423nm in a preferred embodiment) the UV fluorescence of visible light print ink, making it the lens 30 very little with having enough depths of focus and chromatic aberation is used in combination, so that utilize software described herein that the chromatic aberation effect is reduced to acceptable level, the result can capture the image of useful UV ink marking.Do not wish to allow some unwanted light frequency reflex on the lens 30 in this process.In order to stop these useless UV light frequencies, in light path, introduce optical filter 32, it is arranged on before the sensor 40, and optical filter 32 is that cutoff wavelength is the high pass UV wave filter (by the supply of EdmundIndustrial Optics company and make, product identifiers is GG420) of 420nm.
In this area, the UV fluorescent ink is very known, and those skilled in the art can easily select the file that suitable UV fluorescent ink is used for concealed material is printed onto given application.For example, for the heat conduction printing is used, can select to use the ink of in the United States Patent (USP) 6155168 of the Alps Electric company limited that authorizes the Tokyo, describing.Other suitable UV fluorescent ink source is the Angstrom Technologies company of Kentucky, USA.Use for laser printing, can obtain suitable UV fluorescence electrophotographic toner from the said firm.
Document reader can detect and handle all kinds of concealed material that comprises all kinds of hiding images of printing with the UV fluorescent ink, they comprise such as those that utilize overlapping deflection by the application's assignee based on source image and encrypt that image makes and are called as the machine-readable alphabetic character line of Pixelplex image, two-dimensional bar, and the safety feature image (be in 09/553454 the unsettled U.S. Patent application as sequence number in application in 19 days April in 2000 of described assignee and corresponding PCT openly apply among the WO01/80512 described in detail, at this by with reference to their content is incorporated).
Optionally, light path can comprise the electrostatic mirrors (not shown among Fig. 1 (a) and Fig. 1 (b)) of reflection and pellucidity, is applied to the optics tunable arrangement such as hologram or developing figure of this document in order to checking.
Fig. 2 represents the planimetric map of paper sample layout, and promptly the identifying page of passport is provided with 5 independent safety zones that comprise the UV fluorescent material whereby.Each all comprises the machine readable literal (alphanumeric character) that utilizes suitable fluorochrome materials, printed on zone 1 and 3, and when the predetermined UV frequency irradiation of using corresponding to selected UV LED frequency band, they can send fluorescence.Utilize image sensor 40 to detect the character and picture of UV irradiation, utilize traditional OCR-B literal computing (those computings known in those skilled in the art, they obtain on market easily) to carry out decipher then.Preferably, for the security that provides by these zones is provided, can utilize suitable software computing (this computing on market easily obtain) literal is encoded and to encrypt.In a preferred embodiment, zone 3 content is the numeral corresponding to passport No., like this should the zone with the cross check of doing occurring on the file with the passport number of visual way printing.
The zone 2 of sample file shown in Fig. 2 comprises the coded markings of representing literal, and these literal have utilized the deflection image to encode, and it is shown as a series of perpendicular line in the UV fluorescent material like this.The also available image sensor 40 of this mark detects, and carries out decipher (i.e. decoding) with the suitable software in the reader.
Zone 4 comprises the two-dimensional bar of the form of portable data file (PDF) 417 images, and they are printed with the UV fluorescent material.Well known to a person skilled in the art to be that when used specified resolution allowed, this two-dimensional bar image comprised the combination in any of image and alphameric listeral.The PDF image can detect by image sensor 40, and by the suitable software decipher in the reader.Optionally, bar code is resolved into several segments, these several segments are distributed to (information that the software systems of reader can be known or obtain) on the file page in a predefined manner.Owing to there is not the visible bar code of user under ordinary ray, so the situation that bar code becomes part can not influence the user.But, since the specific part that reader reads arrange must be consistent with the known predetermined arrangement of reader, another security feature of file just is provided.Be not inconsistent with known permutation if find the bar code part arrangement that reader reads, reader is just with the checking evaluation process of file identification for not implementing by it.
Zone 5 comprises the safety feature Pixelplex image of printing with the UV fluorescent material.As shown in Figure 2, be preferably passport possessor's photo by the encrypted source image of concealed formula Pixelplex image representation, it just appears on the identifying page when passport being awarded to the mandate possessor, could allow passport possessor's photo show by means of the Pixelplex image is decrypted thus.
Base material by the file page provides another security feature (not shown in Fig. 2), and it is not limited to regional 1-5, that is, and and the stochastic distribution of the UV fluorescent paper pulp fibres in the cardboard of the include file page.Knownly can introduce such fiber in common safety paper manufacture process, their last distributions in the paper substrates of finishing are to determine at random.Utilize the randomness of these fibers help when making or publish file by discern they on the page the position and with these ad-hoc locations and specific file association, and provide the safety practice assurance.Document reader detects also and reads these fibers, comprises their positions on the page, and when making or publish file with these information with make comparisons about the Given information of position of fibers.If two groups of information are not inconsistent, reader just thinks that this document can not be by checking evaluation process.
Fig. 3 represents the layout of led array 35 in the preferred embodiment of document reader.LED is installed in the substrate 36 of thermoplastic form, and they have two erection joints 34 that can be installed in the reader shown in Fig. 1 (a) and Fig. 1 (b) and install across reader.Consider that following factor the general layout (arrangement) of LED among every row LED is provided provide enough and illumination uniformly for file 10: (i) directivity of LED (visual angle); (ii) the people is to the non-linear visual (that is, the unit change of brightness is not corresponding with the unit change of visual sensitivity) of image; (iii) image sensor (CCD) is avoided saturated dynamic range; (iv) image sensor (CCD) is the variable response of wavelength variations: the quantum efficiency of sensor (QE) is higher when ruddiness, and is lower when blue light; And (v) be installed to compactedness required in the substrate.As shown in Figure 3, UV LED37 cross direction profiles is positioned at facing to the quantity of the locational UV LED37 of each end of substrate 36 more in substrate.Similarly, in substrate 36, and higher near infrared LED 38 and visible LED39 also cross direction profiles in the density of the end of substrate 36.
In turn this three rows (group) LED is started a period of time, this time is depended on the brightness of printed material (being ink), and start-up time is usually between 10 milliseconds to 2 seconds.For the operate in standard mode of preferred embodiment, the preferred sequence that starts led array is IR LED, visible LED in proper order, is UV LED then.Send the light of crest frequency in 900 ± 50nm scope to satisfy the ISO1831 standard near IR LED.As seen LED sends the light of frequency range at 400nm-600nm, and UV LED sends the light of frequency range at 360nm-380nm, and their crest frequency is respectively 650nm and 370nm.But for given application, any or all LED needs at the appointed time to start, so that the specific printed image of irradiation user's interest.For example, when hope utilizes optical character recognition process to read to be printed on literal on the file according to the ISO1831 standard, can start IR LED.Equally, when utilizing reader to read, can start visible LED and shine the subject matter of printing with visual way on the page, and/or start the image that UV LED irradiation is printed with the UV fluorescent ink.On image sensor 40, utilize the host software system to carry out decipher irradiated image focusing, for the user bear results (promptly reading image) show.
Fig. 4 represents the assembly and the interaction thereof of preference file reader with the block scheme form.Image sensor 40 is CCD in a preferred embodiment, and it catches the image of visible digital data form under added illuminate condition, and sends it to visual random-access memory (ram) 45.Flash chip 47 is set comes storing firmware and construction data.Digital signal processor (DSP) is carried out processing capacity to digitized picture information, and the DSP that selects for preferred embodiment is provided by Texas Instruments company, and its product identifiers is TMS320C32.As shown in Figure 4, use the reading controller 60 of field programmable gate array (FPGA) logic chip form to carry out various control function in a preferred embodiment, these functions comprise data are sent to visual RAM45 from CCD40, data bus between control DSP110 and the visual RAM45, control peripheral interface (comprising control led array 35) and image enhancement.Send the document image of gained to the main frame (not shown) by serial, parallel or Ethernet interface 70.
Document detector 80 utilizes the file 10 that exists on the reading surface of combined detection reader of photo-detector and IR sensor circuit.User interface LED (UILED) alarm 90 is set shows working condition.Led array row 35 LED is a solid-state device, can promptly realize control to them with the software that moves on the document reader.If file applications comprise the tape of data, the magnetic card reader 100 that can read four track datas just is set reads these data.
Fig. 5 is the process flow diagram of the step carried out of file controller firmware that expression is handled by document reader.The startup that the file controller software control is carried out by document reader, in this case, which software part it judges in operation, so that handle input and produce required output.Equally, document reader functional is limited to structure and drops on file (that is, being limited to those files that obtain thus handling) within the controller software scope, like this can with the file of document reader and predefined type effectively coupling get up.
When the document detector 80 of reader has detected file and exists, come scanning document by exciting IR, visible and UV led array, so that utilize in visible, IR and the UV irradiation one or more to shine MRZ respectively.As mentioned above, the different LED of these irradiation frequencies row generally is to excite in order, but also can be as required directly (separately) excite.For owing to apply illumination for each scanning that occurs among the file MRZ (promptly visible) image, image sensor (being the CCD40 among Fig. 4) by reader is caught image, send it to main frame, so that (as required) utilizes one or more application software of moving in the main frame that it is handled.File controller Characteristic of Software steady arm positioning parts is also discerned each feature (mark) of document image.Particularly, with reference to Fig. 2, the following mark in the mechanical-readable zone of its location and identification file: visual photo 51; Bar code 52; OCR literal 53; And UV visibility region 1-4.
Utilization is configured to be fit to adopt each software part of the treatment step of wanting to handle dissimilar features by different way.OCR processor 120 is handled OCR feature 53,54 according to traditional treatment step, whereby the OCR-B character line of identification and these features of decipher.Well known to a person skilled in the art to be that the OCR software part preferably includes the format checking treatment step of the error that may occur in linguistic context treatment step and the definite character of being discerned.The decipher character group that 120 outputs of OCR processor are determined by it sends this output to main frame, so that show on display, and/or is for further processing as required.Optionally, output character can change into and directly be sent to (for example, if do not wish to utilize other software application system to carry out relevant treatment) on the electronic console.
PDF417 bar code feature 52 is isolated, analyzed to bar code processor 130, and be its decoding.UV zone 1-5 handles 140 and determines the image of UV zone 1-5, and utilizes aforementioned OCR and PDF software part to handle these images in due course.The magnetic card reader software part preferably is set in addition handles the data that the magnetic card reader 100 by reader reads.As for the output of OCR parts, send the output of each in these software parts to main frame and be for further processing, and/or on monitor, show.
Those skilled in the art can understand each used in previous embodiment electro-optical system and software processes operation well.The technician in photoelectron and image processing field it being understood that and can design various other implementations as an alternative, should expect that these technician can be used to the present invention realize its various application.
Therefore, it being understood that the specific embodiment of describing in this explanation mode by way of example do not attempt to limit the desired protection domain of inventor, and the present invention's scope required for protection is as the criterion with claims scope required for protection.
Claims (20)
1. be used for reading automatically the photoelectricity document reader of first mark in file mechanical-readable zone, described first to be marked at when utilizing radiation of visible light be sightless, and when the invisible light irradiation that utilizes scheduled frequency range, be visible, described reader comprises:
(a) be used for the reading surface of file layout, it comprises the described mechanical-readable zone that will be read by described reader;
(b) a plurality of first light sources, separate on they and described reading surface, and be configured to when starting described first light source, can utilize the invisible light of described scheduled frequency range to shine the described mechanical-readable zone of the lip-deep file of described reading, so that allow described first mark become as seen;
(c) image sensor, it is configured for catching the image of the light definition that focuses on this image sensor, and produces the electronic data of the image of the described seizure of representative;
(d) in the described light path of extending between surface and the described image sensor of reading, it comprises that the light that is configured to define visual usefulness focuses on the lens on the described sensor; And
(e) file controller, it is configured for from the described mark of the described pattern recognition that is captured, and exports the described mark that obtains discerning to show and/or to handle;
Wherein document image is included in when having started described first light source, send and/or described first mark of the light definition of reflecting by described described mechanical-readable zone of reading the above file of surface, by described light path described document image is transferred to described sensor, catches this document image by described sensor.
2. photoelectricity document reader according to claim 1, wherein, described first light source is UVLED, it is configured for sending the light of predetermined ultraviolet frequencies scope, described first mark comprises the UV fluorescent material, and this material is configured to can send visible light with the described rayed of described predetermined ultraviolet frequencies scope the time.
3. photoelectricity document reader according to claim 2, it further comprises, the optical filter among the light path between described lens and the image sensor, described optical filter is configured for removing the reflected light of described first light source.
4. photoelectricity document reader according to claim 3, wherein, described light path is folded up by a plurality of reflecting surfaces in the described light path.
5. photoelectricity document reader according to claim 4, it further is configured for reading automatically second mark in the described mechanical-readable zone, described second is visible when being marked at radiation of visible light, described reader further comprises a plurality of and described secondary light source that separate on the surface of reading, these configurations of light sources become when starting described secondary light source with the described mechanical-readable of radiation of visible light zone, in a single day wherein said secondary light source starts, and described document image just comprises defined described second mark of light that is sent and/or reflected by described mechanical-readable zone.
6. photoelectricity document reader according to claim 5, it further is configured for reading automatically the 3rd mark in the described mechanical-readable zone, described the 3rd mark comprises the character according to OCR standard criterion structure, described reader further comprises separated the 3rd light source in a plurality of and described reading surface, these configurations of light sources become when starting described the 3rd light source, the described mechanical-readable of rayed zone according to the predetermined infrared frequency scope of described OCR standard criterion utilization, in a single day wherein said the 3rd light source starts, and described document image just comprises defined described the 3rd mark of light that is sent and/or reflected by described mechanical-readable zone.
7. photoelectricity document reader according to claim 6, wherein, described secondary light source is visible LED.
8. photoelectricity document reader according to claim 7, wherein, described the 3rd light source is IRLED.
9. photoelectricity document reader according to claim 8, it further comprises the controller of the startup that is configured for controlling described light source.
10. photoelectricity document reader according to claim 9, wherein, described controller structure becomes to be used in order mode and starts described first, second and the 3rd light source.
11. photoelectricity document reader according to claim 10, wherein, described light source is the sequence starting according to described the 3rd light source, described secondary light source and described first light source.
12. photoelectricity document reader according to claim 11, wherein, described light source is drawn together described first light source, second package according to first package and is drawn together described secondary light source, the 3rd package and draw together the mode of described the 3rd light source and arrange, and the described light source of every row is arranged in the uniform irradiation that described mechanical-readable zone can be provided.
13. photoelectricity document reader according to claim 12, wherein, the described exposure intensity that is produced by described light source row is the suitable intensity that can avoid described sensor saturated.
14. photoelectricity document reader according to claim 13, wherein, the peak wavelength of the described irradiation of first light source is 370nm.
15. photoelectricity document reader according to claim 14, wherein, the peak wavelength of the described irradiation of described secondary light source is 650nm.
16. photoelectricity document reader according to claim 15, wherein, the peak wavelength of the described irradiation of described the 3rd light source is 850nm.
17. photoelectricity document reader according to claim 2, wherein, described first mark comprises coded message.
18. the method for first mark in a mechanical-readable zone that is used for reading automatically file, described first is sightless when being marked at radiation of visible light, is visible with the invisible light irradiation of scheduled frequency range the time, and described method comprises:
(a) be provided for the reading surface of file layout, described surface comprises described mechanical-readable zone;
(b) provide a plurality of and described reading surface separated first light source, these configurations of light sources become when described first light source starts, can utilize the invisible light of described scheduled frequency range to shine the described mechanical-readable zone of the lip-deep file of described reading, thereby allow described first mark become as seen;
(c) provide image sensor, it is configured for catching the image by focusing on the light definition on this image sensor, and produces the electronic data of the image of the described seizure of representative;
(d) be provided at the described light path of extending between surface and the described image sensor of reading, this light path comprises the lens that are configured for will the visual light of definition focusing on the described sensor; And
(e) provide file controller, it is configured for from the described mark of the pattern recognition of described seizure, and exports the described mark that is identified to show and/or to handle;
Thus, document image is included in described first light source when starting, defined described first mark of light that sends and/or reflect by the described mechanical-readable zone of the lip-deep described file of described reading, give described sensor by described light path with this document image transfer, utilize described sensor to catch this image.
19. method according to claim 18, described thus first light source is UV LED, it is configured for sending the light of predetermined ultraviolet frequencies scope, described first mark comprises the UV fluorescent material, and this fluorescent material is configured to can send visible light with the described rayed of described predetermined ultraviolet frequencies scope the time.
20. method according to claim 19, it further provides the optical filter that is arranged in the light path between described lens and described image sensor, and described optical filter is configured for removing the reflected light of described first light source.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2,375,577 | 2002-03-07 | ||
| CA002375577A CA2375577C (en) | 2002-03-07 | 2002-03-07 | Optoelectronic document reader for reading uv / ir visible indicia |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1458618A true CN1458618A (en) | 2003-11-26 |
| CN1288892C CN1288892C (en) | 2006-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031069002A Expired - Fee Related CN1288892C (en) | 2002-03-07 | 2003-03-07 | Photoelectric file reader for reading UV/IR visual mark |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP2004127235A (en) |
| CN (1) | CN1288892C (en) |
| AU (1) | AU2003200909B2 (en) |
| CA (1) | CA2375577C (en) |
| DE (1) | DE10309659A1 (en) |
| HK (1) | HK1056941A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100350422C (en) * | 2004-11-16 | 2007-11-21 | 国际商业机器公司 | Apparatus, system, and method for fraud detection using multiple scan technologies |
| CN102203800A (en) * | 2010-01-21 | 2011-09-28 | 计量仪器公司 | Indicia reading terminal including optical filter |
| CN101443692B (en) * | 2006-05-12 | 2012-11-21 | 克瑞尼股份有限公司 | Micro-optic film structure that alone or together with a security document or label projects images spatially coordinated with static images and/or other projected images |
| CN103493064A (en) * | 2011-04-25 | 2014-01-01 | 英迪股份有限公司 | Film on which a code is recorded, reader used for recognizing the film on which a code is recorded, and electronic equipment including a display device to which the film on which a code is recorded is attached |
| CN107301359A (en) * | 2016-04-15 | 2017-10-27 | 手持产品公司 | The forming bar code reader of sight and luminaire with color separated |
| CN109460759A (en) * | 2018-12-26 | 2019-03-12 | 天地融科技股份有限公司 | A kind of reader |
| TWI742451B (en) * | 2018-10-23 | 2021-10-11 | 日商電裝威福股份有限公司 | Information code reading device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070138295A1 (en) * | 2005-12-21 | 2007-06-21 | White Daniel F | Method for authenticating an item |
| US8780206B2 (en) | 2008-11-25 | 2014-07-15 | De La Rue North America Inc. | Sequenced illumination |
| US8265346B2 (en) | 2008-11-25 | 2012-09-11 | De La Rue North America Inc. | Determining document fitness using sequenced illumination |
| US8749767B2 (en) | 2009-09-02 | 2014-06-10 | De La Rue North America Inc. | Systems and methods for detecting tape on a document |
| DE102009044124A1 (en) * | 2009-09-29 | 2011-03-31 | Pharmacontrol Electronic Gmbh | Method and device for detecting information applied to packaging |
| US8408468B2 (en) * | 2010-12-13 | 2013-04-02 | Metrologic Instruments, Inc. | Method of and system for reading visible and/or invisible code symbols in a user-transparent manner using visible/invisible illumination source switching during data capture and processing operations |
| RU2444064C1 (en) * | 2011-02-04 | 2012-02-27 | Общество С Ограниченной Ответственностью "Конструкторское Бюро "Дорс" (Ооо "Кб "Дорс") | Device for viewing security marks on document |
| DE102011082174A1 (en) | 2011-09-06 | 2013-03-07 | Bundesdruckerei Gmbh | Device for mobile recognition of a document |
| US9053596B2 (en) | 2012-07-31 | 2015-06-09 | De La Rue North America Inc. | Systems and methods for spectral authentication of a feature of a document |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269169B1 (en) * | 1998-07-17 | 2001-07-31 | Imaging Automation, Inc. | Secure document reader and method therefor |
-
2002
- 2002-03-07 CA CA002375577A patent/CA2375577C/en not_active Expired - Fee Related
-
2003
- 2003-03-06 DE DE2003109659 patent/DE10309659A1/en not_active Ceased
- 2003-03-07 CN CNB031069002A patent/CN1288892C/en not_active Expired - Fee Related
- 2003-03-07 JP JP2003061594A patent/JP2004127235A/en active Pending
- 2003-03-07 AU AU2003200909A patent/AU2003200909B2/en not_active Ceased
- 2003-12-20 HK HK03109275A patent/HK1056941A1/en not_active IP Right Cessation
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100350422C (en) * | 2004-11-16 | 2007-11-21 | 国际商业机器公司 | Apparatus, system, and method for fraud detection using multiple scan technologies |
| CN101443692B (en) * | 2006-05-12 | 2012-11-21 | 克瑞尼股份有限公司 | Micro-optic film structure that alone or together with a security document or label projects images spatially coordinated with static images and/or other projected images |
| CN102203800A (en) * | 2010-01-21 | 2011-09-28 | 计量仪器公司 | Indicia reading terminal including optical filter |
| US9501678B2 (en) | 2010-01-21 | 2016-11-22 | Honeywell Internations, Inc. | Indicia reading terminal including optical filter |
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| US9292723B2 (en) | 2010-01-21 | 2016-03-22 | Honeywell International Inc. | Indicia reading terminal including optical filter |
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| CN103493064A (en) * | 2011-04-25 | 2014-01-01 | 英迪股份有限公司 | Film on which a code is recorded, reader used for recognizing the film on which a code is recorded, and electronic equipment including a display device to which the film on which a code is recorded is attached |
| CN107301359A (en) * | 2016-04-15 | 2017-10-27 | 手持产品公司 | The forming bar code reader of sight and luminaire with color separated |
| CN107301359B (en) * | 2016-04-15 | 2023-02-21 | 手持产品公司 | Imaging barcode reader with color separated sight and illuminator |
| TWI742451B (en) * | 2018-10-23 | 2021-10-11 | 日商電裝威福股份有限公司 | Information code reading device |
| CN109460759A (en) * | 2018-12-26 | 2019-03-12 | 天地融科技股份有限公司 | A kind of reader |
| CN109460759B (en) * | 2018-12-26 | 2024-02-13 | 天地融科技股份有限公司 | Reader |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2375577A1 (en) | 2003-09-07 |
| HK1056941A1 (en) | 2004-03-05 |
| AU2003200909B2 (en) | 2007-11-01 |
| AU2003200909A1 (en) | 2003-10-02 |
| CA2375577C (en) | 2006-05-02 |
| DE10309659A1 (en) | 2004-01-15 |
| CN1288892C (en) | 2006-12-06 |
| JP2004127235A (en) | 2004-04-22 |
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