GB2219855A - Bill discriminating apparatus - Google Patents
Bill discriminating apparatus Download PDFInfo
- Publication number
- GB2219855A GB2219855A GB8912095A GB8912095A GB2219855A GB 2219855 A GB2219855 A GB 2219855A GB 8912095 A GB8912095 A GB 8912095A GB 8912095 A GB8912095 A GB 8912095A GB 2219855 A GB2219855 A GB 2219855A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- detecting means
- signals output
- amplifying
- bills
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012937 correction Methods 0.000 claims description 25
- 239000000306 component Substances 0.000 description 61
- 230000035945 sensitivity Effects 0.000 description 19
- 239000003086 colorant Substances 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 241000272168 Laridae Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/20—Testing patterns thereon
- G07D7/202—Testing patterns thereon using pattern matching
- G07D7/205—Matching spectral properties
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Description
r', , n i, Q r) r- r-.
-- ' -,- i % -, 3 a BILL DISCRIMINATING APPARATUS 1 1 g') n 't Q E: ' t; C T Lhe present invention relates to a note or 'ziJil discr=,inar_ana aDparar-us, and exa=le to such anapparatus canable of discriminatina denominations and/or genuineness of bill's without fail by detecting colors of bills.
There are known bill discriminating apparatuses for disc.-iminating denominations and/or genuineness of bills by is detecting colors of bills.
For example, unexamined Japanese Patent Publication No. 62(1987)-296292 corresponding to the United States patent application Ser. No. 07/056,716 proposes a bill dis criminating apparatus in which a plurality of color sensors are provided in the longitudinal direction of bills being transported, each color sensor comprising a pair of color detecting means for detecting different color components of light transmitted through or reflected by bills from each other, ratios of two kinds of color components detected by the color sensors are calculated in time series to produce time-series patterns of bills and denominations and/or genuineness of bills are discriminated by comparing the thus 2 produced time-series patterns of bills with reference pat terns of bills experimentally obtained and memorized.
n Ithis bill discriminating apparatus, -Awo colors to be detected are selected from three primary colors and the bill discrimination is conducted based upon ratios of the components of two colors contained in light transmitted through or reflected by bills. However, since ratios of the three primary color components contained in light emitted from a light source are not always constant and they change O with elapse of time or change in temperature etc., ratios of the three primary color components contained in light emit ted from the light source and transmitted though or re flected by bills inevitably change with the change in the ratios of the three primary color components contained in light emitted from the light source. Therefore, even if the same portion of the same kind of bills is detected, the ferent detected ratio of the two color components will be dif from that detected previously or at a different temperature.
Further, if the ratios of the.three primary color components contained in light emitted from the light source change with elappse of time or change in temperature etc., the ratios of the three primary color components contained in light emit ted from the light source during detection are inevitably different from that when the reference patterns were pro duced. Accordingly, even if the ratio of two specific color components contained in light transmitted through or re flected by a bill is detected and a pattern of time-series 3 change in this ratio is compared with the ref erence paterns. -:t s;. mDossible to discriminate denominations and/or fqenuineness Oi IIS With SUfA-ciently high accuracy.
1 r, U -..e oresent invention provides a bill discriminating apparatus having light emitting means for emitting light on-zc bills and two color detecting means for selectively and photoelectrically detecting light components contained in light emitted from said light emitting means and trans mitted. through or reflected by the bills to be discriminated and having different wavelengths, each being for outputting signals corresponding to a detected amount of the light component, said bill discriminating apparatus comprising two reference color detecting means for selectively and photo electrically detecting light contained in light emitted from 4 said light emitting means and having different wavelengths, each being for outputting signals corresponding to a detected amount of light, correction value calculating means t for calculating a ratio of signals output from said two reference color detecting means, correction means for cor recting the signals output from one of said two color de tecting means based upon signals output from said correction value calculating means, differential amplifying means for differentially amplifying a difference between signals out put from said correction means and the signals output from the other of said two color detecting means, dividing means for dividing signals output from said differential ampli fying means by the signals output from said other of said two color detecting means and discriminating means for dis criminating denominations and/or genuineness of the bills based upon signals output from said dividing means.
The above and other objects and features of the pre sent invention will become apparent from the following de scription made with reference to an accompanying drawing.
The accon-panying drawing is a schematic block diagram of a bill discriminating apparatus.
Referring to the draWinar a bill discriminating apparatusi is pro vided with a color correction circuit 2, a bill color de tecting circuit 3 and a light emitter 5 f or emitting light to bills B being transported along a bill transporting path 4 so as to scan the bills B line by line. C; The color correction circuit 2 is pr ovided with a correction color sensor 7 for photoelectrically detecting color components contained in light emitted from a light emitter 5 and led by a light transmitting means 6 such as optical fibers.
The correction color sensor 7 comprises a reference green light detecting element 7a and a reference red light detecting element 7b. The reference green light detecting element 7a and the reference red light detecting element 7b have selective sensitivity to the spectra of the green light and the red light and detect only a green light component and a red light component contained in light emitted from the light emitter 5. Each of the reference green light detecting element 7a and the reference red light detecting element 7b can output current corresponding to a detected amount of the light component.
Supposing that the sensitivity to the green light component of the reference green light detecting element 7a is SG,' the sensitivity to the red light component of the reference red light detecting element 7b is SRr the intensi ty of the green light component contained in light emitted from the light emitter 5 is xG and the intensity of the red light component contained in light emitted from__the light emitter 5 is xR, then, current IG output from the reference 6 green light detecting element 7a and current IR Output from the reference red light detecting element 7b will be:
IG CGSGxG.... (1) IR = C RSRxR (2) wherein CG and CR are constants determined by optical char- acteristics of the light transmitting means 6 for transmit ting light emitted from the light emitter 5 to the reference green light detecting element 7a and the reference red light detecting element 7b respectively.
The output currents IGJF IR of the reference green light detecting element 7a and the reference red light detecting element 7b are converted to voltages and amplified by amplifiers 8a and 8b -having gains AG, AR respectively.
The outputs of the amplifiers 8a, 8b are input into a correction value calculating divider 9 where the output of the amplifier Ba is divided by the output of the amplifier 8b, and the correction value calculating divider 9 outputs a voltage VC VC = DCIAGIGIAR'R wherein DC, is a characteristic coefficient of the correc tion value calculating divider 9.
On the other hand, the bill color detecting circuit 3 is provided with a color sensor 10 for photoelectrically detecting light emitted from the light emitter 5 and re flected by the bills being transported along the bill trans porting path 4.
The color sensor 10 comprises a green light detecting element 10a and a red light detecting element 10b. The green 7 light detecting element 10a and the red light detecting element 10b have selective sensitivity to the spectra of the green light and the red light in the same manner as the reference green light detecting element 7a and the reference red light detecting element 7b, and detect only a green light component and a red light component contained in light reflected by the bills B. Each of the green light detecting element 10a and the red light detecting element 10b can output current corresponding to a detected amount of the light component.
Supposing that the sensitivity to the green light component of the green light detecting element 10a is S,, the sensitivity to the red light component of the red light detecting element 10b is S2, the ratio of the green light component to all color components contained in light emitted f rom the light emitter 5 is RG and the ratio of the red light component to all components contained in light emitted from the light emitter 5 is RRI then, current I, output from the green light detecting element 10a and current 12 output from the red light detecting element 10b will be:
l:'-- C1S1XGRG (4) 12 -- C2S2xRRR (5) wherein Cl and C2 are constants determined by arrangements of the light emitter 5, the green light detecting element 10a and the red light detecting element 10b.
The currentsoutput from the green light detecting element 10a and the red light detecting element 10b are It 8 1 converted to voltages and amplified by amplifiers 11a and lib having gains A, and A2 respectively.
Voltage A1I, output from the amplifier lla is input into a correction divider 12 and, on the other hand, the voltage VC output from the correction value calculating divider 9 is also input into the correction divider where the output voltage A1I, of the amplifier lla is divided by the output voltage VC of the correction value calculating divider 9. Then, the correction divider 12 outputs voltage VO.
VO = DC2A1,1ARIR/DC1AGIG (6) wherein DC2 is a characteristic coefficient of the correction divider 12.
The output voltage VO of the correction divider 12 and the output voltage A2,2 of the amplifier 11b are input into a differential amplifier 13 where they are differentially amplified. Then, the differential amplifier 13 outputs voltage V, to a divider 14.
V1 = AD (VO - A2,2) (7) wherein AD is the gain of the differential amplifier 13.
Further, the output voltage A212 is input into the divider 14 where the output voltage V1 of the differential amplifier 13 is divided by the output voltage A212 of the amplifier lib and the divider 14 outputs voltage V to a discriminating means 15.
V = W,/A2,2 = DAD (VO - A2,2)/A2,2 = DAD (DC2A1,1ARIR/DC1AGIG - A2,2)/A2,2 (8) 9 wherein D is a characteristic coefficient of the divider 14.
The thus obtained output voltage V of the divider 14 is f ree f rom the inf luence of change in the ratios of the three primary color components contained in light emitted from the light emitter 5 and depends upon only the ratio of the green light component and the red light component con tained in light reflected by the bills B. if the sensitivity ratio SGISR Of the reference green light detecting element 7a and the reference red light detecting element 7b and the sensitivity ratio SlIS2 of the green light detecting element 10a and the red light detecting element 10b are initially set to be the same.
More specifically, supposing that the formulas (1), (2), (4), (5) and SG/SR = S1/S2 are substituted for the formula (8), then.
V = DAD (JYJMRG/RR - 1) (9) wherein j = A, /A2 K = AR/AG, L = DC2/DC1, M = C R/CG, and N = Cl/C2 Since DAD, J, K, Lt M and N are constants, the output voltage V of the divider 14 is determined by only the ratio RG/RR Of the green light component and the red light compo nent contained in light reflected by the bills. In addition, since the sensitivity SG, SRF S, and S2 of the reference t green light detecting element 7a, the reference red light detecting element 7b, the green light detecting element 10a and the red light detecting element 10b changes similarly with elapse of time or change in temperature etc., their sensitivity ratios of SGISR and SIIS2 are kept constant with elapse of time or change in temperature etc. Therefore, if the sensitivity ratio SG/SR Of the reference green light detecting element 7a and the reference red light detecting element 7b and the sensitivity ratio Sl/S2 of the green light detecting element 10a and the red light detecting element 10b are initially set to be the same, even if the ratios of the three primary color components contained in light emitted from the light emitter 5 change with elapse of time or change in temperature etc., the influence of change in the ratios of the three primary color components con tained in light emitted from the light emitter 5 on the output voltage V of the divider 14 is eliminated and the divider 14 always outputs the voltage V depending upon only the ratio of the green light component and the red light component contained in light reflected by the bills B. Thus, the output voltage V of the divider 14 free from change in the ratios of the three primary color components contained in light emitted from the light emitter 5 is fed to the discriminating means 15 where denominations and gen uineness of the bills B are discriminated.
Reference patterns for respective denominations of the bills B are stored in advance in the discriminating means 15 and the time-series pattern of the signals which have been detected by scanning the bills B line by line by the light emitter 2 and on which the above described signal proces sings have been conducted is compared with the reference par-terns and the denomination 'and the genuineness of the bills 3 are discriminated depending upon agreement between the detected pattern and one of the reference patterns.
S ince even in the case where the ratios of the three primary color comi)onents contained in light emitted from the light emitter change with elapse of time or change in temperature etc., the output of the green light detecting element 10a is corrected by the correction circuit 2 and the difference between the thus corrected output of the green light de tecting element 10a and the output of the red light de tect-ing element 10b is divided by the output of the red light detecting element 10b, it is possible to completely eliminate the influence of the ratios of the three primary color components contained in light emitted f rom the light emitter 5 from the detection signal, whereby the denomina tions and genuineness of bills can be discriminated with sufficiently high accuracy.
As described in detail, it is possi ble to provide a bill discriminating apparatus capable of discriminating denominations and genuineness of bills with out fail by detecting colors of bills.
12 r, A 1 though the light emitted f rom the light emitter 5 is de tected by the reference green light detecting element 7a and the reference red light detecting element 7b which have selective sensitivity to the spectra of the green 11ght comvonent and the red light component and photoelectrically detect only the green light component and the red light component contained in the emitted light, and the light reflected from the bills B is detected by the green light 1 detecting element 7a and the red light detecting element 7b which respectively have selective sensitivity to the spectra of the green light component and the red light component and photoelectrically detect only a green light component and a red component contained in the reflected light from the bills B, specific wavelengths of light can instead be de tected using photoelectrically detecting elements provided with f ilters capable of transmitting the green light compo nent or the red light component on the front face thereof.
Further, although red light and green light are selectively detected among the three primary colors in the color correction circuit 2 and the bill color detecting circuit 3, red light and blue light, green light and blue light or red light, green light 13 and blue light may be selectively detected.
Still further, although the reflected light from the bill B is detected, light zransmitted through the bills B can instead be de 4;-.ected by arranging the light emitter 5 on the opposite side of the color sensor 10 across the bill transporting path 4.
Moreover, although red light and green light are selectively detected among the three primary colors in the color correction circuit 2 and the bill color detecting circuit 3, it is possible to fur ther provide a reference blue light detecting element and a blue light detecting element and to detect and correct a red light component and a green light component, a red light component and a blue light component, and a green light component and a blue light component in parallel in the same manner as the above described construction.
Further, although the reference green light detecting element 7a and the green light detecting element 10a have selective sensitivity to only a green light component and the reference red light detecting element 7b and the red light detecting element 10b have selective sensitivity to only a red light component, even if the former elements have some sensitivity to other light components than the green light component and the latter elements have some sensitivity to other light compo nents than the red light component, if the ratio of the sensitivity characteristics of the reference green light 14 1 detecting element 7a and the green light detecting element!Oa and that of the reference red light detecting element 7b and zhe red light detecting element 10b are set to be same, the same effect can be obtained.
Furthermore, al- thouah the bills B are scanned line by line by light emitted from the light emitter 5, the bills B may be scanned point by Doint by light emitted from the light emitter 5.
v is
Claims (8)
- Claims:S 1. A bill discriminating apparatus having light emitting means f or emitting light onto bills and two color detecting means for selectively and photoelectrically detecting light components contained in light emitted f rom said light emitting means and transmitted through or reflected by the bills to be discriminated and having different wavelengths, each being f or outputting signals corresponding to a detected amount of the light component, said bill discriminating apparatus comprising two reference color detecting means for selectively and photoelectrically detecting light contained in light emitted f rom said light emitting means and having different wavelengths, each being for outputting signals corresponding to a detected amount of light, correction value calculating means f or calculating a ratio of signals output from said two reference color detecting means, correction means for correcting the signals output from one of said two color detecting means based upon signals output from said correction value calculating means, differential amplifying means for differentially amplifying a difference between signals output f rom said correction means and the signals output from the other of said two color detecting means, dividing means for dividing signals output from said differential amplifying means by the signals output from said other of said two color detecting means and discriminating means for discriminating denominations and/or genuineness of the bills based upon signals output from said dividing means.16
- 2. A bill discriminating apparatus in accordance with Claim 1 wherein said two color detecting means comprise green light detecting means and red light detecting means for selectively and photoelectrically detecting a green light component and a red light component contained in the light emitted from said light emitting means and transmitted through or reflected by the bills to be discriminated respectively, and said two reference color detecting means comprise reference green light detecting means and reference red light detecting means for selectively and photoelectrically detecting a green light component and a red light component contained in the light emitted from said light emitting means respectively.
- 3. A bill discriminating apparatus in accordance with Claim 2 which further includes two amplifying means for respectively converting said signals output from said green light detecting means and said red light detecting means to voltages and amplifying them, and two amplifying means for respectively converting said signals output from said reference green light detecting means and said reference red light detecting means to voltages and amplifying them.
- 4. A bill discriminating apparatus in accordance with Claim 1 wherein said two color detecting means comprise red light detecting means and blue light detecting means for selectively and photoelectrically detecting a red light component and a blue light component contained in the light emitted from said light emitting means and transmitted 17 through or reflected by the bills to be discriminated respectively, and said two reference color detecting means comprise reference red light detecting means and reference blue light detecting means for selectively and photoelectrically detecting a red light component and a blue light component contained in the light emitted f ram said light emitting means respectively.
- 5. A bill discriminating apparatus in accordance with Claim 4 which further includes two amplifying means for respectively converting said signals output from said red light detecting means and said blue light detecting means to voltages and amplifying them, and two amplifying means for respectively converting said signals output from said reference red light detecting means and said reference blue light detecting means to voltages and amplifying them.
- 6. A bill discriminating apparatus in accordance with Claim 1 wherein said two color detecting means comprise green light detecting means and blue light detecting means for selectively and photoelectrically detecting a green light component and a blue light component contained in the light emitted from said light emitting means and transmitted through or reflected by the bills to be discriminated respectively, and said two reference color detecting means comprise reference green light detecting means and reference blue light detecting means for selectively and photoelectrically detecting a green light component and a blue light component contained in the light emitted from said light emitting means respectively.18
- 7. A bill discriminating apparatus in accordance with Claim 6 which further includes two amplifying means for respectively converting said signals output J"rom said green light detecting means and said blue light detecting means to voltages and amplifying them, and two amvlifying means for respectively converting said signals output from said reference green light detecting means and said reference blue light detecting means to voltages and amplifying them.- 'i -
- 8. _% _1 disc-r-4manating aiDiDaratus subs tanti al II,.- as herein --escri-i-ed with reference -:o and as shown in the accompanving -r=w1nc:.19 Published 1989 at The Patent Office.State House. 65,71 High Holbor:i. LDndor.WClR4TP. Further copies MaY be obLainedfrorn The PatentOfftce, Sales Branch. St Mary Cray, Orpington. Kent BR5 3RD. Printed by Multiplex techmques ltd. St Max-j Cray. Kent, Con. 1187
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13321488 | 1988-05-31 | ||
| JP1119388A JPH0812709B2 (en) | 1988-05-31 | 1989-05-12 | Bill validator |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8912095D0 GB8912095D0 (en) | 1989-07-12 |
| GB2219855A true GB2219855A (en) | 1989-12-20 |
| GB2219855B GB2219855B (en) | 1992-05-27 |
Family
ID=26457144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8912095A Expired - Lifetime GB2219855B (en) | 1988-05-31 | 1989-05-25 | Bill discriminating apparatus |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3917419A1 (en) |
| GB (1) | GB2219855B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2703783A1 (en) * | 1993-04-05 | 1994-10-14 | Renault Automation | Method for checking the continuity of a bead of product deposited on a surface |
| GB2282445B (en) * | 1992-08-03 | 1997-02-05 | Ricoh Kk | Original-discrimination system for discriminating special documents, and an image forming apparatus and duplicator using the original-discrimination system |
| US5751854A (en) * | 1992-08-03 | 1998-05-12 | Ricoh Company, Ltd. | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system |
| US5855268A (en) * | 1997-10-01 | 1999-01-05 | Mars Incorporated | Optical sensor system for a bill validator |
| GB2355522A (en) * | 1999-10-19 | 2001-04-25 | Innovative Technology Ltd | Improvements in verifying printed security substrates |
| GB2437310A (en) * | 2006-04-19 | 2007-10-24 | Int Currency Tech | Banknote detector and recognition system |
| US7672499B2 (en) | 1990-02-05 | 2010-03-02 | Cummins-Allison Corp. | Method and apparatus for currency discrimination and counting |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3369269B2 (en) * | 1993-01-28 | 2003-01-20 | 株式会社リコー | Image reading device |
| DE19701513C3 (en) * | 1997-01-17 | 2003-12-24 | Hkr Sensorsysteme Gmbh | Test method and test facility for authenticity control of authenticity marks |
| EP0935223A1 (en) | 1998-02-05 | 1999-08-11 | Ascom Autelca Ag | Apparatus for authenticating valuable documents |
| US6269169B1 (en) * | 1998-07-17 | 2001-07-31 | Imaging Automation, Inc. | Secure document reader and method therefor |
| FR2827410B1 (en) * | 2001-07-11 | 2004-02-13 | Banque De France | METHOD FOR AUTHENTICATING A SECURITY DOCUMENT BY MULTI-FREQUENCY ANALYSIS, AND ASSOCIATED DEVICE |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3239995C2 (en) * | 1982-10-28 | 1985-07-25 | COPYTEX GmbH Sicherheitssysteme, 7730 Villingen-Schwenningen | Device for recognizing documents |
| US4881268A (en) * | 1986-06-17 | 1989-11-14 | Laurel Bank Machines Co., Ltd. | Paper money discriminator |
| JPS62296292A (en) * | 1986-06-17 | 1987-12-23 | ロ−レルバンクマシン株式会社 | Paper money discriminator |
| US4947441A (en) * | 1988-05-20 | 1990-08-07 | Laurel Bank Machine Co., Ltd. | Bill discriminating apparatus |
-
1989
- 1989-05-25 GB GB8912095A patent/GB2219855B/en not_active Expired - Lifetime
- 1989-05-29 DE DE3917419A patent/DE3917419A1/en active Granted
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7672499B2 (en) | 1990-02-05 | 2010-03-02 | Cummins-Allison Corp. | Method and apparatus for currency discrimination and counting |
| GB2282445B (en) * | 1992-08-03 | 1997-02-05 | Ricoh Kk | Original-discrimination system for discriminating special documents, and an image forming apparatus and duplicator using the original-discrimination system |
| US5751854A (en) * | 1992-08-03 | 1998-05-12 | Ricoh Company, Ltd. | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system |
| US6272248B1 (en) | 1992-08-03 | 2001-08-07 | Ricoh Company, Ltd. | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system |
| FR2703783A1 (en) * | 1993-04-05 | 1994-10-14 | Renault Automation | Method for checking the continuity of a bead of product deposited on a surface |
| US5855268A (en) * | 1997-10-01 | 1999-01-05 | Mars Incorporated | Optical sensor system for a bill validator |
| GB2355522A (en) * | 1999-10-19 | 2001-04-25 | Innovative Technology Ltd | Improvements in verifying printed security substrates |
| GB2437310A (en) * | 2006-04-19 | 2007-10-24 | Int Currency Tech | Banknote detector and recognition system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8912095D0 (en) | 1989-07-12 |
| DE3917419C2 (en) | 1991-09-05 |
| GB2219855B (en) | 1992-05-27 |
| DE3917419A1 (en) | 1989-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5027415A (en) | Bill discriminating apparatus | |
| US4947441A (en) | Bill discriminating apparatus | |
| EP0069893B1 (en) | A printed matter identifying apparatus and method | |
| EP0083062B1 (en) | Apparatus for inspecting printed matters | |
| US4881268A (en) | Paper money discriminator | |
| GB2219855A (en) | Bill discriminating apparatus | |
| EP0806018B1 (en) | Optical interface circuit and method for optical sensor system | |
| EP0668576B2 (en) | Bill discriminating apparatus for bill handling machine | |
| US6529269B1 (en) | Paper sheet identification method and device | |
| EP1066602B1 (en) | Methods and apparatus for monitoring articles | |
| GB1531312A (en) | Note discriminating apparatus | |
| US6274873B1 (en) | Spectrum analyzer for reading authentication marks | |
| US4184081A (en) | Method for checking banknotes and apparatus therefor | |
| US4833529A (en) | Color image processing system with a color separating circuit which produces a color image signal in response to a status signal from a color identifying circuit | |
| JPH0833938B2 (en) | Bill validator | |
| JPS60230290A (en) | Discriminator for print | |
| JPH10185690A (en) | Two-color sensor device | |
| RU1784844C (en) | Device for color marks identifying | |
| JPS62111376A (en) | Optical identification system for paper money | |
| JPS60186722A (en) | Simple color discriminating device | |
| GB2064101A (en) | Apparatus for identifying Sheet-like Printed Matters | |
| JPS5850391B2 (en) | Authenticity determination method for printed matter | |
| JP2005122392A (en) | Paper sheet fluorescence detecting device | |
| JPS5836070A (en) | Optical reader | |
| JPS61202127A (en) | Color identifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Expiry date: 20090524 |