WO2001088860B1 - Method and device - Google Patents
Method and deviceInfo
- Publication number
- WO2001088860B1 WO2001088860B1 PCT/SE2001/001077 SE0101077W WO0188860B1 WO 2001088860 B1 WO2001088860 B1 WO 2001088860B1 SE 0101077 W SE0101077 W SE 0101077W WO 0188860 B1 WO0188860 B1 WO 0188860B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mark
- statistics
- quality
- determination
- test
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
-
- 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
- G07D7/003—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 security elements
- G07D7/0034—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 security elements using watermarks
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2201/00—General purpose image data processing
- G06T2201/005—Image watermarking
- G06T2201/0065—Extraction of an embedded watermark; Reliable detection
Abstract
The invention concerns a method and a device for quality examination of through radiated security elements (16, 22) comprised in a valuable document by image analysis processing for the determination of its quality, dimensions and internal distances. The security element may specifically be a watermark. The quality of the security element (16, 22) is determined via statistical analysis, whereby this is determined via previously obtained statistics and via threshold values.
Claims
1. A method for quality inspection of through radiated security elements (16, 22), security marks and areas in the vicinity of such comprised in valuable documents, by image processing analysis via computer means for the determination of its quality, at manufacturing, whereby a mark (16, 22) is through radiated and the radiation passing the mark is registered by means of digital means for receiving transmitted radiation, characterised in the steps : determination of statistics for different values by analysing the mark, if it is a reference mark (22) , in comparison with an original mark, design mark (18) , whereby the statistics is used for quality check of test marks (16) , storing of produced statistics for the reference mark (22) and of the reference mark per se (22) , determination of differences in the radiation transmittance between the reference mark (22) and the test mark (16) within a mask (20) for defined areas of the marks (16, 22) where the difference is pronounced in comparison with acceptable statistics for acceptable differences .
2. A method according to claim 1, characterised in the step: statistical determination of differences between the reference mark (22) and the test mark (16) by comparison of the same with said produced statistics for quality determination of the test mark (16) in said areas .
3. A method according to claim 1, characterised in the step: determining if the test mark (16) has approved quality from a predetermined threshold level for
differences in the statistics between the reference mark (22) and the test mark (16) .
4. A method according to claim 3 , characterised in the step: communication of said differences in the statistics and possible acceptance or rejection of the quality of the mark .
5. A method according to any one of the previous claims, characterised in that rejection of the quality of the mark is performed if its rotation in relation to said mask (20) exceeds a predetermined rotation threshold value in degrees according to said predetermined statistics.
6. A method according to any one of the previous claims, characterised in that rejection of the quality of the mark is performed if the shrinking factor of a mark differs in relation to the predetermined statistics.
7. A method according to any one of the previous claims, characterised in that the statistics is used for checking the distance between marks in a row of valuable paper at manufacturing thereof in a machine for this purpose.
8. A method according to any one of the previous claims, characterised in that the statistics is used for checking the distance between marks in a row of valuable paper in the so-called machine direction.
9. A method according to any one of the previous claims, characterised in that the statistics is used for checking the distance between marks in a row of valuable paper cross wise the machine direction to the row in front.
37
10. A method according to any one of the previous claims 1- 8, characterised in that the statistics is used for checking the distance between marks in a row of valuable paper in the so called machine direction and cross wise the machine direction to the row in front .
11. A method according to any one of the previous claims, characterised in that the mark is a watermark.
12. A method according to any one of the previous claims, characterised in that the mark is analysed for at least two different wavelengths of light so that at least two formation indexes is obtained for statistical determination of a quality of a mark.
13. A method according to any one of the previous claims, characterised in that statistics is produced when a reference mark is registered, whereby a mark to be tested immediately may be registered for quality determination with the statistics for the reference mark.
14. A device for quality inspection of through radiated security elements, security marks and areas in the vicinity of such comprised in valuable documents by image processing analysis via computer means for the determination of its quality, at manufacturing, wherein the device comprises means for the through radiation of a reference mark (22) or a test mark (16), the passing radiation is registered by digital means for receiving incident radiation, which means is connected or connectable to the computer means for analysing of a quality of a test mark (16) , characterised in: analysis means for determination of statistics for different values by analysis of the mark, if it is a
reference mark (22), compared to an original, design mark (18), whereby the statistics are used for quality check of test marks (16) , digital storing means for produced statistics for the reference mark (22) and of the reference mark (22) per se, determination means for determination of differences in the radiation transmittance between the reference mark (22) and the test mark (16) within a mask (20) for defined areas of the mark (16, 22) where the difference is pronounced in comparison with statistics over acceptable differences.
15. A device according to claim 14, characterised in statistical means for calculation of the difference and for comparison of the same with said statistics for quality determination of the test mark (16) in said area.
16. A device according to claim 14, characterised in determination means for determining if the mark is approved from a predetermined threshold level for differences in the statistics .
17. A device according to claim 16, characterised in communication means for communication of said differences in the statistics and possible acceptance or rejection of the quality of the test mark (16) .
18. A device according to claim 14-17, characterised in that the mark is a watermark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2001260894A AU2001260894A1 (en) | 2000-05-16 | 2001-05-15 | Method and device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0001795-4 | 2000-05-16 | ||
| SE0001795A SE516421C2 (en) | 2000-05-16 | 2000-05-16 | Method and apparatus for quality inspection of light-transparent safety elements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2001088860A1 WO2001088860A1 (en) | 2001-11-22 |
| WO2001088860B1 true WO2001088860B1 (en) | 2002-02-28 |
Family
ID=20279680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE2001/001077 WO2001088860A1 (en) | 2000-05-16 | 2001-05-15 | Method and device |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2001260894A1 (en) |
| SE (1) | SE516421C2 (en) |
| WO (1) | WO2001088860A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6766045B2 (en) | 2002-03-11 | 2004-07-20 | Digital Verification Ltd. | Currency verification |
| JP2004280188A (en) * | 2003-03-12 | 2004-10-07 | Omron Corp | Valuable medium processing device |
| WO2008149051A1 (en) | 2007-06-06 | 2008-12-11 | De La Rue International Limited | Apparatus for analysing a security document |
| WO2008149050A1 (en) | 2007-06-06 | 2008-12-11 | De La Rue International Limited | Apparatus for analysing a security document |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5729623A (en) * | 1993-10-18 | 1998-03-17 | Glory Kogyo Kabushiki Kaisha | Pattern recognition apparatus and method of optimizing mask for pattern recognition according to genetic algorithm |
| AU1324895A (en) * | 1994-01-04 | 1995-08-01 | Mars, Incorporated | Detection of counterfeits objects, for instance counterfeits banknotes |
| WO1997027566A1 (en) * | 1996-01-25 | 1997-07-31 | Sanyo Electric Co., Ltd. | Judging method of sheets, notes, etc. for forgery, and judging method of insertion direction of them |
| JP3741777B2 (en) * | 1996-04-15 | 2006-02-01 | グローリー工業株式会社 | Paper sheet identification method |
| IT1292830B1 (en) * | 1997-03-28 | 1999-02-11 | Gd Spa | METHOD AND DEVICE FOR THE CONTROL OF VALUABLE OR SECURITY OBJECTS IN PARTICULAR BANKNOTES. |
| JPH1198344A (en) * | 1997-09-19 | 1999-04-09 | Mitsubishi Electric Corp | Method and device for discriminating fraudulent alteration of digital image by using electronic watermark |
| JPH11351962A (en) * | 1998-06-12 | 1999-12-24 | Fuji Electric Co Ltd | Optical density detector for sheet and the like media |
-
2000
- 2000-05-16 SE SE0001795A patent/SE516421C2/en not_active IP Right Cessation
-
2001
- 2001-05-15 WO PCT/SE2001/001077 patent/WO2001088860A1/en active Application Filing
- 2001-05-15 AU AU2001260894A patent/AU2001260894A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU2001260894A1 (en) | 2001-11-26 |
| SE0001795D0 (en) | 2000-05-16 |
| SE516421C2 (en) | 2002-01-15 |
| WO2001088860A1 (en) | 2001-11-22 |
| SE0001795L (en) | 2001-11-17 |
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