Patent US6748102B2 successfully refreshed from Google Patents.
US6748102B2
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Document alteration indicating system and method
Assignee: Google LLC
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Filing: 2001-01-24
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Granted: 2004-06-08
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Expires: 2021-01-24
Abstract
Abstract A system and method for detecting alteration of a document. The invention evaluates markings in half-tone fields by ascertaining a first dot count of dots isolated from the marking in the half-tone field of the document; forming an image of the marking; superimposing the image on a blank half-tone field having the same predetermined pattern as the half-tone field of the document; ascertaining a second dot count of dots isolated from the image superimposed on the blank half-tone field; and determining whether the marking has been altered by comparing the first dot count to the second dot count. An alteration is indicated where the first dot count and second dot count are different.
Inventors
- 👤 Ravi Prakash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:36
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06Q; G06Q20/00; G06Q20/04; G06Q20/042; G07; G07D; G07D7/00; G07D7/20
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
128 words
A method of detecting alteration of a marking in a half-tone field of a document, the half-tone field having a predetermined pattern, the method comprising the steps of: ascertaining a first dot count of dots isolated from the marking in the half-tone field of the document; forming an image of the marking; superimposing the image on a blank half-tone field having the same predetermined pattern as the half-tone field of the document; ascertaining a second dot count of dots isolated from the image superimposed on the blank half-tone field; and determining whether the marking has been altered by comparing the first dot count to the second dot count, wherein an alteration of the marking is indicated when the first dot count is different than the second dot count.
Claim 2
Independent Claim
128 words
A method of detecting alteration of a marking in a half-tone field of a document, the half-tone field having a predetermined pattern, the method comprising the steps of: ascertaining a first dot count of dots isolated from the marking in the half-tone field of the document; forming an image of the marking; superimposing the image on a blank half-tone field having the same predetermined pattern as the half-tone field of the document; ascertaining a second dot count of dots isolated from the image superimposed on the blank half-tone field; and determining whether the marking has been altered by comparing the first dot count to the second dot count, wherein an alteration of the marking is indicated when the first dot count is different than the second dot count.
Claim 3
Dependent Claim
24 words
The method of claim 1 , wherein the steps of ascertaining dot counts include conducting an isolated dot removal of the respective half-tone field.
Claim 4
Dependent Claim
27 words
The method of claim 1 , wherein the step of forming an image of the marking includes converting the half-tone field to a black and white image.
Claim 5
Dependent Claim
28 words
The method of claim 1 , wherein the step of superimposing the image on a blank half-tone field includes converting the blank half-tone field to black and white.
Claim 6
Dependent Claim
26 words
The method of claim 1 , further comprising the step of determining the predetermined pattern of the half-tone field by obtaining an identifier from the document.
Claim 7
Dependent Claim
36 words
The method of claim 5 , further comprising the step of verifying the predetermined pattern by digitizing a blank document, converting the digitized blank document to black and white and ascertaining a count of dots thereon.
Claim 8
Dependent Claim
30 words
The method of claim 1 , wherein an alteration of the marking is indicated when the first dot count is different than the second dot count by a preset variant.
Claim 9
Dependent Claim
28 words
The method of claim 1 , wherein the half-tone field includes at least one of a payee name field, a curtsey amount field and a legal amount field.
Claim 10
Independent Claim
115 words
A system for indicating alteration of a marking of a document half-tone field, the document half-tone field having a predetermined pattern, the system comprising: a dot counter for counting isolated dots of a half-tone field; an imager for forming an image of the marking of the document half-tone field; a superimposer for superimposing the image on a blank half-tone field having the same predetermined pattern as the document half-tone field; a comparator for comparing a first dot count of the document half-tone field to a second dot count of the blank half-tone field with the image superimposed thereon, wherein an alteration is indicated when the first dot count is different than the second dot count.
Claim 11
Independent Claim
115 words
A system for indicating alteration of a marking of a document half-tone field, the document half-tone field having a predetermined pattern, the system comprising: a dot counter for counting isolated dots of a half-tone field; an imager for forming an image of the marking of the document half-tone field; a superimposer for superimposing the image on a blank half-tone field having the same predetermined pattern as the document half-tone field; a comparator for comparing a first dot count of the document half-tone field to a second dot count of the blank half-tone field with the image superimposed thereon, wherein an alteration is indicated when the first dot count is different than the second dot count.
Claim 12
Dependent Claim
20 words
The system of claim 9 , further comprising a black-white converter for converting a half-tone field to black and white.
Claim 13
Dependent Claim
27 words
The system of claim 10 , wherein the dot counter includes an isopixel removal system for removing dots from a half-tone field and counting the removed dots.
Claim 14
Dependent Claim
29 words
The system of claim 9 , wherein the document half-tone field includes at least one of a payee name field, a curtsey amount field and a legal amount field.
Claim 15
Dependent Claim
22 words
A document processing system comprising the system for indicating alteration of a marking of a document half-tone field of claim 9 .
Claim 16
Dependent Claim
20 words
A workstation comprising the system for indicating alteration of a marking of a document half-tone field of claim 9 .
Claim 17
Dependent Claim
136 words
A computer program product comprising a computer useable medium having computer readable program code embodied therein for indicating an alteration of a marking on a document half-tone field, the document half-tone field having a predetermined pattern, the computer program product comprising: program code configured to count isolated dots of a half-tone field; program code configured to form an image of the marking of the document half-tone field; program code configured to superimpose the image on a blank half-tone field having the same predetermined pattern as the document half-tone field; and program code configured to compare a first dot count of the document half-tone field to a second (lot count of the blank half-tone field with the image superimposed thereon, wherein an alteration is indicated when the first dot count is different than the second dot count.
Claim 18
Dependent Claim
136 words
A computer program product comprising a computer useable medium having computer readable program code embodied therein for indicating an alteration of a marking on a document half-tone field, the document half-tone field having a predetermined pattern, the computer program product comprising: program code configured to count isolated dots of a half-tone field; program code configured to form an image of the marking of the document half-tone field; program code configured to superimpose the image on a blank half-tone field having the same predetermined pattern as the document half-tone field; and program code configured to compare a first dot count of the document half-tone field to a second (lot count of the blank half-tone field with the image superimposed thereon, wherein an alteration is indicated when the first dot count is different than the second dot count.
Claim 19
Dependent Claim
23 words
The program product of claim 14 , further comprising program code configured to convert a half-tone field and marking to black and white.
Claim 20
Dependent Claim
32 words
The program product of claim 14 , wherein the program code configured to count dots includes an isopixel removal system for removing dots from a half-tone field and counting the removed dots.
Claim 21
Dependent Claim
30 words
The program product of claim 14 , wherein the document half-tone field includes at least one of a payee name field, a curtsey amount field and a legal amount field.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-06-08 | 2007-12-08 | 2008-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-06-08 | 2011-12-08 | 2012-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-06-08 | 2015-12-08 | 2016-06-08 | $7700.00 | Window Closed / Lapsed |