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US5224176A
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Automated coin grading system
Assignee: Professional Coin Grading Service Inc
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Filing: 1992-07-01
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Granted: 1993-06-29
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Expires: 2012-07-01
Abstract
Abstract A method and system for automated grading of coins involves alignment of a target image of the coin with a reference image by mechanically moving the coin until the target and reference images are aligned, capture of multiple images of the coin under a variety of lighting conditions, and subsequent grading using an expert script made up of individual directives which can be arranged to form different scripts for different grading standards and types of coins to be graded. The system and method provide for identification of the criteria used by an expert in grading an object such as a coin, capture of those criteria, and applying the criteria to the grading of the coin in a manner which is implementable on low-cost and widely available microcomputer hardware. The process by which the system is used to identify and test the criteria for evaluating the coin is interactive, and thus, structural changes need not be made in the system in order to grade the different types of coins or apply different coin grading standards.
Inventors
- 👤 Louis M. Crain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:52
CPC Classifications
G; G06; G06T; G06T7/00; G06T7/0002; G06T7/0004; G06T7/001; G06T7/30; G06T7/33; G06T7/70; G06T7/73; G07; G07D; G07D5/00; G07D5/005; G07D5/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
170 words
A method of developing a system for automated grading of a coin image, comprising the steps of: a. interviewing at least one expert numismatist to determine the process by which the numismatist grades coins; b. providing directives each of which contains a command to form an electronic imaging processing or scoring operation using appropriate corresponding variables, and storing said directives in a computer memory; c. retrieving said directives from said memory and arranging a set of selected directives into a script based on interviews of said numismatist; d. testing the script by causing a computer to execute the directives in the script in order to electronically process an electronic image of a coin and thereby grade the coin; e. comparing the grade obtained by said computer upon executing the directives in said script with a grade determined manually by said numismatist; f. varying said script by retrieving said directives from said memory and arranging a second set of selected directives into a second script; g. repeating steps d and e.
Claim 2
Independent Claim
170 words
A method of developing a system for automated grading of a coin image, comprising the steps of: a. interviewing at least one expert numismatist to determine the process by which the numismatist grades coins; b. providing directives each of which contains a command to form an electronic imaging processing or scoring operation using appropriate corresponding variables, and storing said directives in a computer memory; c. retrieving said directives from said memory and arranging a set of selected directives into a script based on interviews of said numismatist; d. testing the script by causing a computer to execute the directives in the script in order to electronically process an electronic image of a coin and thereby grade the coin; e. comparing the grade obtained by said computer upon executing the directives in said script with a grade determined manually by said numismatist; f. varying said script by retrieving said directives from said memory and arranging a second set of selected directives into a second script; g. repeating steps d and e.
Claim 3
Dependent Claim
91 words
A method as claimed in claim 1, wherein step e comprises the step of using a script to process and grade a large number of randomly sampled coins previously and independently graded by a plurality of numismatists to provide subgrades for each of the characteristics known to effect the grade of a coin and step e comprises the step of analyzing results of said comparison in constructing a set of target answers based on a weighted averaging of the results of said previous and independent grading by a plurality of numismatists.
Claim 4
Dependent Claim
48 words
A method as claimed in claim 2, wherein step d further comprises the step of using a step-wise linear regression to define optimum weights between the metrics so as to maximize the correlation value of the prediction to the target values across a set of said sampled coins.
Claim 5
Dependent Claim
105 words
A method as claimed in claim 1 wherein step e further comprises the steps of: using multi-dimensional optimization to maximize correlation to the target answers by defining in a spreadsheet the methodologies for combining the results of electronic scoring operations, said results defining metrics; placing the results into the spreadsheet; defining initial values for a set of parameters; using a first parameter to define a table of correlation results as that parameter is varied form one value to another in a series of steps; assigning the first parameter a value within a range that maximizes correlation; and repeating the same process for a second parameter.
Claim 6
Dependent Claim
21 words
A method as claimed in claim 4, wherein an optimum starting location for multidimensional optimization is defined by using genetic algorithms.
References Cited (Backward Citations)
US4191472A
Cited
US4309111A
Cited
US4811040A
Cited
US5067162A
Cited
US4899392A
Cited
US5133019A
Cited
US5119438A
Cited
US5067166A
Cited
US5020112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |