US5761339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and recording medium for separating and composing background and character image data
Assignee: Hitachi Ltd
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Filing: 1995-11-28
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Granted: 1998-06-02
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Expires: 2015-11-28
Abstract
Abstract An image processing method for automatically executing operation steps of repairing a defect of an image of a document which is read by a scanner and changing a background image in a short time and a recording medium for storing them. An image processing method comprising: (a) A step of separating background image data from said image data by processing by a maximum filter for comparing the brightness of each pixel constituting said image data with the brightness of peripheral pixels and replacing it with the maximum brightness; and (b) a step of separating character and figure image data by subtracting the background image data obtained by the above step in (a) from the above image data.
Inventors
- 👤 Nobuo Ikeshoji
- 👤 Tatsuya Yamamoto
- 👤 Toshiro Kamiuchi
- 👤 Nagaharu Hamada
- 👤 Koichi Honda
- 👤 Hiromi Yamakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:00
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/58; H04N1/38
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
An image processing method for processing image data which is obtained by reading a document in which a character and figure drawing is drawn on a background drawing by a scanner, comprising at least the following steps of: (a) separating background image data from said image data by processing a maximum filter for comparing the brightness of each pixel constituting said image data with the brightness of peripheral pixels and replacing it with the maximum brightness; and (b) separating character and figure image data by subtracting said background image data from said image data.
Claim 2
Dependent Claim
94 words
An image processing method for processing image data which is obtained by reading a document in which a character and figure drawing is drawn on a background drawing by a scanner, comprising at least the following steps of: (a) separating background image data from said image data by processing a maximum filter for comparing the brightness of each pixel constituting said image data with the brightness of peripheral pixels and replacing it with the maximum brightness; and (b) separating character and figure image data by subtracting said background image data from said image data.
Claim 3
Dependent Claim
16 words
A recording medium for storing a program of the image processing method stated in claim 1.
Claim 4
Dependent Claim
29 words
An image processing method for composing image data different from said background image data as background image data and said character and figure image data stated in claim 1.
Claim 5
Dependent Claim
107 words
An image processing method for processing image data which is obtained by reading a document in which a character and figure drawing is drawn on a background drawing by a scanner, comprising at least the following steps of: (a) decomposing said image data to data of each color of yellow, magenta, cyan, and black; (b) separating character and figure image data from said image data using the data of at least one color which is obtained by said step of decomposing said image data to data of each color; and (c) separating background image data by subtracting said character and figure image data from said image data.
Claim 6
Dependent Claim
107 words
An image processing method for processing image data which is obtained by reading a document in which a character and figure drawing is drawn on a background drawing by a scanner, comprising at least the following steps of: (a) decomposing said image data to data of each color of yellow, magenta, cyan, and black; (b) separating character and figure image data from said image data using the data of at least one color which is obtained by said step of decomposing said image data to data of each color; and (c) separating background image data by subtracting said character and figure image data from said image data.
Claim 7
Dependent Claim
16 words
A recording medium for storing a program of the image processing method stated in claim 4.
Claim 8
Dependent Claim
113 words
An image processing method for processing image data which is obtained by reading a document in which a character and figure drawing is drawn on a background drawing by a scanner, comprising at least the following steps of: (a) separating background image data from said image data by processing a maximum filter for comparing the brightness of each pixel constituting said image data with the brightness of peripheral pixels and replacing it with the maximum brightness; (b) separating character and figure image data by subtracting said background image data from said image data; and (c) composing said background image data and said character and figure image data which are separated by said steps.
Claim 9
Dependent Claim
113 words
An image processing method for processing image data which is obtained by reading a document in which a character and figure drawing is drawn on a background drawing by a scanner, comprising at least the following steps of: (a) separating background image data from said image data by processing a maximum filter for comparing the brightness of each pixel constituting said image data with the brightness of peripheral pixels and replacing it with the maximum brightness; (b) separating character and figure image data by subtracting said background image data from said image data; and (c) composing said background image data and said character and figure image data which are separated by said steps.
Claim 10
Dependent Claim
16 words
A recording medium for storing a program of the image processing method stated in claim 6.
Claim 11
Dependent Claim
126 words
An image processing method for processing image data which is obtained by reading a document in which a character and figure drawing is drawn on a background drawing by a scanner, comprising at least the following steps of: (a) decomposing said image data to data of each color of yellow, magenta, cyan, and black; (b) separating character and figure image data from said image data using the data of at least one color which is obtained by said step of decomposing said image data to data of each color; (c) separating background image data by subtracting said character and figure image data from said image data; and (d) composing said background image data and said character and figure image data which are separated by said steps.
Claim 12
Dependent Claim
126 words
An image processing method for processing image data which is obtained by reading a document in which a character and figure drawing is drawn on a background drawing by a scanner, comprising at least the following steps of: (a) decomposing said image data to data of each color of yellow, magenta, cyan, and black; (b) separating character and figure image data from said image data using the data of at least one color which is obtained by said step of decomposing said image data to data of each color; (c) separating background image data by subtracting said character and figure image data from said image data; and (d) composing said background image data and said character and figure image data which are separated by said steps.
Claim 13
Dependent Claim
128 words
An image processing method for processing image data which is obtained by reading a document in which a character and figure drawing is drawn on a background drawing by a scanner, comprising at least the following steps of: (a) separating background image data from said image data by processing a maximum filter for comparing the brightness of each pixel constituting said image data with the brightness of peripheral pixels and replacing it with the maximum brightness; (b) separating character and figure image data by subtracting said background image data from said image data; and (c) composing said image data of said document which is read and obtained by said scanner and said background image data and said character and figure image data which are separated by said steps.
Claim 14
Dependent Claim
128 words
An image processing method for processing image data which is obtained by reading a document in which a character and figure drawing is drawn on a background drawing by a scanner, comprising at least the following steps of: (a) separating background image data from said image data by processing a maximum filter for comparing the brightness of each pixel constituting said image data with the brightness of peripheral pixels and replacing it with the maximum brightness; (b) separating character and figure image data by subtracting said background image data from said image data; and (c) composing said image data of said document which is read and obtained by said scanner and said background image data and said character and figure image data which are separated by said steps.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-01 | 2001-12-01 | 2002-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-01 | 2005-12-01 | 2006-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-01 | 2009-12-01 | 2010-06-02 | $7700.00 | Window Closed / Lapsed |