Patent US1340452A successfully refreshed from Google Patents.
Patent US4694502A successfully refreshed from Google Patents.
US4694502A
Expired / Lapsed
US
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Color image reading apparatus
Assignee: Canon Inc
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Filing: 1986-03-21
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Granted: 1987-09-15
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Expires: 2006-03-21
Abstract
Abstract A multi-color image reading device is described in which plural photoelectric converting means convert the light beam from an original color image into electrical color separation signals, a color identification means produces plural color signals corresponding to colors of the multi-color image according to the plural color separation signals, and correcting means utilizes a particular color signal for correcting other color signals.
Inventors
- 👤 Kunitaka Ozawa
- 👤 Naoki Ayata
- 👤 Hidetoshi Suzuki
- 👤 Seiji Saito
- 👤 Noboru Koumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:50
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/48; H04N1/486; H04N1/488
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A multi-color image reading apparatus comprising: photoelectric converting means for providing plural color separation signals corresponding to plural color-separated light beams from a multi-color image; color identifying means for forming plural color signals, corresponding to colors of said multi-color image, from said plural color separation signals; correcting means for correcting at least one of said color signals, said correcting means being adapted to utilize a color signal of a determined color for correcting other color signals; and expanding means for expanding the color signal of said determined color, wherein the expanded color signal of said determined color is utilized for correcting other color signals.
Claim 2
Dependent Claim
104 words
A multi-color image reading apparatus comprising: photoelectric converting means for providing plural color separation signals corresponding to plural color-separated light beams from a multi-color image; color identifying means for forming plural color signals, corresponding to colors of said multi-color image, from said plural color separation signals; correcting means for correcting at least one of said color signals, said correcting means being adapted to utilize a color signal of a determined color for correcting other color signals; and expanding means for expanding the color signal of said determined color, wherein the expanded color signal of said determined color is utilized for correcting other color signals.
Claim 3
Dependent Claim
24 words
A multi-color image reading apparatus according to claim 1, wherein the color signal of said determined color is utilized for erasing other color signals.
Claim 4
Dependent Claim
27 words
A multi-color image reading apparatus according to claim 1, wherein said other color signals are erased at level-changing points of the color signal of said determined color.
Claim 5
Dependent Claim
28 words
A multi-color image reading apparatus according to claim 1, wherein said expanding means comprises means for delaying the color signal of said determined color for a determined amount.
Claim 6
Dependent Claim
97 words
A multi-color image reading apparatus comprising: photoelectric converting means for providing plural color separation signals corresponding to plural color-separated light beams from a multi-color image; color identifying means for forming plural color signals corresponding to the colors of said multi-color image from said plural color separation signals; delaying means for delaying one of said plural color signals formed by said color identifying means; and correcting means for correcting at least one of said plural color signals, said correcting means responsive to the delayed color signal to erase an erroneous color signal formed by said color identifying means.
Claim 7
Dependent Claim
97 words
A multi-color image reading apparatus comprising: photoelectric converting means for providing plural color separation signals corresponding to plural color-separated light beams from a multi-color image; color identifying means for forming plural color signals corresponding to the colors of said multi-color image from said plural color separation signals; delaying means for delaying one of said plural color signals formed by said color identifying means; and correcting means for correcting at least one of said plural color signals, said correcting means responsive to the delayed color signal to erase an erroneous color signal formed by said color identifying means.
Claim 8
Dependent Claim
29 words
A multi-color image reading apparatus according to claim 5, wherein said correcting means is adapted to utilize a color signal of a determined color for correcting other color signals.
Claim 9
Dependent Claim
34 words
A multi-color image reading apparatus according to claim 5, wherein said correcting means erases an erroneous color signal that is formed at level-changing points of said at least one of said plural color signals.
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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) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |