US4833544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image processing apparatus
Assignee: Canon Inc
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Filing: 1986-12-23
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Granted: 1989-05-23
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Expires: 2006-12-23
Abstract
Abstract An image processing apparatus is capable of reading an original image with an arbitrary image magnification, by projecting an original image onto a linear image sensor through an optical system of a variable image magnification, and moving the original image with respect to the image sensor with a speed corresponding to the selected image magnification of the optical system.
Inventors
- 👤 Yuichi Sato
- 👤 Tokuichi Tsunekawa
- 👤 Akira Hiramatsu
- 👤 Makoto Katsuma
- 👤 Shigeki Yamada
- 👤 Takeshi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:13
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/387; H04N1/393; H04N1/3935; G; G06; G06T; G06T3/00; G06T3/40; H04N1/04; H04N1/047; H04N1/0473; H04N1/10; H04N1/1008; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N2201/00; H04N2201/04; H04N2201/0402; H04N2201/0404; H04N2201/0406; H04N2201/047; H04N2201/04753; H04N2201/04756
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
An image scanning apparatus comprising: image scanning means for scanning an original image; moving means for moving an image scanning position of said image scanning means by using a stepping motor; determining means for determining numbers of pulses to be supplied to said stepping motor so as to move the image scanning position of said image scanning means from a reference position to a plurality of respective scanning positions in accordance with an image scanning magnification; and control means for controlling a supplying of the pulses to said stepping motor on the basis of the numbers of pulses determined by said determining means.
Claim 2
Dependent Claim
103 words
An image scanning apparatus comprising: image scanning means for scanning an original image; moving means for moving an image scanning position of said image scanning means by using a stepping motor; determining means for determining numbers of pulses to be supplied to said stepping motor so as to move the image scanning position of said image scanning means from a reference position to a plurality of respective scanning positions in accordance with an image scanning magnification; and control means for controlling a supplying of the pulses to said stepping motor on the basis of the numbers of pulses determined by said determining means.
Claim 3
Dependent Claim
58 words
An image scanning apparatus according to claim 1, wherein said control means comprises counting means for counting the number of pulses to be supplied to said stepping motor and controls the supplying of the pulses on the basis of the numbers of pulses determined by said determining means and the number of pulses counted by said counting means.
Claim 4
Dependent Claim
36 words
An image scanning apparatus according to claim 2, wherein said control means comprises comparison means for comparing the numbers of pulses determined by said determining means with the number of pulses counted by said counting means.
Claim 5
Dependent Claim
20 words
An image scanning apparatus according to claim 1, wherein said control means enables and disables the supplying of the pulses.
Claim 6
Dependent Claim
25 words
An image scanning apparatus according to claim 1, wherein said image scanning means comprises a line sensor which scans the original image line by line.
Claim 7
Dependent Claim
30 words
An image scanning apparatus according to claim 5, wherein said moving means moves the scanning position in a direction substantially perpendicular to a main scanning direction of said line sensor.
Claim 8
Dependent Claim
40 words
An image scanning apparatus according to claim 1, further comprising generating means for generating the pulses at a constant period, and wherein said control means controls the supplying of the pulses generated by said generating means to said stepping motor.
Claim 9
Dependent Claim
18 words
An image scanning apparatus according to claim 1, wherein said scanning means scans the image on a film.
Claim 10
Dependent Claim
16 words
An image scanning apparatus according to claim 1, wherein said moving means moves the original image.
Claim 11
Dependent Claim
47 words
An image scanning apparatus according to claim 1, wherein said determining means determines the numbers of pulses to be supplied to said stepping motor on the basis of the image scanning magnification and the number of pulses used for moving the scanning position during an equimagnification reading.
Claim 12
Dependent Claim
25 words
An image scanning apparatus according to claim 1, further comprising projecting means for projecting the original image onto said scanning means with variable image magnification.
References Cited (Backward Citations)
US4423439A
Cited
US4663672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |