US5101282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable magnification image
Assignee: Canon Inc
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Filing: 1990-03-07
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Granted: 1992-03-31
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Expires: 2010-03-07
Abstract
Abstract An image processing apparatus includes a scanning system for reading a document image, and a scanning system driving unit for relatively moving and scanning the document image and the scanning system. The scanning system is driven in accordance with input drive pulses. The apparatus also includes a control unit for changing the number of drive pulses to be supplied to the scanning system in accordance with an input variable magnification. The scanning system has a CCD for converting the document image into an electric signal.
Inventors
- 👤 Tsuyoshi Honma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:22
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/387; H04N1/393; H04N1/3935; G; G06; G06T; G06T3/00; G06T3/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
237 words
An image processing apparatus comprising: reading means for reading an original image line by line by scanning the original image to output an image signal for each line; drive means for moving a scanning position of said reading means; thinning means for thinning the image signal in units of lines; input means for inputting a variable magnification factor for enlarging or reducing the original image; and control means for discriminating whether the input variable magnification factor is a magnification factor for enlarging the original image or a magnification factor for reducing the original image, and for controlling said drive means and said thinning means in accordance with the discrimination result, wherein, when said control means discriminates that the input variable magnification factor is a magnification factor for enlarging the original image, said control means controls said drive means so as to vary the moving speed of the scanning position in accordance with the input variable magnification factor, and does not permit said thinning means to perform a thinning operation, and when said control means discriminates that the input variable magnification factor is a magnification factor for reducing the original image, said control means controls said thinning means so as to vary the rate of the thinning operation for the image signal in accordance with the input variable magnification factor, and causes said drive means to move the scanning position of said reading means at a constant speed.
Claim 2
Dependent Claim
237 words
An image processing apparatus comprising: reading means for reading an original image line by line by scanning the original image to output an image signal for each line; drive means for moving a scanning position of said reading means; thinning means for thinning the image signal in units of lines; input means for inputting a variable magnification factor for enlarging or reducing the original image; and control means for discriminating whether the input variable magnification factor is a magnification factor for enlarging the original image or a magnification factor for reducing the original image, and for controlling said drive means and said thinning means in accordance with the discrimination result, wherein, when said control means discriminates that the input variable magnification factor is a magnification factor for enlarging the original image, said control means controls said drive means so as to vary the moving speed of the scanning position in accordance with the input variable magnification factor, and does not permit said thinning means to perform a thinning operation, and when said control means discriminates that the input variable magnification factor is a magnification factor for reducing the original image, said control means controls said thinning means so as to vary the rate of the thinning operation for the image signal in accordance with the input variable magnification factor, and causes said drive means to move the scanning position of said reading means at a constant speed.
Claim 3
Dependent Claim
45 words
An apparatus according to claim 1, wherein said drive means is provided with a pulse motor, and said control means changes a period in generation of a pulse signal applied to said pulse motor so as to vary the moving speed of the scanning position.
Claim 4
Dependent Claim
23 words
An apparatus according to claim 2, wherein said reading means has photoelectric conversion means for converting the original image into an electric signal.
Claim 5
Dependent Claim
34 words
An apparatus according to claim 3, further comprising processing means for processing the electric signal output from said photoelectric conversion means and converting the electric signal into a bi-level or multi-level digital image signal.
Claim 6
Dependent Claim
39 words
An apparatus according to claim 1, wherein said control means has a predetermined table indicating a number of lines to be thinned, and said control means causes said thinning means to thin the image signal referring to said table.
Claim 7
Dependent Claim
24 words
An apparatus according to claim 1, wherein said drive means moves said reading means with respect to a stationary location of the original image.
Claim 8
Dependent Claim
23 words
An apparatus according to claim 1, wherein said drive means moves the original image with respect to a stationary of said reading means.
Claim 9
Dependent Claim
40 words
An apparatus according to claim 1, wherein said thinning means comprises memory means for storing the image signal in units of lines and said control means controls said memory means so as to selectively read out the stored image signal.
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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) | 1995-03-31 | 1995-09-30 | 1996-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-31 | 1999-09-30 | 2000-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-31 | 2003-09-30 | 2004-03-31 | $7700.00 | Window Closed / Lapsed |