Patent US5408329A successfully refreshed from Google Patents.
US5408329A
Expired / Lapsed
US
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Image enhancement through digital darkness control
Assignee: Xerox Corp
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Filing: 1992-09-08
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Granted: 1995-04-18
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Expires: 2012-09-08
Abstract
Abstract A printing machine having an imaging surface, a scanning system for modulating a beam and scanning an image onto the imaging surface, a device to designate a variable relative darkness factor, a store for holding a partial array of the image to be reproduced, a comparator for relating the partial array of the image to be reproduced with standard reference formats to produce correlation signals, modulating logic responsive to the correlation signals and the variable relative darkness factor to provide timing adjustments and a modulator for modulating the beam and scanning the image onto the imaging surface in response to the timing adjustments.
Inventors
- 👤 Louis D. Mailloux
- 👤 Brendan C. Casey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:15
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40025; H04N1/40037; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1204; G06K15/1223; G06K2215/00; G06K2215/0002; G06K2215/0062; G06K2215/0071; G06K2215/0077
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
216 words
A method of reproducing an image in a printing machine having a moving imaging surface and a projecting system for modulating a beam and projecting an image onto the imaging surface for transfer of the image to a medium, the beam being scanned in a first direction, the imaging surface being moved in a second direction, the printing machine including an operator interface to enable a setting of a predetermined copy quality condition of the image to be transferred to the medium, the image including an array of pixels, each pixel representing an image area, each pixel being represented by either a first state or a second state, comprising the steps of; holding in a memory a matrix of pixels of the image, one of the pixels being a target pixel, the target pixel being in said first state, recognizing a state of the target pixel and pixels surrounding the target pixel, detecting the setting of the copy quality condition of the image, and responding to the state of the target pixel and the pixels surrounding the target pixel and to the setting of the copy quality condition to change a state of a portion of the target pixel to said second state, the change being in relation to either the first direction or second direction.
Claim 2
Independent Claim
216 words
A method of reproducing an image in a printing machine having a moving imaging surface and a projecting system for modulating a beam and projecting an image onto the imaging surface for transfer of the image to a medium, the beam being scanned in a first direction, the imaging surface being moved in a second direction, the printing machine including an operator interface to enable a setting of a predetermined copy quality condition of the image to be transferred to the medium, the image including an array of pixels, each pixel representing an image area, each pixel being represented by either a first state or a second state, comprising the steps of; holding in a memory a matrix of pixels of the image, one of the pixels being a target pixel, the target pixel being in said first state, recognizing a state of the target pixel and pixels surrounding the target pixel, detecting the setting of the copy quality condition of the image, and responding to the state of the target pixel and the pixels surrounding the target pixel and to the setting of the copy quality condition to change a state of a portion of the target pixel to said second state, the change being in relation to either the first direction or second direction.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein the step of changing the state of a portion of the target pixel from said first state to said second state includes a step of adjusting a timing of the modulating of the beam.
Claim 4
Dependent Claim
32 words
The method of claim 2 wherein the first state is white and the second state is black including a step of changing a portion of the target pixel from white to black.
References Cited (Backward Citations)
US4450483A
Cited
US4437122A
Cited
US4437122B1
Cited
US4633327A
Cited
US4926268A
Cited
US4686542A
Cited
US4680645A
Cited
US4847641A
Cited
US4970554A
Cited
US5045952A
Cited
US5299308A
Cited
US5050000A
Cited
US5081494A
Cited
US5258775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |