Image reading device and image forming apparatus
US-2016065754-A1 · Mar 3, 2016 · US
Method of correcting streaks using exposure modulation and spatially varying TRCs
US8964256B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8964256-B2 |
| Application number | US-11261808-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 30, 2008 |
| Priority date | Apr 30, 2008 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
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Systems and methods are provided for compensating for streak defects in images formed by an image forming device, such as a digital printer. The systems and methods include using both modulation of a raster output scanner (ROS actuation) and spatially varying tone reproduction curve (STRC actuation) in a common control system for improving streak correction. Low spatial frequency large amplitude streak defects are corrected using ROS actuation and high spatial frequency streak defects, as well as any residual low frequency defects, are corrected using STRC actuation.
First claim
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The invention claimed is: 1. A method for compensating for streak defects in images formed by a digital printer having a photoreceptor and a raster output scanner (ROS) device comprising: generating test images on the photoreceptor; sensing the cross-process reflectance of the test images on the photoreceptor; generating reflectance profile data of the test images using the sensed cross-process reflectance; generating low spatial frequency reflectance profile data by low-pas…
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Electricity · mapped topic
Physics · mapped topic
Electricity · mapped topic
- H04N1/4015Primary
Electricity · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8964256B2 cover?
- Systems and methods are provided for compensating for streak defects in images formed by an image forming device, such as a digital printer. The systems and methods include using both modulation of a raster output scanner (ROS actuation) and spatially varying tone reproduction curve (STRC actuation) in a common control system for improving streak correction. Low spatial frequency large amplitud…
- Who is the assignee on this patent?
- Viturro R Enrique, Paul Peter, Xerox Corp
- What technology area does this patent fall under?
- Primary CPC classification H04N1/4015. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).