Multicolor and mixed-mode halftoning
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United States of America Patent
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Oct 5, 1999
Grant Date -
N/A
app pub date -
Jul 3, 1997
filing date -
Nov 15, 1996
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Abstract
A printer driver operates a printer capable of multiple dot-placement geometries or resolutions and multiple inks per color channel. It maps a continuous-tone cyan pixel-component value to continuous-tone light- and dark-cyan values, which it separately halftones to respective binary pixel values that respectively indicate whether an associated pixel will receive light- and dark-cyan ink dots. It similarly generates binary values that respectively indicate whether an associated pixel will receive light- and dark-magenta ink dots. In performing the halftoning, the driver separately performs error diffusion through different interleaved sub-images of the image to be printed so that the error-diffusion process is performed for images whose pixel geometry is that for which the process was designed even though the overall image's pixel geometry is not. The result is a modular, scaleable architecture, in which designs for one ink per channel and/or one dot-placement geometry can be adapted with minimal design effort to multiple inks and dot-placement geometries.
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- 15 United States
- 10 France
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- 5 Korea
- 2 Other
Patent Owner(s)
- SEIKO EPSON CORPORATION
International Classification(s)
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- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Ancin, Hakan | Cupertino, CA | 30 | 898 |
Bhattacharjya, Anoop K | Sunnyvale, CA | 51 | 932 |
Shu, Joseph S | San Jose, CA | 22 | 433 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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