US6072906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image data processing apparatus
Assignee: Canon Inc
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Filing: 1997-07-28
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Granted: 2000-06-06
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Expires: 2017-07-28
Abstract
Abstract An image data processing apparatus comprises output means for outputting an image data for each pixel and compression means for compressing the image data supplied from the output means to an image data of a predetermined number of bits. The compression means compresses the image data in accordance with a dot pattern having a predetermined number of tone levels.
Inventors
- 👤 Hiroaki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:18
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40087
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
155 words
An image processing method comprising the steps of: selecting one output device from a plurality of different types of output devices, at least two of the types of output devices having respectively different tonality characteristics on multi-level data, wherein each of the multi-level data is represented by a plurality of bits; selecting, from a plurality of conversion tables stored in advance, a conversion table which is used for converting multi-level data and that corresponds to the type of the selected output device; converting values of input multi-level data represented by a plurality of bits into corresponding values of output multi-level data represented by a plurality of bits using the selected conversion table, the selected conversion table causing the output multi-level data to be reproducible by the selected output device as an image of high tonality; and outputting the output multi-level data to the selected output device to be reproduced as the image of high tonality.
Claim 2
Dependent Claim
155 words
An image processing method comprising the steps of: selecting one output device from a plurality of different types of output devices, at least two of the types of output devices having respectively different tonality characteristics on multi-level data, wherein each of the multi-level data is represented by a plurality of bits; selecting, from a plurality of conversion tables stored in advance, a conversion table which is used for converting multi-level data and that corresponds to the type of the selected output device; converting values of input multi-level data represented by a plurality of bits into corresponding values of output multi-level data represented by a plurality of bits using the selected conversion table, the selected conversion table causing the output multi-level data to be reproducible by the selected output device as an image of high tonality; and outputting the output multi-level data to the selected output device to be reproduced as the image of high tonality.
Claim 3
Dependent Claim
14 words
A method according to claim 1, wherein said multi-level data is coded image data.
Claim 4
Dependent Claim
18 words
A method according to claim 1, wherein the selected conversion table is stored in advance in a ROM.
Claim 5
Dependent Claim
23 words
A method according to claim 1, wherein the selected conversion table stores data on a relationship between multi-level data and a dot pattern.
Claim 6
Dependent Claim
17 words
A method according to claim 1, wherein one of the output devices is a laser beam printer.
Claim 7
Dependent Claim
15 words
A method according to claim 1, wherein one of the output devices is a display.
Claim 8
Dependent Claim
19 words
A method according to claim 1, wherein said reproduction characteristic depends on a resolution of the selected output device.
Claim 9
Dependent Claim
175 words
An image processing apparatus connected to a plurality of different types of output devices, at two of the types of output devices having respectively different tonality characteristics on multi-level data, wherein each of the multi-level data is represented by a plurality of bits, said apparatus comprising: first means for selecting one of the output devices from the plurality of different types of output devices; second means for selecting, from a plurality of conversion tables stored in advance, a conversion table which is used for converting multi-level data and that corresponds to the type of the selected output device; means for converting values of input multi-level data represented by a plurality of bits into corresponding values of output multi-level data represented by a plurality of bits using the selected conversion table, the selected conversion table causing the output multi-level data to be reproducible by the selected output device as an image of high tonality; and means for outputting the output multi-level data to the selected output device to be reproduced as the image of high tonality.
Claim 10
Dependent Claim
175 words
An image processing apparatus connected to a plurality of different types of output devices, at two of the types of output devices having respectively different tonality characteristics on multi-level data, wherein each of the multi-level data is represented by a plurality of bits, said apparatus comprising: first means for selecting one of the output devices from the plurality of different types of output devices; second means for selecting, from a plurality of conversion tables stored in advance, a conversion table which is used for converting multi-level data and that corresponds to the type of the selected output device; means for converting values of input multi-level data represented by a plurality of bits into corresponding values of output multi-level data represented by a plurality of bits using the selected conversion table, the selected conversion table causing the output multi-level data to be reproducible by the selected output device as an image of high tonality; and means for outputting the output multi-level data to the selected output device to be reproduced as the image of high tonality.
References Cited (Backward Citations)
US4441208A
Cited
US4496989A
Cited
US4566127A
Cited
US4628366A
Cited
US4727589A
Cited
US4672679A
Cited
US4665555A
Cited
US5038389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-06-06 | 2003-12-06 | 2004-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-06-06 | 2007-12-06 | 2008-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-06-06 | 2011-12-06 | 2012-06-06 | $7700.00 | Window Closed / Lapsed |