US5699489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color processing arrangements with device independent color space conversion
Assignee: Canon Inc
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Filing: 1993-07-27
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Granted: 1997-12-16
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Expires: 2013-07-27
Abstract
Abstract A color processing method utilizing a plurality of devices having different color spaces as one virtual device. A scanner inquires a computer of color space and presence/absence of a color conversion function. If the computer has the color space conversion function, the scanner transmits color image data with parameters for converting the data into data of the color space of the computer. Inversely, the computer inquires the printer of color space and presence/absence of a color space conversion function. If the printer has the color space conversion function, the computer transmits color image data with parameters obtained from operation of parameters for converting the color space of the image data into the color space of the printer and the parameters received from the scanner.
Inventors
- 👤 Yoshikazu Yokomizo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:45
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/333; H04N1/33307; G; G06; G06F; G06F3/00; G06F3/01; G06F3/048; G06F3/0484; G06F3/04845; H04N1/46
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
127 words
A color processing method for converting input color image data of a first color space depending on a first device into output color image data of a second color space depending on a second device, comprising the steps of: receiving, through a communication line from an external device, first color processing data for converting the first color space into a device independent color space; generating a third parameter by combining said first color processing data and second color processing data for converting the color image data in said device independent color space into color image data in the second color space; and performing color space conversion on the input color image data by using the third parameter to output color image data in the second color space.
Claim 2
Dependent Claim
127 words
A color processing method for converting input color image data of a first color space depending on a first device into output color image data of a second color space depending on a second device, comprising the steps of: receiving, through a communication line from an external device, first color processing data for converting the first color space into a device independent color space; generating a third parameter by combining said first color processing data and second color processing data for converting the color image data in said device independent color space into color image data in the second color space; and performing color space conversion on the input color image data by using the third parameter to output color image data in the second color space.
Claim 3
Dependent Claim
27 words
The method according to claim 1, wherein the color space is three primary color representation as a color mixing system such as RGB, XYZ, CMY and YIQ.
Claim 4
Dependent Claim
19 words
The method according to claim 1, wherein the device independent color space is National Television System Committee (NTSC) RGB.
Claim 5
Dependent Claim
43 words
The method according to claim 1, wherein, in said generating step, forth color processing data relating to a color correction according to tone characteristics of said second device is also combined with said first color processing data and said second color processing data.
Claim 6
Dependent Claim
28 words
The method according to claim 1, wherein, in said receiving step, first color processing data stored in a packet is received based on a protocol between transmitting devices.
Claim 7
Dependent Claim
16 words
The method according to claim 1, wherein said performing step is applied to said second device.
Claim 8
Dependent Claim
16 words
The method according to claim 1, wherein said generating step is applied to said second device.
Claim 9
Dependent Claim
36 words
The method according to claim 1, wherein said input color image data is received independent of said first color processing data, based on a protocol between transmitting sides, through a communication line from said external device.
Claim 10
Dependent Claim
124 words
A color image processing system which has a transmission unit belonging to a first device and a receiving unit belonging to a second device, said transmission unit comprising: transmitting means for transmitting a first parameter for converting a first color space depending on the first device into a standard color space and color image data to said receiving unit through a communication line; and said receiving unit comprising: combining means for generating a third parameter by combining the first parameter and a second parameter for converting the standard color space of said receiving unit into a second color space depending on the second device; and color space conversion means for performing color space conversion for the color image data by using the third parameter.
Claim 11
Dependent Claim
124 words
A color image processing system which has a transmission unit belonging to a first device and a receiving unit belonging to a second device, said transmission unit comprising: transmitting means for transmitting a first parameter for converting a first color space depending on the first device into a standard color space and color image data to said receiving unit through a communication line; and said receiving unit comprising: combining means for generating a third parameter by combining the first parameter and a second parameter for converting the standard color space of said receiving unit into a second color space depending on the second device; and color space conversion means for performing color space conversion for the color image data by using the third parameter.
Claim 12
Dependent Claim
13 words
The system according to claim 9, wherein said first device is a scanner.
Claim 13
Dependent Claim
13 words
The system according to claim 9, wherein said second device is a printer.
Claim 14
Dependent Claim
22 words
The system according to claim 9, wherein said receiving unit is connected with the image processing apparatus via a connection point physically.
Claim 15
Dependent Claim
135 words
A color processing apparatus for converting input color image data for a first color space depending on a first device into output color image data of a second color space depending on a second device, comprising: reception means for receiving, through a communication line form an external device, first color processing data for converting the first color space into a device independent color space; generating means for generating a third parameter by combining said first color processing data and second color processing data for converting the color image data in said device independent color space into color image data in the second color space; and color space conversion means for performing color space conversion on the input color image data by using the third parameter to output color image data in the second color space.
Claim 16
Dependent Claim
135 words
A color processing apparatus for converting input color image data for a first color space depending on a first device into output color image data of a second color space depending on a second device, comprising: reception means for receiving, through a communication line form an external device, first color processing data for converting the first color space into a device independent color space; generating means for generating a third parameter by combining said first color processing data and second color processing data for converting the color image data in said device independent color space into color image data in the second color space; and color space conversion means for performing color space conversion on the input color image data by using the third parameter to output color image data in the second color space.
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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) | 2000-12-15 | 2001-06-16 | 2001-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-15 | 2005-06-16 | 2005-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-15 | 2009-06-16 | 2009-12-16 | $7700.00 | Window Closed / Lapsed |