US5777750A
Expired / Lapsed
US
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Image processing method and apparatus which includes a color reversing function for a two-color image
Assignee: Canon Inc
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Filing: 1996-06-21
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Granted: 1998-07-07
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Expires: 2016-06-21
Abstract
Abstract Image data is separated into two colors to obtain two-color image data to form a two-color image. The two-color image data is reversed to obtain reversed two-color image data, which is output to an image forming device which forms an image of two colors.
Inventors
- 👤 Yasuhiro Takiyama
- 👤 Ryosuke Miyamoto
- 👤 Hideaki Shimizu
- 👤 Hiroyuki Yaguchi
- 👤 Tadashi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:33
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
64 words
An image processing apparatus which comprises: reverse means for reversing color density of image data; separation means for separating image data into two colors and obtaining image data consisting of two colors; and output means for outputting the image data consisting of two colors to an image forming apparatus which forms a visible image consisting of two colors based on the two-color image data.
Claim 2
Dependent Claim
64 words
An image processing apparatus which comprises: reverse means for reversing color density of image data; separation means for separating image data into two colors and obtaining image data consisting of two colors; and output means for outputting the image data consisting of two colors to an image forming apparatus which forms a visible image consisting of two colors based on the two-color image data.
Claim 3
Dependent Claim
24 words
The image processing apparatus according to claim 1, wherein said separation means separates the image data obtained by said reverse means into two colors.
Claim 4
Dependent Claim
25 words
The image processing apparatus according to claim 1, wherein said reverse means reverses color density of the two-color image data obtained by said separation means.
Claim 5
Dependent Claim
72 words
An image processing apparatus comprising: reverse means for reversing color density of image data to obtain a density-reversed image data; separation means for separating the density-reversed image data obtained by said reverse means into two colors to obtain two-color image data consisting of two colors; and output means for outputting the two-color image data obtained by said separation means to an image forming apparatus which forms an image consisting of two colors.
Claim 6
Dependent Claim
72 words
An image processing apparatus comprising: reverse means for reversing color density of image data to obtain a density-reversed image data; separation means for separating the density-reversed image data obtained by said reverse means into two colors to obtain two-color image data consisting of two colors; and output means for outputting the two-color image data obtained by said separation means to an image forming apparatus which forms an image consisting of two colors.
Claim 7
Dependent Claim
54 words
The image processing apparatus according to claim 4, wherein said reverse means comprises: plural types of image reverse processing techniques for reversing color density of image data; and selecting means for selecting a desired image reverse processing technique from said plural types of image reverse processing techniques to be utilized by said reverse means.
Claim 8
Dependent Claim
32 words
The image processing apparatus according to claim 4, wherein said reverse means obtains density reversed data by reversing C, M and Y density data generated from R, G and B luminance data.
Claim 9
Dependent Claim
33 words
The image processing apparatus according to claim 4, wherein said reverse means obtains density reversed data by reversing C, M, Y and K density data generated from R, G and B luminance data.
Claim 10
Dependent Claim
47 words
The image processing apparatus according to claim 4, wherein said reverse means reverses density at the time of logarithmic transformation in which R, G and B luminance data is transformed to at least either of C, M and Y data or C, M, Y and K data.
Claim 11
Dependent Claim
66 words
An image processing apparatus comprising: separation means for separating image data into two colors to obtain two-color image data; reverse means for reversing the two-color image data obtained by said separation means to obtain reversed two-color image data; and output means for outputting the reversed two-color image data obtained by said reverse means to an image forming apparatus which forms an image consisting of two colors.
Claim 12
Dependent Claim
66 words
An image processing apparatus comprising: separation means for separating image data into two colors to obtain two-color image data; reverse means for reversing the two-color image data obtained by said separation means to obtain reversed two-color image data; and output means for outputting the reversed two-color image data obtained by said reverse means to an image forming apparatus which forms an image consisting of two colors.
Claim 13
Dependent Claim
54 words
The image processing apparatus according to claim 9, wherein said reverse means comprises: plural types of image reverse processing techniques for reversing color density of image data; and selecting means for selecting a desired image reverse processing technique from said plural types of image reverse processing techniques to be utilized by said reverse means.
Claim 14
Dependent Claim
54 words
The image processing apparatus according to claim 9, wherein said reverse means selects a color having a maximum density value from colors utilized in the two-color image data, to form a single-color image data with the selected color, and reverses the single-color image data to obtain reversed image data corresponding to the two-color image.
Claim 15
Dependent Claim
38 words
The image processing apparatus according to claim 9, wherein said reverse means executes reversing process only for the density of the color having a maximum density value in the two-color image data, to obtain reversed two-color image data.
Claim 16
Dependent Claim
16 words
The image processing apparatus according to claim 9, wherein said two colors are red and black.
Claim 17
Dependent Claim
45 words
The image processing apparatus according to claim 9, wherein in the two-color image data consisting of a first and a second colors, if a pixel in the image does not include the second color, said reverse means reverses color density of the first color data.
Claim 18
Dependent Claim
66 words
An image processing method comprising the steps of: reversing color density of image data to obtain a density-reversed image data; separating the density-reversed image data obtained in said reversing step into two colors to obtain two-color image data consisting of two colors; and outputting the two-color image data obtained in said separating step to an image forming apparatus which forms an image consisting of two colors.
Claim 19
Dependent Claim
66 words
An image processing method comprising the steps of: reversing color density of image data to obtain a density-reversed image data; separating the density-reversed image data obtained in said reversing step into two colors to obtain two-color image data consisting of two colors; and outputting the two-color image data obtained in said separating step to an image forming apparatus which forms an image consisting of two colors.
Claim 20
Dependent Claim
56 words
The image processing method according to claim 15, wherein said reversing step includes plural types of image reverse processing techniques for reversing color density of image data; and further comprising the step of selecting a desired image reverse processing technique to be utilized in said reversing step, from said plural types of image reverse processing techniques.
Claim 21
Dependent Claim
34 words
The image processing method according to claim 15, wherein in said reversing step, density reversed data is obtained by reversing C, M and Y density data generated from R, G and B luminance data.
Claim 22
Dependent Claim
35 words
The image processing method according to claim 15, wherein in said reversing step, density reversed data is obtained by reversing C, M, Y and K density data generated from R, G and B luminance data.
Claim 23
Dependent Claim
49 words
The image processing method according to claim 15, wherein in said reversing step, density is reversed at the time of logarithmic transformation in which R, G and B luminance data is transformed to at least either of C, M and Y data or C, M, Y and K data.
Claim 24
Dependent Claim
65 words
An image processing method comprising the steps of: separating image data into two colors to obtain two-color image data which forms a two-color image; reversing the two-color image data obtained in said separating step to obtain reversed two-color image data; and outputting the reversed two-color image data obtained in said reversing step to an image forming apparatus which forms an image consisting of two colors.
Claim 25
Dependent Claim
65 words
An image processing method comprising the steps of: separating image data into two colors to obtain two-color image data which forms a two-color image; reversing the two-color image data obtained in said separating step to obtain reversed two-color image data; and outputting the reversed two-color image data obtained in said reversing step to an image forming apparatus which forms an image consisting of two colors.
Claim 26
Dependent Claim
56 words
The image processing method according to claim 20, wherein said reversing step includes plural types of image reverse processing techniques for reversing color density of image data; and further comprising the step of selecting a desired image reverse processing technique from said plural types of image reverse processing techniques to be utilized in said reversing step.
Claim 27
Dependent Claim
59 words
The image processing method according to claim 20, wherein in said reversing step, a color having a maximum density value is selected from colors utilized in the two-color image data, to form a single-color image data with the selected color, and the single-color image data is reversed to obtain a reversed image data corresponding to the two-color image data.
Claim 28
Dependent Claim
42 words
The image processing method according to claim 20, wherein in said reversing step, an image reversing process is executed only for the density of the color having a maximum density value in the two-color image data, to obtain reversed two-color image data.
Claim 29
Dependent Claim
16 words
The image processing method according to claim 20, wherein said two colors are red and black.
Claim 30
Dependent Claim
46 words
The image processing method according to claim 20, wherein in the two-color image data consisting of a first and a second colors, if a pixel in the image does not include the second color, density of the first color data is reversed in said reversing step.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-07-06 | 2002-01-05 | 2002-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-06 | 2006-01-05 | 2006-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-06 | 2010-01-05 | 2010-07-07 | $7700.00 | Window Closed / Lapsed |