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US5581377A
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Image processing method and apparatus for synthesizing a plurality of images based on density values
Assignee: Canon Inc
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Filing: 1995-01-31
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Granted: 1996-12-03
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Expires: 2015-01-31
Abstract
Abstract High density portions of images are preferentially expressed when a plurality of images constructed by multivalue image data are synthesized. A plurality of different images are synthesized, wherein overlapped multivalue image data of pixels among multivalue image data constructing the images are compared and the multivalue image data of which one of the images should be preferentially used is determined in accordance with the comparison result.
Inventors
- 👤 Hideaki Shimizu
- 👤 Hiroyuki Yaguchi
- 👤 Yasuhiro Takiyama
- 👤 Tadashi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:35
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/387; H04N1/3871
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
126 words
An image processing method comprising: a step of generating first multivalue image data representing a first image; a step of generating second multivalue image data representing a second image; and a synthesizing step of synthesizing the first multivalue image data and the second multivalue image data so that the first image and the second image overlap each other, wherein said synthesizing step includes, a comparing step of comparing a value corresponding to the first multivalue image data and a value corresponding to the second multivalue image data at a same pixel position, and a selecting step of selecting one of the first multivalue image data and the second multivalue image data, on a pixel unit basis, in accordance with a comparison result of said comparing step.
Claim 2
Dependent Claim
126 words
An image processing method comprising: a step of generating first multivalue image data representing a first image; a step of generating second multivalue image data representing a second image; and a synthesizing step of synthesizing the first multivalue image data and the second multivalue image data so that the first image and the second image overlap each other, wherein said synthesizing step includes, a comparing step of comparing a value corresponding to the first multivalue image data and a value corresponding to the second multivalue image data at a same pixel position, and a selecting step of selecting one of the first multivalue image data and the second multivalue image data, on a pixel unit basis, in accordance with a comparison result of said comparing step.
Claim 3
Dependent Claim
46 words
A method according to claim 1, wherein the first and second multivalue image data consists of a plurality of color components for each pixel and a maximum color component of each of the fist and second multivalue image data are preferentially used in said comparing step.
Claim 4
Dependent Claim
46 words
A method according to claim 1, wherein the first and second multivalue image data consisting of a plurality of color components for each pixel and a minimum color component of each of the first and second multivalue image data are preferentially used in said comparing step.
Claim 5
Dependent Claim
124 words
An image processing apparatus comprising: first generating means for generating first multivalue image data representing a first image; second generating means for generating second multivalue image data representing a second image; and synthesizing means for synthesizing the first multivalue image data and the second multivalue image data so that the first image and the second image overlap each other, wherein said synthesizing means includes, comparing means for comparing value corresponding to the first multivalue image data and a value corresponding to the second multivalue image data at a same pixel position, and selecting means for selecting one of the first multivalue image data and the second multivalue image data, on a pixel unit basis, in accordance with a comparison result of said comparing means.
Claim 6
Dependent Claim
124 words
An image processing apparatus comprising: first generating means for generating first multivalue image data representing a first image; second generating means for generating second multivalue image data representing a second image; and synthesizing means for synthesizing the first multivalue image data and the second multivalue image data so that the first image and the second image overlap each other, wherein said synthesizing means includes, comparing means for comparing value corresponding to the first multivalue image data and a value corresponding to the second multivalue image data at a same pixel position, and selecting means for selecting one of the first multivalue image data and the second multivalue image data, on a pixel unit basis, in accordance with a comparison result of said comparing means.
Claim 7
Dependent Claim
46 words
An apparatus according to claim 4, wherein the first and second multivalue image data consisting of a plurality of color components for each pixel and a maximum color component of each of the first and second multivalue image data are preferentially used in said comparing means.
Claim 8
Dependent Claim
46 words
A method according to claim 4, wherein the first and second multivalue image data consisting of a plurality of color components for each pixel and a minimum color component of each of the first and second multivalue image data are preferentially used in said comparing means.
Claim 9
Dependent Claim
123 words
An image processing apparatus comprising: inputting means for inputting first color image data representing a first color image and second color image data representing a second color image; and synthesizing means for synthesizing the first color image data and the second color image data so that the first color image and the second color image overlap each other, wherein said synthesizing means includes, comparing means for comparing a value corresponding to the first color image data and a value corresponding to the second color image data at a same position, and selecting means for selecting one of the first color image data and the second color image data, on a pixel unit basis, in accordance with a comparison result of said comparing means.
Claim 10
Dependent Claim
123 words
An image processing apparatus comprising: inputting means for inputting first color image data representing a first color image and second color image data representing a second color image; and synthesizing means for synthesizing the first color image data and the second color image data so that the first color image and the second color image overlap each other, wherein said synthesizing means includes, comparing means for comparing a value corresponding to the first color image data and a value corresponding to the second color image data at a same position, and selecting means for selecting one of the first color image data and the second color image data, on a pixel unit basis, in accordance with a comparison result of said comparing means.
Claim 11
Dependent Claim
28 words
An apparatus according to claim 7, wherein said inputting means is an image reading apparatus constructed by photoelectric converting means for generating a plurality of color component data.
Claim 12
Dependent Claim
20 words
An apparatus according to claim 7, further comprising extracting means for extracting twin color data from the color component data.
Claim 13
Dependent Claim
28 words
An apparatus according to claim 7, further comprising image forming means for forming a color image in accordance with the color image data synthesized by said synthesizing means.
Claim 14
Dependent Claim
22 words
An apparatus according to claim 10, wherein said image forming means forms an image of a plurality of color components in parallel.
Claim 15
Dependent Claim
127 words
An image processing method comprising: an inputting step of inputting first color image data representing a first color image and second color image data representing a second color image; and a synthesizing step of synthesizing the first color image data and the second color image data so that the first color image and the second color image overlap each other, wherein said synthesizing step includes, a comparing step of comparing a value corresponding to the first color image data and a value corresponding to the second color image data at a same position, and a selecting step of selecting one of the first color image data and the second color image data, on a pixel unit basis, in accordance with a comparison result of said comparing step.
Claim 16
Dependent Claim
127 words
An image processing method comprising: an inputting step of inputting first color image data representing a first color image and second color image data representing a second color image; and a synthesizing step of synthesizing the first color image data and the second color image data so that the first color image and the second color image overlap each other, wherein said synthesizing step includes, a comparing step of comparing a value corresponding to the first color image data and a value corresponding to the second color image data at a same position, and a selecting step of selecting one of the first color image data and the second color image data, on a pixel unit basis, in accordance with a comparison result of said comparing step.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-03 | 2000-06-03 | 2000-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-03 | 2004-06-03 | 2004-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-03 | 2008-06-03 | 2008-12-03 | $7700.00 | Window Closed / Lapsed |