US6166750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image processing apparatus and method for adding predetermined additional information to an image by adding a predetermined number of unit dots to partial color component data of the image
Assignee: Canon Inc
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Filing: 1993-01-27
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Granted: 2000-12-26
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Expires: 2013-01-27
Abstract
Abstract Provided are an image processing method and apparatus in which there is little deterioration in picture quality when specific information specifying a copying machine or the user thereof is added to image data. Pixel data in an 8×4 array at a predetermined position of the image data is modulated by subtracting a predetermined value α from 2×4 pixel data 2302 and 2×4 pixel data 2303 and adding the predetermined value a to 4×4 pixel data 2301 in such a manner that the number of pixels from which the predetermined value is subtracted and the number of pixels to which the predetermined value is added will become equal. The modulated data serves as a unit of added information. A plurality of units of the added information are arranged on the image data and the added information is represented by the mutual positional relationship of the plurality of information units.
Inventors
- 👤 Akira Negishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:44
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00838; H04N1/00856; H04N1/00864; H04N1/00867; H04N1/0087; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3204; H04N2201/3205; H04N2201/3269; H04N2201/327; H04N2201/3271
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
179 words
An image processing apparatus comprising: input means for inputting a plurality of color component data; adding means for adding a predetermined number of unit dots to partial color component data of said plurality of color component data inputted by said input means so that the predetermined number of unit dots are not recognizable to human eyes, the partial color component data representing predetermined additional information and including less than all of the plurality of color component data; and output means for outputting all the plurality of color component data including the partial color component data to which the predetermined number of unit dots have been added, wherein the predetermined number of unit dots have a same shape, the predetermined additional information is represented by a dot arrangement of the predetermined number of unit dots, and each unit dot includes first and second areas, and wherein said adding means increases a density of a first area of each unit dot and decreases a density of a second area of each unit dot, thereby preserving a density in each unit dot.
Claim 2
Dependent Claim
179 words
An image processing apparatus comprising: input means for inputting a plurality of color component data; adding means for adding a predetermined number of unit dots to partial color component data of said plurality of color component data inputted by said input means so that the predetermined number of unit dots are not recognizable to human eyes, the partial color component data representing predetermined additional information and including less than all of the plurality of color component data; and output means for outputting all the plurality of color component data including the partial color component data to which the predetermined number of unit dots have been added, wherein the predetermined number of unit dots have a same shape, the predetermined additional information is represented by a dot arrangement of the predetermined number of unit dots, and each unit dot includes first and second areas, and wherein said adding means increases a density of a first area of each unit dot and decreases a density of a second area of each unit dot, thereby preserving a density in each unit dot.
Claim 3
Dependent Claim
28 words
The image processing apparatus according to claim 1, wherein said plurality of color components data include yellow, magenta and cyan, and the partial color component data comprises yellow.
Claim 4
Dependent Claim
19 words
The apparatus according to claim 1, wherein the predetermined additional information comprises information for identifying the image processing apparatus.
Claim 5
Dependent Claim
23 words
The apparatus according to claim 1, wherein the predetermined additional information comprises information for identifying a person who used the image processing apparatus.
Claim 6
Dependent Claim
23 words
The apparatus according to claim 1, wherein said adding means adds same additional information at repeated positions of the partial color component data.
Claim 7
Dependent Claim
27 words
The apparatus according to claim 1, wherein the additional information is represented by a distance between two unit dots included in the predetermined number of unit dots.
Claim 8
Dependent Claim
19 words
The apparatus according to claim 1, wherein the predetermined number of unit dots are not adjacent to each other.
Claim 9
Dependent Claim
32 words
The apparatus according to claim 1, wherein each unit dot further comprises a third area, and said adding means does not change a density of the third area of each unit dot.
Claim 10
Dependent Claim
20 words
The apparatus according to claim 1, wherein said output means comprises image forming means in accordance with an electrophotographic process.
Claim 11
Dependent Claim
183 words
An image processing method comprising: the input step of inputting a plurality of color component data; the adding step of adding a predetermined number of unit dots to partial color component data of the plurality of color component data inputted in said input step so that the predetermined number of unit dots are not recognizable to human eyes, the partial color component data representing predetermined additional information and including less than all of the plurality of color component data; and the output step of outputting all of the plurality of color component data including the partial color component data to which the predetermined number of unit dots have been added, wherein the predetermined number of unit dots have a same shape, the predetermined additional information is represented by a dot arrangement of the predetermined number of unit dots, and each unit dot includes first and second areas, and wherein said adding step increases a density of a first area of each unit dot and decreases a density of a second area of each unit dot, thereby preserving a density in each unit dot.
Claim 12
Dependent Claim
183 words
An image processing method comprising: the input step of inputting a plurality of color component data; the adding step of adding a predetermined number of unit dots to partial color component data of the plurality of color component data inputted in said input step so that the predetermined number of unit dots are not recognizable to human eyes, the partial color component data representing predetermined additional information and including less than all of the plurality of color component data; and the output step of outputting all of the plurality of color component data including the partial color component data to which the predetermined number of unit dots have been added, wherein the predetermined number of unit dots have a same shape, the predetermined additional information is represented by a dot arrangement of the predetermined number of unit dots, and each unit dot includes first and second areas, and wherein said adding step increases a density of a first area of each unit dot and decreases a density of a second area of each unit dot, thereby preserving a density in each unit dot.
References Cited (Backward Citations)
US3997873A
Cited
GB2101376A
Cited
EP0079153A1
Cited
DE3229616A1
Cited
US4908873A
Cited
US4709274A
Cited
JPS60229572A
Cited
US4780806A
Cited
US4723149A
Cited
US4870503A
Cited
US4788575A
Cited
US4739377A
Cited
JPS6461777A
Cited
US5126838A
Cited
US5097348A
Cited
EP0342060A2
Cited
US5047864A
Cited
US4891666A
Cited
US5216724A
Cited
US5327258A
Cited
US5149140A
Cited
US5457540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-12-26 | 2004-06-26 | 2004-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-26 | 2008-06-26 | 2008-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-26 | 2012-06-26 | 2012-12-26 | $7700.00 | Window Closed / Lapsed |