Patent EP0642060A2 successfully refreshed from Google Patents.
EP0642060A2
Expired / Lapsed
EP
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Image processing apparatus
Assignee: Toshiba Corp
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Filing: 1994-09-02
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Granted: —
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Expires: 2014-09-02
Abstract
Abstract In the apparatus for processing a color image, a data signal representing another information differs from the color image is generated by a generating means (103). The another information is embedded into the color image by varying one of a color difference and a chroma of the color image in accordance with the data signal by an image processing means (104, 105). <IMAGE>
Inventors
- 👤 Haruko C/O Int. Prop. Division Kawakami
- 👤 Hidekazu C/O Int. Prop. Division Sekizawa
- 👤 Naofumi C/O Int. Prop. Division Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 23:14
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; H; H04; H04N; H04N1/00; H04N1/46; G06; G06T; G06T1/00; G06T1/0021; G06T1/0028; H04N1/32; H04N1/32101; H04N1/32144; H04N1/32149; H04N1/32203; H04N1/32208; H04N1/32309; G06T2201/00; G06T2201/005; G06T2201/0051; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3269; H04N2201/327; H04N2201/3271; H04N2201/3278
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
65 words
An apparatus for processing a color image, characterized by comprising: means (103; 2202) for generating a data signal representing another information which differs from the color image; and image processing means (104, 105; 2203, 2204, 2205) for embedding the another information into the color image by varying one of a color difference and a chroma of the color image in accordance with the data signal.
Claim 2
Independent Claim
79 words
An apparatus for processing a color image, characterized by comprising: means (103; 2202) for generating a data signal representing another information which differs from the color image; and image processing means (104, 105; 2203, 2204, 2205) for embedding the another information into the color image by varying one of a color difference and a chroma of the color image in accordance with the data signal while keeping a sum of three color component signals of the color image constant.
Claim 3
Dependent Claim
19 words
The apparatus according to claim 2, characterized in that said three color component signals are primaries of substructive mixture.
Claim 4
Dependent Claim
19 words
The apparatus according to claim 2, characterized in that said three color component signals are primaries of additive mixture.
Claim 5
Dependent Claim
47 words
The apparatus according to claim 1, characterized in that said image processing means includes: means (102) for converting three color component signals into a luminance signal, a first and second color difference signals, and means (105) for embedding the another information into the second color difference signal.
Claim 6
Dependent Claim
32 words
The apparatus according to claim 5, characterized in that said first color difference signal is a red-green color difference signal and said second color difference signal is a yellow-blue color difference signal.
Claim 7
Dependent Claim
50 words
The apparatus according to claim 1, characterized in that said image processing means includes: means (602) for converting tree color component signals into a luminance signal, a first and second color difference signals, and means (603, 604) for embedding the another information into the first and second color difference signals.
Claim 8
Dependent Claim
32 words
The apparatus according to claim 7, characterized in that said first color difference signal is a red-green color difference signal and said second color difference signal is a yellow-blue color difference signal.
Claim 9
Dependent Claim
37 words
The apparatus according to claim 1, characterized in that said image processing means includes: means (2203, 2204, 2205) for embedding the another information into the color image by varying three color component signals of the color image.
Claim 10
Dependent Claim
49 words
The apparatus according to claim 1, characterized in that said image processing means includes: means (2203, 2204) for converting the data signal into a variation of one of the color difference and the chroma of the color image; and means (2205) for giving the variation to the color image.
Claim 11
Dependent Claim
48 words
The apparatus according to claim 1, characterized by further comprising: means (108; 2206) for recording the color image into which the another information is repeatedly embedded by said image processing means, on a recording medium, said another information being repeatedly recorded on each area of the recording medium.
Claim 12
Dependent Claim
31 words
The apparatus according to claim 11, characterized by further comprising: means for extracting the another information from the color image which is recorded on the recording medium by said recording means.
Claim 13
Dependent Claim
45 words
The apparatus according to claim 12, characterized in that said extracting means includes: means for detecting the color image in which the another information is repeatedly recorded on the recording medium, and means for averaging the color image which is detected by said detecting means.
Claim 14
Dependent Claim
34 words
The apparatus according to claim 1, characterized by further comprising: means (108; 2206) for recording the color image into which the another information is embedded by said image processing means, on a recording medium.
Claim 15
Dependent Claim
31 words
The apparatus according to claim 14, characterized by further comprising: means for extracting the another information from the color image which is recorded on the recording medium by said recording means.
Claim 16
Dependent Claim
116 words
The apparatus according to claim 5, characterized by further comprising: means (106) for converting the color image into which the another information is embedded by said image processing means, into three color component signals; means (108) for recording the color image on a recording medium in accordance with the three color component signals; means for reading out the color image which is recorded on the recording medium by said recording means; means for converting the color image which is read out by said recording means into the luminance signal, the first and second color difference signals; and means for extracting the another information from the first color difference signal which is obtained by said converting means.
Claim 17
Dependent Claim
118 words
The apparatus according to claim 7, characterized by further comprising: means (607) for converting the color image into which the another information is embedded by said image processing means, into three color component signals; means (609) for recording the color image on a recording medium in accordance with the three color component signals; means for reading out the color image which is recorded on the recording medium by said recording means; means for converting the color image which is read out by said recording means into the luminance signal, the first and second color difference signals; and means for extracting the another information from the first and second color difference signals which are obtained by said converting means.
Claim 18
Dependent Claim
34 words
The apparatus according to claim 15, characterized in that said extracting means includes: means for executing band pass processing of predetermined frequency band for the color image which is recorded on the recording medium.
Claim 19
Dependent Claim
50 words
The apparatus according to claim 1, characterized in that said processing means includes: means (807) for detecting higher level components of luminance of the color image, and means (803, 804, 808a, 808b) for varying an amount of another information to be embedded in accordance with the detected higher level components.
Claim 20
Independent Claim
88 words
An apparatus for processing a color image, characterized by comprising: means (904, 905; 2303) for generating a data signal representing another information differs from the color image; and image processing means (906, 907; 2304, 2305, 2306) for embedding the another information into the color image by superposing a moire pattern on the color image while keeping a sum of three color component signals of the color image constant, the moire pattern including a plurality of frequency components in accordance with the data signal generated by said generating means.
Claim 21
Independent Claim
74 words
An apparatus for processing a color image, characterized by comprising: means (904, 905; 2303) for generating a data signal representing another information differs from the color image; and image processing means (906, 907; 2304, 2305, 2306) for embedding the another information into the color image by superposing a moire pattern on the color image, the moire pattern including a plurality of frequency components in accordance with the data signal generated by said generating means.
Claim 22
Dependent Claim
47 words
The apparatus according to claim 21, characterized in that said image processing means includes: means for setting the plurality of frequency components on a plane, and means for superposing the moire pattern on the color image, in accordance with an arrangement of the plurality of frequency components.
Claim 23
Dependent Claim
41 words
The apparatus according to claim 22, characterized in that said setting means includes: means for increasing a frequency of part of the plurality of frequency components as a set point of thereof on the plane becomes far from a predetermined point.
Claim 24
Dependent Claim
34 words
The apparatus according to claim 23, characterized in that said setting means includes: means for providing a plurality of dummy frequency components to be set with the plurality of frequency components on the plane.
Claim 25
Dependent Claim
37 words
The apparatus according to claim 22, characterized in that said setting means includes: means for arranging part of the plurality of frequency components so that the arrangement will draw a circle or an ellipse on the plane.
Claim 26
Dependent Claim
34 words
The apparatus according to claim 22, characterized in that said setting means includes: means for arranging part of the plurality of frequency components so that the arrangement will draw a lattice on the plane.
Claim 27
Dependent Claim
34 words
The apparatus according to claim 26, characterized in that said setting means includes: means for shifting phase with regard to the part of the plurality of frequency components to be set on the plane.
Claim 28
Dependent Claim
44 words
The apparatus according to claim 22, characterized in that said setting means includes: means for setting a starting bit indicating a starting point of the plurality of frequency components on the plane, and means for irregularly setting part of the plurality of frequency components.
Claim 29
Dependent Claim
42 words
The apparatus according to claim 22, characterized by further comprising: band elimination filter (903; 2302) for eliminating a frequency band, which corresponding to the plurality of frequency components, so as to obtain a color image onto the moire pattern is not superposed.
Claim 30
Dependent Claim
32 words
The apparatus according to claim 22, characterized in that said setting means includes: means for increasing an amplitude of part of the plurality of frequency components as a frequency thereof becomes higher.
Claim 31
Dependent Claim
38 words
The apparatus according to claim 22, characterized by further comprising: means (909; 2307) for recording the color image which is processed by said image processing means and into which the another information is embedded, on a recording medium.
Claim 32
Dependent Claim
31 words
The apparatus according to claim 31, characterized by further comprising: means for extracting the another information from the color image which is recorded on the recording medium by said recording means.
Claim 33
Dependent Claim
24 words
The apparatus according to claim 32, characterized in that said extracting means includes: means for executing Fourier transform with regard to the color image.
Claim 34
Dependent Claim
47 words
The apparatus according to claim 22, characterized in that said image processing means includes: means (902) for converting three color component signals into a luminance signal, a first and second color difference signals, and means (907) for embedding the another information into the first color difference signal.
Claim 35
Dependent Claim
49 words
The apparatus according to claim 22, characterized in that said image processing means includes: means (902) for converting three color component signals into a luminance signal, a first and second color difference signals, and means (907) for embedding the another information into the first and second color difference signals.
Claim 36
Dependent Claim
115 words
The apparatus according to claim 34, characterized by further comprising: means (908) for converting the color image into which the another information is embedded by said image processing means, into three color component signals; means (909) for recording the color image on a recording medium in accordance with the three color component signals; means for reading out the color image which is recorded on the recording medium by said recording means; means for converting the color image which is read out by said reading means into the luminance signal, the first and color difference signal; and means for extracting the another information from the first color difference signal which is obtained by said converting means.
Claim 37
Dependent Claim
118 words
The apparatus according to claim 35, characterized by further comprising: means (908) for converting the color image into which the another information is embedded by said image processing means, into three color component signals; means (909) for recording the color image on a recording medium in accordance with the three color component signals; means for reading out the color image which is recorded on the recording medium by said recording means; means for converting the color image which is read out by said reading means into the luminance signal, the first and second color difference signals; and means for extracting the another information from the first and second color difference signals which is obtained by said converting means.
Claim 38
Dependent Claim
21 words
The apparatus according to claim 36, characterized by further comprising: means for executing Fourier transform with regard to the color image.
Claim 39
Dependent Claim
21 words
The apparatus according to claim 37, characterized by further comprising: means for executing Fourier transform with regard to the color image.
Claim 40
Dependent Claim
20 words
The apparatus according to claim 36, characterized by further comprising: means for detecting predetermined frequency band from the color image.
Claim 41
Dependent Claim
20 words
The apparatus according to claim 37, characterized by further comprising: means for detecting predetermined frequency band from the color image.
Claim 42
Independent Claim
55 words
An apparatus for processing a monochromatic image, characterized by comprising: means (1403, 1404) for generating a data signal representing another information which differs from the monochromatic image; and image processing means (1406, 1407) for embedding the another information into the monochromatic image by varying luminance of the monochromatic image in accordance with the data signal.
Claim 43
Independent Claim
56 words
An apparatus for processing character information, characterized by comprising: means (1403, 1404) for generating a data signal representing another information which differs from the character information; and information processing means (1406, 1407) for embedding the another information into the character information by varying pitches of arrangement of the character information in accordance with the data signal.
Claim 44
Independent Claim
63 words
An apparatus characterized by comprising: means for inputting a second color image formed of a first color image into which another information differing from the first color image has been embedded by varying one of a color difference and a chroma of the first color image; and means for extracting the another information from the second color image input by said inputting means.
Claim 45
Independent Claim
147 words
An apparatus characterized by comprising: means for inputting a second color image formed of a first color image, which includes a luminance signal and a first and second color difference signals, and into which another information differing from the first color image has been embedded by adding a data signal representing the another information to the first color difference signal so as to vary a color difference of the first color image; means for reading the second color image input by said inputting means; means for converting the second color image read by said reading means into the luminance signal and the first color signal to which the data signal has been added and the second color difference signal; and means for taking out the data signal from the first color difference signal which is obtained by said converting means, so as to obtain the another information.
Claim 46
Independent Claim
146 words
An apparatus characterized by comprising: means for inputting a second color image formed of a first color image, which includes a luminance signal and a first and second color difference signals, and into which another information differing from the first color image has been embedded by adding a data signal representing the another information to the first and second color difference signals so as to vary a chroma of the first color image; means for reading the second color image input by said inputting means; means for converting the second color image read by said reading means into the luminance signal and the first and second color signals to which the data signal has been added; and means for taking out the data signal from the first and second color difference signals which are obtained by said converting means, so as to obtain the another information.
Claim 47
Independent Claim
108 words
An apparatus characterized by comprising: means for inputting a second color image formed of a first color image into which another information differing from the first color image has been embedded by varying one of a color difference and a chroma of the first color image, the another information having been repeatedly embedded into each area of the first color image; means for detecting the each area from the second color image input by said inputting means; means for extracting the repeatedly embedded another information from the each area detected by said detecting means; and means for averaging the repeatedly embedded another information extracted by said extracting means.
Claim 48
Dependent Claim
28 words
The apparatus according to claim 44, characterized in that said extracting means includes: means for executing band pass processing of predetermined frequency band for the second color image.
References Cited (Backward Citations)
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