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EP0859337A2
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Image data encoding system and image inputting apparatus
Assignee: NEC Corp
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Filing: 1998-02-13
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Granted: —
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Expires: 2018-02-13
Abstract
Abstract An image data encoding system is disclosed, that comprises a discrete cosine transforming means (101) for discrete-cosine transforming the original image, an electronic watermark data embedding means (102) for embedding the electronic watermark data (103) in the data that has been transformed by the discrete cosine transforming means (101), and a data selecting means (106; 110) for selecting the output signal (107) of the discrete cosine transforming means (101) or the output signal (108) of the electronic watermark data embedding means (102). Another image data encoding system is also disclosed, that comprises an electronic watermark embedding means (404) for embedding electronic watermark data selected from a plurality of types (408(0),...,408(n)) of electronic watermark data to the digital image data (401), wherein at least one of the plurality of types (408(0),...,408(n)) of electronic watermark data is predetermined electronic watermark data that does not affect the digital image data (401) even if the electronic watermark data is embedded in the digital image data (401).
Inventors
- 👤 Hirotaka Nakano
- 👤 Masahiro Hashimoto
- 👤 Koji Manabe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:38
CPC Classifications
H; H04; H04N; H04N19/00; G; G06; G06T; G06T1/00; G06T1/0021; G06T1/0028; G06T1/0035; G06T1/20; H04N1/00; H04N1/32; H04N1/32101; H04N1/32144; H04N1/32149; H04N1/32154; H04N1/32165; H04N1/32187; H04N1/32192; H04N1/32267; H04N1/32277; H04N19/46; H04N19/467; H04N19/60; H04N21/00; H04N21/20; H04N21/23; H04N21/238; H04N21/2389; H04N21/23892; H04N21/80; H04N21/83; H04N21/835; H04N21/8358; G06T2201/00; G06T2201/005; G06T2201/0052; G06T2201/0053; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3225; H04N2201/3233; H04N2201/324
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
An image data encoding system for embedding electronic
watermark data to an original image, which
comprises: discrete cosine transforming means (101) for discrete-cosine
transforming said original image; electronic watermark data embedding means (102) for
embedding said electronic watermark data (103) in
the data which has been transformed by said discrete
cosine transforming means (101); and data selecting means (106; 110) for selecting the
output signal (107) of said discrete cosine transforming
means (101) or the output signal (108) of
said electronic watermark data embedding means
(102).
Claim 2
Dependent Claim
64 words
The image data encoding system as set forth in claim
1, which further comprises: a flip-flop (111) connected to said data selecting
means (106), wherein said data selecting means (106; 110) selects
the output signal (107) of said discrete cosine
transforming means (101) or the output signal (108)
of said electronic watermark data embedding means
(102) corresponding to information stored in said
flip-flop (111).
Claim 3
Dependent Claim
51 words
The image data encoding system as set forth in claim
1 or 2, wherein said data selecting means (106; 110) selects
the output signal (107) of said discrete cosine
transforming means (101) or the output signal (108)
of said electronic watermark data embedding means
(102) corresponding to an external signal (112).
Claim 4
Dependent Claim
92 words
An image data encoding system for encoding digital
image data (401) in a predetermined encoding manner
and outputting the resultant image data, which comprises: an electronic watermark embedding means (404) for
embedding electronic watermark data selected from a
plurality of types of electronic watermark data
(408(0), 408(1), 408(2),..., 408(n)) to said digital
image data (401), wherein at least one of the plurality of types of
electronic watermark data (408(0),...,408(n)) is
predetermined electronic watermark data which does
not affect said digital image data (401) even if embedded
in said digital image data (401).
Claim 5
Dependent Claim
121 words
An image data encoding system for encoding digital
image data (401) in a predetermined manner and out-putting
the resultant data, comprising: a plurality of electronic watermark data tables
(408(0), 408(1), 408(2),...,408(n)) having a plurality
of types of electronic watermark data for identifying
said digital image data (401); an electronic watermark data selecting means (407)
for selecting one of said electronic watermark data
tables; and an electronic watermark data embedding means (404)
for embedding the selected type of electronic watermark
data in said digital image data (401), wherein at least one of said electronic watermark
data tables (408(0),...408(n)) has a predetermined
electronic watermark data which does not affect said
digital image data (401) even if embedded in the
digital image data (401).
Claim 6
Dependent Claim
84 words
The image data encoding system as set forth in claim
4 or 5, which further comprises: transforming means (402) for transforming said digital
image data (401) into frequency components and
outputting the resultant data to said electronic watermark
data embedding means (404); a quantizing means (405) for quantizing the data in
which electronic watermark data has been embedded by
said electronic watermark data embedding means
(404); and a variable-length encoding means (406) for encoding
output data of said quantizing means (405) into
variable-length code.
Claim 7
Dependent Claim
36 words
The image data encoding system as set forth in anyone
of the foregoing claims, wherein said predetermined electronic watermark data
is composed of other than random numbers generated
by an algorithm corresponding to a normal distribution.
Claim 8
Dependent Claim
138 words
An image inputting apparatus, which comprises: image pickup means (501; 601) for obtaining an analog
image signal; analog-to-digital converting means (502; 602) for
converting said analog image signal obtained by said
image pickup means (501; 601) into image data; transforming means (503; 603) for transforming said
image data into data (701) in first frequency domain; storing means (507; 607) for temporarily storing the
data (704) in said first frequency domain; identification data holding means (510; 610) for
holding identification data (704); means (509; 702) for adding said identification data
(704) to the data (701) in the first frequency domain
and generating data (703) in second frequency
domain; and selecting means (508; 608) for selecting either of
the data (704) in said first frequency domain and
the data (703) in said second frequency domain and
outputting the selected data.
Claim 9
Dependent Claim
21 words
The image inputting apparatus as set forth in claim
8, wherein said transforming means (503; 603) is an
orthogonal transforming means.
Claim 10
Dependent Claim
137 words
An image inputting apparatus, comprising: image pickup means (601) for obtaining an analog image
signal; analog-to-digital converting means (602) for converting
said analog image signal obtained by said
image pickup means (601) into image data; transforming means (603) for transforming said image
data into data (701) in first frequency domain;
storing means (807) for temporarily storing said image
data; identification data holding means (610) for holding
identification data (704); means (702) for adding the identification data (704)
to the data (701) in said first frequency domain and
generating data (703) in second frequency domain; inverse-transforming means (811) for inversely transforming
the data in said second frequency domain into
data in time domain; and selecting means (808) for selecting either of the
output signal of said inverse-transforming means
(811) and the output signal of said storing means
(807).
Claim 11
Dependent Claim
32 words
The image inputting apparatus as set forth in claim
10, wherein said transforming means (503; 603) is an orthogonal
transforming means and said inverse transforming
means (811) is an orthogonal inverse-transforming
means.
Claim 12
Dependent Claim
36 words
The image inputting apparatus as set forth in anyone
of the claims 8 to 11, which further comprises: compressing means (504; 604) for compressing and encoding
the output signal of said selecting means
(508; 608; 808).
References Cited (Backward Citations)
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