Digital watermarking apparatus and computer-readable medium
AssigneeFUJIFILM Corporation
InventorTakashi Miyamoto
Life of this patent
Estimating the term…
Abstract
A digital watermarking apparatus for embedding a data in an index color image data, wherein the data is configured by an arrangement of a first data and a second data, and the apparatus has: an allocating unit for allocating the data to values of positions of a color lookup table included in the index color image data; and an adjusting unit for adjusting a value of the color lookup table to which the first data is allocated, to an odd number, and adjusting a value of the color lookup table to which the second data is allocated, to an even number.
Claims16
A digital watermarking apparatus for embedding a data in an index color image data, wherein
- the data is configured by an arrangement of a first data and a second data, and
- the apparatus comprises:
- an allocating unit for allocating the data to values of positions of a color lookup table included in the index color image data;
- and
- an adjusting unit for adjusting a value of the color lookup table to which the first data is allocated, to an odd number, and adjusting a value of the color lookup table to which the second data is allocated, to an even number;
- wherein the allocating unit allocates the data after arranging the first data and the second data in accordance with a rule.
A digital watermarking apparatus for restoring a data embedded in an index color image data, comprising:
- a reading unit for reading out values of positions of a color lookup table included in the index color image data;
- a determining unit for determining whether the readout values are odd or even;
- a first restoring unit for restoring a first data from a value which is determined to be odd, and restoring a second data from a value which is determined to be even;
- and
- a second restoring unit for restoring the data with arranging the restored first and second data;
- wherein the second restoring unit rearranges an arrangement of the first data and the second data in accordance with a rule to restore the data.
A tangible computer-readable medium storing a set of instructions for embedding a data in an index color image data, wherein
- the data is configured by an arrangement of a first data and a second data, and
- the set of instructions comprises:
- allocating the data to values of positions of a color lookup table included in the index color image data;
- adjusting a value of the color lookup table to which the first data is allocated, to an odd number;
- and
- adjusting a value of the color lookup table to which the second data is allocated, to an even number;
- wherein said allocating the data is conducted after arranging the first data and the second data in accordance with a rule.
A tangible computer-readable medium storing a set of instructions for restoring a data embedded in an index color image data, the set of instructions comprising:
- reading out values of positions of a color lookup table included in the index color image data;
- determining whether the readout values are odd or even;
- restoring a first data from a value which is determined to be odd;
- restoring a second data from a value which is determined to be even;
- and
- restoring the data with arranging the restored first and second data;
- wherein the rearranging the restored first and second data is carried out by means of rearranging an arrangement of the first data and the second data in accordance with a rule to restore the data.
Dependencies are inferred from the claim text.