Insertion of messages in digital data
AssigneeCanon Kabushiki Kaisha
InventorsIsabelle Amonou, Ioana Donescu
Life of this patent
Estimating the term…
Abstract
The invention proposes a method of inserting a message in a subset (VO) of digital data representing physical quantities, characterized in that it includes the steps of: estimating (E4) a capacity to receive a message for said subset, selecting (E5) a message with a size less than or equal to the estimated capacity, in a set of a messages, inserting (E6) the selected message in the said subset of digital data. The invention applies particularly to an object in a digital image.
Claims33
A method of inserting a message in a subset of digital data representing physical quantities, characterised in that the method includes the steps of:
- a) estimating a capacity to receive a message for said subset,
- b) comparing to the estimated capacity a size of a message among a set of messages representing a same message with each having a different number of bits,
- c) selecting, from said set of messages, the compared message if said compared message has a size less than or equal to the estimated capacity, and
- d) inserting the selected message in the said subset of digital data.
The storage medium according to claim 14, characterised in that said storage medium is detachably mountable on an insertion device according to claim 21.
A method of extracting a message from a subset of digital data representing physical quantities, characterised in that it includes steps of:
- extracting the message,
- comparing the extracted message with messages stored in memory, and
- identifying the fact that the extracted message belongs to a set of stored messages representing a same message with each having a different number of bits.
A device for extracting a message from a subset of digital data representing physical quantities, characterised in that the device for extracting comprises:
- means for extracting the message,
- means for comparing the extracted message with messages stored in memory and
- means for identifying the fact that the extracted message belongs to a set of stored messages representing a same message with each having different number of bits.
A device for inserting a message in a subset of digital data representing physical quantities, characterised in that it comprises:
- means for estimating a capacity to receive a message for said subset,
- means for comparing to the estimated capacity a size of a message among a set of messages representing a same message with each having a different number of bits,
- means for selecting, from said set of messages, the compared message if said compared message has a size less than or equal to the estimated capacity, in a set of messages, and
- means for inserting the selected message in the said subset of digital data.
Dependencies are inferred from the claim text.