Method and device for compressing and/or indexing digital images
AssigneeCanon Kabushiki Kaisha
InventorLilian Labelle
Life of this patent
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Abstract
The invention concerns a method of indexing on a digital image which has been compressed or is to be compressed according to a compression method using compression parameters which influence the resulting quantity of information contained in at least part of the compressed image, the indexing requiring a predetermined quantity of information, characterised in that the method includes, prior to a step of indexing the digital image, the steps of: determining from at least one of the compression parameters for at least part of the compressed image, checking whether the resulting quantity of information corresponding to the compression parameters is adapted to the predetermined quantity of information required for the indexing of the image.
Claims36
A method of indexing on a digital image which has been compressed or is to be compressed according to a compression method using compression parameters which influence the resulting quantity of information contained in at least part of the compressed image, the indexing requiring a predetermined quantity of information, characterised in that the method comprises, prior to a step of indexing the digital image, the steps of:
- determining at least one of the compression parameters for at least part of the compressed image,
- checking whether the resulting quantity of information corresponding to the compression parameters is adapted to the predetermined quantity of information required for the indexing of the image.
A device for indexing on a digital image which has been compressed or is to be compressed according to a compression method using compression parameters which influence the resulting quantity of information contained in at least part of the compressed image, the indexing requiring a quantity of information, characterised in that the device comprises:
- determination means for determining at least one compression parameter for at least part of the compressed image,
- checking means for checking whether the resulting quantity corresponding to the compression parameters is adapted to the predetermined quantity necessary for the indexing of the image and indexing means operating according to the result of the checking means.
A method of compressing a digital image, the compression being effected according to compression parameters influencing the resulting quantity of information contained in at least part of the compressed image, characterised in that the method comprises the steps of:
- checking whether the quantity of information contained in at least part of the image corresponding to the compression parameters is adapted to an indexing of the compressed image,
- modifying at least one of the compression parameters if the resulting quantity is not adapted to the indexing of the compressed image,
- compressing the digital image according to at least one of the modified compression parameters.
A device for compressing a digital image, the compression being effected according to compression parameters influencing the resulting quantity of information contained in at least part of the compressed image, characterised in that the device comprises:
- means for checking whether the quantity of information contained in at least part of the image corresponding to the compression parameters is adapted to an indexing of the compressed image,
- means of modifying at least one of the compression parameters if the resulting quantity is not adapted to the indexing of the compressed image,
- means of compressing the digital image according to at least one of the modified compression parameters.
Dependencies are inferred from the claim text.