Estimation of motion at the level of the decoder by matching of models

A method for coding at least one image split up into partitions, implementing, for a current partition to be coded, steps of:

• prediction said current partition from at least one already coded then decoded causal partition,
• reconstruction of said current partition from said predicted current partition, delivering a reconstructed current partition, and
• following said reconstruction step, implementing steps of:
• determination of at least one already coded then decoded causal partition using a motion estimation applied to said reconstructed current partition, and
• modification of said reconstructed current partition by calculation of a function applied both to said determined causal partition and to said reconstructed current partition, delivering a modified reconstructed current partition.

A device for decoding a data signal representing at least one image split up into partitions, comprising, for at least one current partition to be reconstructed in said image:

• means for predicting said current partition from at least one already coded then decoded causal partition,
• means for reconstructing said current partition from said predicted current partition, delivering a reconstructed current partition,
• means for determining at least one already decoded causal partition using a motion estimation applied to said reconstructed current partition,
• means for modifying said reconstructed current partition by calculation of a function applied both to said determined causal partition and to said reconstructed current partition, delivering a modified reconstructed current partition.

A device for coding at least one image split up into partitions, comprising, for a current partition to be coded:

• means for predicting said current partition from at least one already coded then decoded causal partition,
• means for reconstructing said current partition from said predicted current partition, delivering a reconstructed current partition,
• means for determining at least one already coded then decoded causal partition using a motion estimation applied to said reconstructed current partition,
• means for modifying said reconstructed current partition by calculation of a function applied both to said determined causal partition and to said reconstructed current partition, delivering a modified reconstructed current partition.

A non-transitory computer-readable recording medium on which is recorded a computer program comprising instructions for execution of steps of a decoding method, when said program is executed by a computer, said decoding method comprising decoding a data signal representing at least one current image split up into partitions, wherein decoding comprises, for at least one current partition to be reconstructed in said image, steps of:

• prediction of said current partition from at least one already decoded causal partition,
• reconstruction of said current partition, from said predicted current partition, delivering a reconstructed current partition, and
• following said reconstruction step, implementing steps of:
• determination of at least one already decoded causal partition using a motion estimation applied to said reconstructed current partition, and
• modification of said reconstructed current partition by calculation of a function applied both to said determined causal partition and to said reconstructed current partition, delivering a modified reconstructed current partition.

A non-transitory computer-readable recording medium on which is recorded a computer program comprising instructions for execution of steps of a coding method, when said program is executed by a computer, wherein the coding method comprises coding at least one image split UP into partitions, implementing, for a current partition to be coded, steps of:

• prediction of said current partition from at least one already coded then decoded causal partition,
• reconstruction of said current partition from said predicted current partition, delivering a reconstructed current partition, and
• following said reconstruction step, implementing steps of:
• determination of at least one already coded then decoded causal partition using a motion estimation applied to said reconstructed current partition, and
• modification of said reconstructed current partition by calculation of a function applied both to said determined causal partition and to said reconstructed current partition, delivering a modified reconstructed current partition.