Method for coding and decoding images, encoding device and image decoding and corresponding computer programs

The invention encoding at least one picture (IN) cut into partitions (PA1, PA2, ... PAn), characterized in that it implements, for a current partition to be coded, the steps of: - selection (C2) at least one causal partition already encoded and then decoded, - calculation (C4) of at least one optimal encoding parameter (idx1, idx2, ..., IdxK) associated with said selected causal partition, according to a predetermined encoding performance criterion, on a competitive basis with a plurality of coding parameters applied to said selected causal partition, - coding of the current partition using said optimum encoding parameter calculated.