Depth-color alignment with assistance metadata for transcoding of volumetric video

A method comprising:

• decoding from a data stream, a multi-view plus depth image, the multi-view plus depth image comprising color views and depth views, wherein at least one of the color views is unaligned with depth views and decoding metadata representative of subsets of depth views, each subset being associated with an unaligned color view;
• and
• for each unaligned color view, generating a depth view aligned with the unaligned color view by warping the depth views of the subset to the unaligned color view.

A device comprising a memory associated with a processor configured for:

• decoding from a data stream, a multi-view plus depth image, the multi-view plus depth image comprising color views and depth views, wherein at least one of the color views is unaligned with a depth view and decoding metadata representative of subsets of depth views, each subset being associated with an unaligned color view;
• and
• for each unaligned color view, generating a depth view aligned with the unaligned color view by warping the depth views of the subset to the unaligned color view.

A non-transitory processor-readable storage medium carrying data representative of:

• a multi-view plus depth image, the multi-view plus depth image comprising color views and depth views, wherein at least one of the color views is unaligned with a depth view;
• and
• metadata representative of subsets of depth views, each subset being associated with an unaligned color view.