Method and apparatus for signaling and storing grouping types in an image container file

An apparatus comprising

• at least one processor and
• at least one non-transitory memory including computer program code for one or more programs, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:
• receive one or more base image items and one or more pre-derived image items associated with the one or more base image items;
• assign a pre-derivation property identifier data structure identifying one or more pre-derivation properties of the one or more pre-derived image items, wherein the one or more pre-derived image items comprise one or more image items previously generated via application of respective identified ones of the one or more pre-derivation properties to respective ones of the one or more base image items;
• and
• construct an image package comprising the one or more base image items, the one or more pre-derived image items, and the pre-derivation property identifier data structure.

A method comprising:

• receiving an image package comprising one or more base image items and one or more pre-derived image items;
• identifying one or more pre-derivation properties associated with respective ones of the one or more pre-derived image items, wherein the image package comprises a pre-derivation property identifier data structure comprising the one or more pre-derivation properties, wherein the one or more pre-derived image items comprise one or more image items previously generated via application of respective identified ones of the one or more pre-derivation properties to respective ones of the one or more base image items;
• and
• causing the one or more pre-derived image items to be processed based, at least partially, on the one or more pre-derivation properties that has been identified.

An apparatus comprising

• at least one processor and
• at least one non-transitory memory including computer program code for one or more programs, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:
• receive an image package complising one or more base image items and one or more pre-derived image items;
• identify one or more pre-derivation properties associated with respective ones of the one or more pre-derived image items, wherein the image package comprises a pre-derivation property identifier data structure comprising the one or more pre-derivation properties, wherein the one or more pre-derived image items comprise one or more image items previously generated via application of respective identified ones of the one or more pre-derivation properties to respective ones of the one or more base image items;
• and
• process the one or more pre-derived image items based, at least partially, on the one or more pre-derivation properties that has been identified.