Radiative Transfer Signalling For Immersive Video

A method comprising:

• segmenting volumetric video data into one or more regions;
• determining at least one radiative transfer property of the one or more regions;
• indicating the at least one radiative transfer property of the one or more regions in a sub-stream;
• and
• including the sub-stream in a bitstream configured to describe the volumetric video data.

A non-transitory computer-readable medium comprising program instructions stored thereon which, when executed with at least one processor, cause the at least one processor to:

• segment volumetric video data into one or more regions;
• determine at least one radiative transfer property of the one or more regions;
• indicate the at least one radiative transfer property of the one or more regions in a sub-stream;
• and
• include the sub-stream in a bitstream configured to describe the volumetric video data.

An apparatus comprising:

• at least one processor;
• and
• at least one non-transitory memory and computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to:
• receive a bitstream describing volumetric video data;
• extract a sub-stream from the received bitstream;
• determine whether the extracted sub-stream comprises at least one radiative transfer property for a region of the volumetric video data;
• based on a determination that the extracted sub-stream comprises the at least one radiative transfer property for the region, determine a value for the at least one radiative transfer property for the region;
• and
• render the region based on the determined value for the at least one radiative transfer property.

A method comprising:

• receiving a bitstream describing volumetric video data;
• extracting a sub-stream from the received bitstream;
• determining whether the extracted sub-stream comprises at least one radiative transfer property for a region of the volumetric video data;
• based on a determination that the extracted sub-stream comprises the at least one radiative transfer property for the region, determining a value for the at least one radiative transfer property for the region;
• and
• rendering the region based on the determined value for the at least one radiative transfer property.

A non-transitory computer-readable medium comprising program instructions stored thereon which, when executed with at least one processor, cause the at least one processor to:

• receive a bitstream describing volumetric video data;
• extract a sub-stream from the received bitstream;
• determine whether the extracted sub-stream comprises at least one radiative transfer property for a region of the volumetric video data;
• based on a determination that the extracted sub-stream comprises the at least one radiative transfer property for the region, determine a value for the at least one radiative transfer property for the region;
• and
• render the region based on the determined value for the at least one radiative transfer property.