Abstract: This disclosure provides a method for generating an optimal tree for rendering or streaming a 3D model. The method includes: obtaining a complete tree of a 3D model; obtaining a quality value of a node of the complete tree of the 3D model; obtaining a visibility value of the node of the complete tree of the 3D model; determining an optimal tree of the 3D model based on the complete tree, the quality value, and the visibility value; and rendering the 3D model based on the optimal tree.

Abstract: A volumetric video processing system and method is provided. The volumetric video processing system includes a storage circuit and a processor. The storage circuit is configured to storing a program code. The processor is coupled to the storage circuit and accessing the program code to execute: obtaining a texture of a frame of a volumetric video; generating a timecode based on a frame number of the frame; embedding the timecode into the texture to generate an embedded texture; obtaining a 3D model of the frame; and storing the embedded texture and the 3D model together as the volumetric video.

Abstract: This disclosure provides a 3D model processing system. The 3D model processing system includes a storage circuit and a processor. The storage circuit is configured to store a program code. The processor is coupled to the storage circuit and configured to access the program code to execute: obtaining a first original spatial value and a second original spatial value of a 3D model; obtaining a difference value between the first original spatial value and the second original spatial value; and generating a compressed spatial value corresponding to the second original spatial value based on the difference value.

Abstract: This disclosure provides a 3D model processing system. The 3D model processing system includes a storage circuit and a processor. The storage circuit is configured to store a program code. The processor is coupled to the storage circuit and configured to access the program code to execute: obtaining a plurality of nodes of a 3D model; splitting the 3D model into a first original partition and a second original partition based on a location or a material, wherein the first original partition comprises a first group of nodes and the second original partition comprises a second group of nodes; generating a plurality of first graded partitions of different levels of detail for the first original partition based on the first group of nodes; and generating a plurality of second graded partitions of different levels of detail for the second original partition based on the second group of nodes.