3D Point Cloud Initial View Angle Control via Predefined Vectors
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Solution Overview
Problem
Existing three-dimensional point cloud encapsulation methods do not consider user-specific initial presentation requirements, such as viewing a region of interest, leading to suboptimal consumption experiences.
Innovation Solution
The method and system for initial view angle control in three-dimensional point cloud media data encapsulation, which includes determining and presenting an initial viewpoint, normal vector direction, and forward direction vector, allowing for scaling and interactive adjustments based on user position and behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing three-dimensional point cloud encapsulation methods are used, then the overall presentation effect is considered, but the user's initial presentation requirements for regions of interest are not satisfied
Solution Approach 1:
The patent applies preliminary action by pre-defining initial viewpoint information, normal vector directions, and forward direction vectors during the media stream encoding phase. This allows the decoding device to directly utilize these pre-calculated parameters without performing complex real-time computations, thereby satisfying user-specific presentation requirements while avoiding excessive system complexity
Solution Approach 2:
The patent implements local quality by introducing specific directional parameters (normal vectors and forward direction vectors) that define particular regions of interest within the three-dimensional space. Instead of treating the entire point cloud uniformly, the system selectively emphasizes specific local regions through these directional indicators, enabling users to focus on areas of interest while maintaining overall presentation quality
2Ease of operation
If initial viewpoint information is added to capsule information, then user's initial presentation requirements are satisfied, but the capsule information becomes more complex
Solution Approach 1:
By pre-calculating and embedding initial viewpoint, normal vector, and forward direction vector information during encoding, the system enables easy initial view angle control at playback without requiring complex real-time processing. The decoding device simply retrieves and applies these pre-defined parameters, making operation simple while managing information complexity efficiently
Solution Approach 2:
The patent makes the capsule information structure multi-functional by incorporating parameters that serve multiple purposes: initial viewpoint positioning, region of interest definition, and presentation orientation control. This universal approach allows the same set of parameters to fulfill various presentation requirements without adding separate complex control mechanisms
Data Source
AI summary
Provided are an initial view angle control and presentation method and system based on a three-dimensional point cloud and a point cloud system. A three-dimensional media stream is read and parsed. An initial viewpoint, a normal vector and a forward direction vector in the three-dimensional media stream are parsed. A user can view an initial angle, that is, a region of interest, designated by a content producer when initially consuming three-dimensional media content. Moreover, scaling, that is, scale transformation, of the three-dimensional media content is allowed in an optimized manner. In a real-time interactive scene, the view range of the user can be adjusted based on the position of the user relative to the initial viewpoint. The freedom degree of visual media consumption is fully improved according to the interactive behavior of the user, providing an immersive user experience.