Dynamic 3D Media Projection With Ray-Cast Ground Mapping
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Solution Overview
Problem
Conventional 3D image projection methods fail to accurately project polygons onto invisible or occluded ground surfaces, complicating object detection in real-world scenarios.
Innovation Solution
A method involving 2D image data acquisition, 3D polygon detection, and ray casting to establish correspondence between 2D pixel coordinates and 3D surface coordinates, enabling precise projection of 3D polygons onto the ground segment of a 3D surface model.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If 2D monocular cameras are used for cost-effective surveillance, then device cost is reduced, but 3D perspective understanding capability deteriorates
Solution Approach 1:
The patent projects 2D image data onto a 3D surface model to reconstruct three-dimensional spatial information. By mapping 2D pixel coordinates to 3D surface coordinates through ray casting operations, the system recovers depth and spatial relationships that would otherwise be lost in monocular 2D imaging, enabling 3D perspective understanding without requiring expensive 3D sensors.
Solution Approach 2:
The patent introduces a 3D surface model as an intermediary between the 2D camera input and the desired 3D understanding. This surface model serves as a mediator that bridges the gap between limited 2D monocular data and comprehensive 3D scene comprehension, allowing the system to leverage inexpensive 2D cameras while achieving 3D analytical capabilities.
2Ease of operation
If conventional polygon projection methods are used on visible ground, then projection simplicity is maintained, but projection accuracy deteriorates in occluded scenarios
Solution Approach 1:
The patent performs preliminary segmentation of the 3D surface model into ground segments and non-ground segments before projection. By pre-identifying and isolating the ground surface geometry, the system prepares the appropriate projection target in advance, enabling accurate polygon projection even in occluded scenarios where the ground may be invisible or partially obscured in the 2D image.
Solution Approach 2:
The patent applies different processing approaches to different parts of the scene by segmenting the 3D surface into ground and non-ground portions. The polygon projection is specifically applied to the ground segment, which has been pre-processed and identified as the appropriate projection target. This localized approach ensures projection accuracy on the ground surface while maintaining simplicity by avoiding complex processing of non-ground elements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate 3D polygon projection even in occluded or invisible ground scenarios, enhancing object detection and visualization in real-world situations.
Implementation Method 1
determining, by applying a ray casting operation on the 2D images and the ground segment of the 3D surface model, correspondence information between 2D pixel coordinates in the 2D images and 3D surface coordinates of the ground segment
Data Source
AI summary
In an embodiment, dynamic multi-dimensional media content is projected. Image data including 2D images depicting view of real-world is acquired. 3D polygons are detected corresponding to objects on a ground of the 2D images. 3D surface model is segmented into 3D segments including ground segments and non-ground segments. The ground segment of the 3D surface model is extracted by removing the one or more non-ground segments from the plurality of 3D segments. Corresponding information between 2D pixel coordinates in the 2D images and 3D surface coordinates of the ground segments is determined by applying a ray casting operation on the 2D images and the ground segment of the 3D surface model. The 3D polygons are projected onto the 3D surface model based on the correspondence information.