3D Model-Based Projection Mapping for Positional Deviation
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Solution Overview
Problem
Current projection mapping technologies face challenges in accurately and efficiently projecting two-dimensional images onto three-dimensional targets without positional deviation, requiring significant time and effort to adapt to changes in projection device or target positions, especially when multiple devices are involved.
Innovation Solution
An image projection method and apparatus that acquires a projection device viewpoint image, prepares a three-dimensional model of the target, converts it into a two-dimensional image to match the projection device's viewpoint, and overlays it for accurate projection, using a coordinate correspondence calculation unit, projection device viewpoint image generation unit, three-dimensional model unit, parameter calculation unit, and overlaid image creation unit to ensure precise alignment and adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two-dimensional images are projected onto three-dimensional targets using conventional projection mapping, then projection contents can be displayed on complex surfaces, but significant time and effort are required to create and position projection contents accurately
Solution Approach 1:
The patent transforms the projection workflow from traditional 2D-to-3D mapping to a 3D model-based approach. By creating a three-dimensional model of the projection target and generating projection contents in 3D space, the system automatically handles the conversion to 2D projection images. This dimensional approach eliminates manual positioning and coordinate conversion, significantly reducing creation time and effort while maintaining accurate alignment with the physical target.
2Illumination intensity
If multiple projection devices are used to secure sufficient light and avoid unnatural shades, then projection quality improves, but significant time and effort are required to position multiple devices without deviation
Solution Approach 1:
The patent creates a universal 3D model representation that serves as a common reference framework for multiple projection devices. Each device's projection contents are generated based on its specific viewpoint relative to the shared 3D model, automatically ensuring proper positioning and alignment. This universal modeling approach eliminates the need for complex manual positioning of each device, as the system calculates optimal positions and orientations based on the 3D model and device viewpoints.
3Adaptability or versatility
If the arrangement of projection devices or position of projection target is changed, then adaptability improves, but projection contents must be greatly modified requiring significant time and effort to adapt again
Solution Approach 1:
The patent implements a dynamic projection content generation system where the 3D model serves as a flexible foundation. When the projection target or device positions change, the system automatically recalculates the projection contents by generating new 2D images from the updated 3D model and device viewpoints. This dynamic approach eliminates the need for manual modification of projection contents, as the system adapts automatically to position changes while maintaining accurate alignment with the physical target.
4Measurement precision
If conventional projection mapping is used with two-dimensional images, then projection can be performed on three-dimensional targets, but accurate positioning without deviation is difficult to achieve
Solution Approach 1:
The patent creates a digital 3D model copy of the physical projection target, which serves as an accurate virtual reference. By generating projection contents based on this precise digital model and the specific viewpoints of projection devices, the system automatically achieves accurate positioning without deviation. This copying approach eliminates manual positioning complexity, as the 3D model inherently contains all geometric information needed to generate correctly aligned projection images for any device position.
Data Source
AI summary
A projection device viewpoint image of a three-dimensional projection target is acquired, a three-dimensional model corresponding to the projection target is prepared as projection contents, the three-dimensional model is converted into a two-dimensional image that coincides with the projection device viewpoint image, and the two-dimensional image that coincides with the projector viewpoint image is projected to the projection target.