Coordinate Offset Calibration for Cross-System Tracking Alignment
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Solution Overview
Problem
Existing interactive devices and tracking apparatuses often have different initial positioning conditions and coordinate systems, leading to incorrect data transfer and reduced user experience due to lack of offset calibration.
Innovation Solution
A coordinate system offset calculating apparatus and method that generates virtual calibration coordinates and receives sensing coordinates from a tracking apparatus to calculate the offset between different coordinate systems, using a processor to determine displacement, angle, and scale differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different positioning methods are used for interactive device and tracking apparatus, then positioning flexibility is improved, but coordinate system alignment accuracy deteriorates
Solution Approach 1:
The patent transforms the coordinate system alignment problem by changing parameters: it converts physical coordinate system offsets into virtual calibration coordinates that can be mathematically transformed. The system uses parameter transformation matrices to convert coordinates between different coordinate systems, allowing flexible positioning methods while maintaining alignment accuracy through mathematical parameter adjustments rather than physical adjustments.
2Device complexity
If offset calibration is not performed between coordinate systems, then device complexity is reduced, but data transfer accuracy deteriorates
Solution Approach 1:
The patent implements preliminary action by pre-establishing transformation relationships between coordinate systems. Instead of requiring complex real-time calibration, the system pre-calculates and stores transformation parameters that can be directly applied during data transfer. This preliminary setup simplifies the operational complexity while ensuring accurate coordinate transformation and data transfer between devices.
3Measurement precision
If multiple virtual calibration coordinates are generated for offset calculation, then coordinate system alignment accuracy is improved, but calculation complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the coordinate system alignment problem into discrete calibration points. Instead of attempting to align entire coordinate systems at once, the system segments the space into multiple virtual calibration coordinates and calculates offsets for each point independently. This segmentation allows accurate offset calculation through multiple discrete measurements while managing computational complexity by processing each point separately rather than solving a complex continuous problem.
Data Source
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AI summary
A coordinate system offset calculating apparatus, method, and non-transitory computer readable storage medium thereof are provided. The apparatus generates at least two virtual calibration coordinates, and the at least two virtual calibration coordinates correspond to a first coordinate system. The apparatus receives at least two sensing coordinates from a tracking apparatus in response to the tracking apparatus moving to the at least two virtual calibration coordinates, the at least two sensing coordinates are generated by the tracking apparatus, and the at least two sensing coordinates correspond to a second coordinate system. The apparatus calculates a coordinate system offset corresponding to the first coordinate system and the second coordinate system based on the at least two virtual calibration coordinates and the at least two sensing coordinates.