VR Camera Exposure Center Point Alignment via VTS Adjustment
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Solution Overview
Problem
Existing VR systems with optical tracking requirements face challenges in aligning exposure center points of multiple cameras due to differing exposure parameters, especially when additional cameras are added to address handle blind spots, making it difficult to achieve consistent alignment.
Innovation Solution
A method and system that divide image data into first and second type frames, adjusting VTS data of each frame type to align exposure center points by fixing time intervals between synchronization signals, ensuring consistent exposure parameters for different cameras.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple cameras are added to address handle blind spots, then the Field of View coverage is improved, but the alignment of exposure center points becomes more difficult due to different exposure parameters
Solution Approach 1:
The patent changes the timing parameters (VTS data) of the cameras to compensate for different exposure parameters. By adjusting the vertical timing start data of each camera, the exposure center points are aligned to the same timing position, resolving the contradiction between expanded FOV coverage and exposure alignment difficulty
Solution Approach 2:
The patent introduces a timing synchronization mechanism as an intermediary between cameras with different exposure parameters. The VTS data adjustment acts as a mediator that coordinates the exposure timing of multiple cameras, enabling alignment despite different individual exposure settings
2Measurement precision
If different exposure parameters are set for each camera, then the image quality for specific tracking objects is improved, but the alignment of exposure center points deteriorates
Solution Approach 1:
The patent changes the timing parameters (VTS data) of the cameras to compensate for different exposure parameters. By adjusting the vertical timing start data of each camera, the exposure center points are aligned to the same timing position, resolving the contradiction between expanded FOV coverage and exposure alignment difficulty
Solution Approach 2:
The patent performs preliminary adjustment of VTS data for each camera before actual operation. By pre-calculating and setting the appropriate VTS values based on each camera's exposure parameters, the system ensures alignment is achieved before tracking begins, maintaining both tracking precision and alignment
3Manufacturing precision
If two cameras are used with same exposure parameters, then the exposure center points can be aligned, but the handle blind spot problem becomes more obvious
Solution Approach 1:
The patent segments the camera system into multiple cameras positioned at different locations (upper, lower, left, right sections). Each camera is assigned specific exposure parameters optimized for its position, and through VTS data adjustment, their exposure center points are aligned, thus eliminating blind spots while maintaining alignment
Solution Approach 2:
The patent applies local quality by allowing each camera to have different exposure parameters suited to its specific position and lighting conditions. The VTS data adjustment ensures that despite these local differences, all cameras contribute to a unified, aligned exposure center point, covering previously blind areas
Data Source
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AI summary
The present invention provides a method for aligning exposure center points of multiple cameras in a VR system, comprising: acquiring image data of a first type frames according to a preset frame rate, the first type frames being used to track external objects, and exposure parameters of individual cameras during tracking being dynamically changed according to changes in the external objects; adjusting VTS data of the first type frame, the VTS data being changed as the change of the exposure parameters, to fix the time interval between exposure center points of the first type frames and a FSIN synchronization signal in the VR system; acquiring image data of the second type frames according to the preset frame rate, the second type frames being used to track the optical handle, and exposure parameters of individual cameras during tracking are consistent; and adjusting VTS data of the second type frames according to the VTS data of the first type frames, and fixing the time interval between exposure center points of the second type frames and the FSIN synchronization signal, to complete the alignment of exposure center points of the cameras.