Handheld Pointer Cursor Positioning with Mode Transition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Handheld remote control devices experience instability due to hand shaking or trembling, causing the cursor on a display apparatus to move unpredictably, leading to operation inconvenience when transitioning from pointer-lock mode to absolute positioning mode.
Innovation Solution
A pointer positioning method that automatically switches between absolute and relative positioning modes, using image frames to compute pointing coordinates and generate displacement vectors to smoothly transition the cursor position, preventing sudden jumps and enhancing user operation stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If absolute positioning technique is used to compute pointing position, then positioning accuracy is improved, but cursor stability deteriorates due to hand shaking
Solution Approach 1:
The system dynamically switches between pointer-lock mode and absolute positioning mode based on operational needs. During pointer-lock mode, the cursor position is fixed relative to the reference light source position, filtering out hand shaking effects. When exiting pointer-lock mode, the system transitions to absolute positioning to restore accurate pointing. This dynamic mode switching resolves the contradiction by applying different positioning strategies at different operational stages.
2Stability of the object's composition
If pointer-lock mode is used to stabilize cursor, then cursor stability is improved, but positioning accuracy deteriorates when exiting the mode
Solution Approach 1:
Before exiting pointer-lock mode, the system pre-calculates the displacement vector between the locked cursor position and the current absolute pointing position. This preliminary calculation enables a smooth transition by gradually adjusting the cursor position from the locked position to the accurate absolute position, rather than making an abrupt jump. This preliminary action resolves the contradiction by preparing the transition in advance.
3Measurement precision
If absolute positioning is used after pointer-lock mode, then positioning accuracy is improved, but operation convenience deteriorates due to cursor jumping
Solution Approach 1:
The system performs preliminary calculation of the displacement vector and implements gradual cursor position adjustment before fully transitioning to absolute positioning. This preliminary action smooths the transition process, preventing abrupt cursor jumps that would disrupt user operation. The cursor gradually moves from the pointer-locked position to the accurate absolute position, maintaining operation convenience while achieving positioning accuracy.
4Stability of the object's composition
If displacement vector calculation is implemented, then transition smoothness is improved, but computational complexity increases
Solution Approach 1:
The system calculates the displacement vector based on changes in reference light source position between pointer-lock mode and absolute positioning mode. By focusing computation on the essential parameter change (reference light position), the system achieves smooth transition without excessive computational complexity. The displacement vector calculation is simplified to only the necessary coordinate differences, resolving the contradiction between transition smoothness and computational complexity.
Data Source
AI summary
A pointer positioning method of a handheld pointer device, which includes capturing a first image frame containing a reference point to compute a first pointing coordinate according to the image position of the reference point in the first image frame; generating a cursor parameter of a cursor according to the first pointing coordinate; when the handheld pointer device enters a pointer-lock mode, records the first pointing coordinate and positions the cursor at the first pointing coordinate on a display apparatus; when the handheld pointer device exits the pointer-lock mode, captures a second image frame to compute a second pointing coordinate according to the image position of the reference point in the second image frame to obtain a displacement vector between the first and the second pointing coordinates; generating the cursor parameter and controlling the movement of the cursor according to the displacement vector and the first pointing coordinate.