Air Mouse Cursor Positioning via Camera Deflection Angle
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Solution Overview
Problem
Current air mice for network television are costly and suffer from inaccuracies in cursor positioning due to the use of gyroscopes and acceleration detection devices, leading to a larger error between the air mouse coordinates and the originally-calibrated coordinates.
Innovation Solution
A method and system that utilize a camera device to obtain current position parameters, including a deflection angle and direction, of an air mouse with reference points to accurately determine the cursor position on a video terminal, reducing complexity and improving accuracy by using a preset scale parameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gyroscopes and acceleration detection devices are used in air mouse, then the air mouse can control moving speeds and positions, but the cost increases and positioning accuracy decreases
Solution Approach 1:
The patent extracts and removes the complex gyroscope and acceleration detection devices from the air mouse system. Instead, it uses a simplified approach where the video terminal's camera detects the air mouse's position and calculates deflection angles directly, eliminating unnecessary components while maintaining positioning functionality
Solution Approach 2:
The patent replaces the mechanical sensing system (gyroscopes and acceleration detectors) with an optical-mathematical system. The video terminal uses camera imaging to capture the air mouse's position, then applies geometric calculations (deflection angle formulas) to determine cursor movement, substituting mechanical measurement with optical detection and mathematical computation
2Ease of operation
If gyroscopes and acceleration detection devices are used in air mouse, then the air mouse can control moving speeds and positions, but the cost increases
Solution Approach 1:
The patent employs inexpensive components on the video terminal side (camera and processor) to replace expensive specialized sensors in the air mouse. The air mouse itself becomes a simpler, cheaper device while the video terminal performs the complex calculation work, effectively transferring the cost burden from the portable air mouse to the stationary video terminal
3Measurement precision
If gyroscopes and acceleration detection devices are used in air mouse, then the air mouse can control moving speeds and positions, but the error between coordinates increases
Solution Approach 1:
The patent implements a feedback mechanism where the video terminal continuously monitors the air mouse's position through the camera, calculates the deflection angle relative to the original calibration position, and uses this information to accurately determine cursor movement. This closed-loop approach maintains coordinate accuracy by constantly referencing the original calibration data
Solution Approach 2:
The patent transforms the coordinate problem from direct sensor measurement into a geometric calculation problem. By using the camera to capture the air mouse's position in image space and then calculating deflection angles through trigonometric relationships, the system maintains coordinate accuracy without relying on physical sensors that introduce error
Data Source
AI summary
The present disclosure provides a method, a video system, and a system for realizing a simple air mouse. The method includes: a video terminal obtaining current position parameters of an air mouse, wherein the current position parameters comprise a deflection angle and a deflection direction of the air mouse with respect to an originally-calibrated coordinate position; and determining a position of a cursor on the video terminal according to the current position parameters and a preset scale parameter. By presetting reference points in the air mouse, the present disclosure obtains the deflection angle and the deflection direction of the air mouse with respect to the original position by the camera device based on the above reference points, and determines the position of the cursor on the video terminal according to the deflection angle and the deflection direction and the preset scale parameter.