Drone Zoom Control for Accurate Visual SLAM Position Estimation
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Solution Overview
Problem
Drone self-position estimation accuracy is compromised due to the trade-off between viewing angle and spatial resolution, especially when operating at varying altitudes and speeds, as the distance to subjects becomes longer, making it difficult to define a distance to the subject accurately.
Innovation Solution
A moving body equipped with an imaging unit having a zoom lens, where the zoom parameter is adjusted based on altitude and moving speed to optimize viewing angle and spatial resolution, allowing for high-accuracy self-position estimation through Visual SLAM technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the viewing angle is increased to capture subjects at long distances, then the coverage area is improved, but the spatial resolution (distance accuracy) deteriorates
Solution Approach 1:
The patent applies dynamics by making the zoom magnification variable rather than fixed. The imaging control unit dynamically adjusts the zoom magnification based on the drone's altitude and moving speed, allowing the system to adapt to changing flight conditions and maintain optimal spatial resolution across different coverage areas
Solution Approach 2:
The patent changes the optical parameters of the imaging system by adjusting the zoom magnification according to altitude and speed parameters. This parameter adjustment resolves the contradiction by optimizing the balance between coverage area and spatial resolution for different flight scenarios
2Measurement precision
If the zoom magnification is increased to improve spatial resolution, then the distance accuracy is improved, but the viewing angle decreases
Solution Approach 1:
The system dynamically adjusts zoom magnification based on real-time altitude and speed data, allowing the drone to maintain high distance accuracy when needed while preserving wider viewing angles during other flight phases
Solution Approach 2:
The patent modifies the optical parameters adaptively by changing zoom magnification according to flight conditions, resolving the trade-off between distance accuracy and viewing angle through context-dependent parameter optimization
3Device complexity
If a fixed focal length is used to simplify the imaging system, then the device complexity is reduced, but the adaptability to varying altitudes and speeds deteriorates
Solution Approach 1:
The patent introduces dynamic control of zoom magnification through an imaging control unit that responds to altitude and speed changes, enhancing system adaptability without significantly increasing physical complexity
Solution Approach 2:
The system achieves adaptability through parameter changes in the optical system (zoom magnification) controlled by processing flight data, providing versatility while maintaining relatively simple hardware architecture
Data Source
AI summary
The present disclosure relates to a moving body, a position estimation method, and a program capable of achieving high accuracy of self-position estimation. An imaging control unit sets a zoom parameter of an imaging unit having a zoom lens according to at least any one of an altitude or a moving speed of its own machine, and a self-position estimation unit estimates a self-position on the basis of an image captured by the imaging unit in which the zoom parameter is set. Technology according to the present disclosure can be applied to, for example, a moving body such as a drone.