Variable-Baseline Stereo Camera Control for Multi-Distance Imaging
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Solution Overview
Problem
Stereo camera systems face a trade-off between accurately imaging short-distance objects and long-distance objects due to the fixed base length between imaging units, making it difficult to achieve high performance in both aspects simultaneously.
Innovation Solution
A moving body equipped with a stereo camera system that includes a base length changing unit, allowing the base length between the first and second imaging units to be adjusted dynamically based on a state variable indicating the current imaging state, thereby optimizing the imaging range for both short-distance and long-distance objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the base length between imaging units is long, then distance measurement accuracy for long-distance objects is improved, but the ability to image short-distance objects deteriorates
Solution Approach 1:
The patent makes the base length dynamic through the base length changing unit, which adjusts the distance between imaging units based on the target imaging distance. When the target is at long distance, the base length is extended to improve measurement accuracy. When the target is at short distance, the base length is shortened to include the object within the imaging range. This dynamic adjustment resolves the contradiction between long-distance measurement accuracy and short-distance imaging capability.
Solution Approach 2:
The system changes the base length parameter according to the imaging distance to the target object. The moving body control unit determines the appropriate base length based on calculated imaging distance, and the base length changing unit adjusts the physical configuration accordingly. This parameter change enables the system to adapt to different imaging scenarios, resolving the trade-off between long-distance accuracy and short-distance accessibility.
2Device complexity
If a single stereo camera is used, then device complexity is reduced, but the ability to achieve high imaging performance for both short-distance and long-distance objects deteriorates
Solution Approach 1:
The patent applies dynamics by introducing a movable base length mechanism to a single stereo camera system. Instead of using multiple fixed-base stereo cameras, the system dynamically adjusts the base length of one stereo camera to match the imaging distance. This dynamic adjustment enables a single camera system to achieve the performance that would otherwise require multiple cameras, resolving the contradiction between device simplicity and imaging performance.
Solution Approach 2:
The system changes the base length parameter of the stereo camera based on the target imaging distance. The moving body control unit calculates the required base length and the base length changing unit adjusts the physical configuration accordingly. This parameter change allows a single stereo camera to adapt its performance characteristics, eliminating the need for multiple cameras while maintaining high imaging performance across different distances.
Data Source
AI summary
Provided is a moving body that includes a stereo camera including a first imaging unit and a second imaging unit. The moving body further incudes a base length changing unit that moves at least one of the first imaging unit and the second imaging unit so as to change a base length between the first imaging unit and the second imaging unit, and a moving body control unit that controls the base length changing unit such that the base length is adjusted to a target base length according to a state variable indicating information of a variable imaging state of the first imaging unit and the second imaging unit.