Stereo Ranging Calibration via Optical Reflection Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Stereo ranging systems in aerial vehicles face challenges due to improper calibration and vibration-induced image quality degradation, which affects the accuracy of depth determination and requires additional weight and drag from mounting structures for imaging devices.
Innovation Solution
A method is introduced to calibrate and detect vibrations in stereo ranging systems by projecting light from a source aligned with the imaging devices and analyzing reflections within captured images, allowing for adjustments to maintain proper alignment and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If imaging devices are rigidly mounted to the aerial vehicle, then alignment stability is improved, but weight and drag increase
Solution Approach 1:
The patent replaces mechanical rigid mounting structures with an optical calibration and detection system. Instead of relying solely on heavy mechanical rigidization to prevent vibration-induced misalignment, the system uses imaging devices to detect alignment status and light projection methods to校准 the stereo rig, thereby reducing the need for excessive mechanical reinforcement and associated weight and drag.
2Stability of the object's composition
If imaging devices are rigidly mounted to the aerial vehicle, then alignment stability is improved, but drag increases
Solution Approach 1:
The patent replaces mechanical rigid mounting structures with an optical calibration and detection system. Instead of relying solely on heavy mechanical rigidization to prevent vibration-induced misalignment, the system uses imaging devices to detect alignment status and light projection methods to校准 the stereo rig, thereby reducing the need for excessive mechanical reinforcement and associated weight and drag.
3Measurement precision
If vibration detection and calibration systems are added, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent makes the imaging devices serve dual functions: they are used both for capturing images for stereo ranging measurements and for detecting alignment status of the stereo rig. The same imaging devices that capture environmental scenes also capture images of calibration targets to detect misalignment. This multi-functionality reduces the need for separate dedicated vibration detection and calibration hardware, thereby limiting the increase in system complexity while still improving measurement precision.
Solution Approach 2:
The system performs self-calibration and self-detection using its own imaging devices. The stereo rig uses its imaging devices to capture calibration targets and detect its own alignment status, and then automatically adjusts or compensates for misalignment. This self-service capability eliminates the need for external calibration equipment and manual intervention, improving measurement precision without proportionally increasing system complexity.
4Manufacturing precision
If external light sources are used for calibration, then calibration accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges the light source with the stereo rig structure, integrating it as part of the imaging system rather than using separate external calibration equipment. The light source is positioned to work in conjunction with the imaging devices, and calibration targets are incorporated into the rig structure itself. This integration reduces the number of separate components and simplifies the overall system while maintaining calibration accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures accurate stereo distance information and maintains system performance by identifying and addressing misalignments and vibrations, enhancing the reliability of depth mapping and reducing operational costs associated with imaging device mounting.
Implementation Method 1
the imaging devices capture imaging data that includes reflections of the projected light from the one or more surfaces
Data Source
AI summary
Stereo ranging systems having pairs of imaging devices may be calibrated by projecting beams of light into the fields of view of the imaging devices and comparing the appearances of reflections of the beams depicted within images captured thereby. Where the reflections appear consistently within the images, the stereo ranging systems may be determined to be calibrated and operating properly. Where the reflections do not appear consistently within the images, the stereo ranging systems may be determined to be not calibrated or not operating properly. The light sources may be light-emitting structures such as diodes or reflective objects. A vector generated based on inconsistencies in appearances of reflections within images may be used to adjust the images. Images adjusted based on such vectors may be used to determine ranges to objects depicted therein or for any other purpose.