3D Camera Calibration Rail with Multi-Feature Target
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Solution Overview
Problem
There is no industry standard for benchmarking the performance of 3D imaging systems, which makes it difficult to evaluate and compare different systems effectively, as they are typically assessed based on varying characteristics such as noise and uniformity, sharpness, and motion artifacts.
Innovation Solution
A calibration setup and logic system that includes a mount for a 3D camera, a calibration target, and a rail, where the processing device receives readings from the camera and applies corrections to measurements using calibration targets with varying configurations, such as flat, tilted stepped, and rotating targets, to quantify and correct for characteristics like distance error, sharpness, and motion artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different evaluation metrics are used for different 3D imaging systems, then each system can be assessed based on its specific characteristics, but there is no industry standard for benchmarking performance
Solution Approach 1:
The patent creates a universal calibration target that can be used to evaluate multiple different characteristics of 3D imaging systems (noise, uniformity, sharpness, frequency response, motion artifacts) through a single standardized device. The target includes various geometric features that can assess different system parameters, providing both adaptability for different evaluation needs and consistency through standardization.
2Adaptability or versatility
If multiple calibration targets are used to measure different characteristics, then comprehensive system evaluation is possible, but the device complexity increases
Solution Approach 1:
The patent combines multiple calibration features into a single integrated calibration target. The target includes flat regions for noise/uniformity measurement, stepped regions for sharpness/frequency response, and rotating propeller regions for motion artifact evaluation. This merging approach maintains comprehensive measurement capability while reducing setup complexity by eliminating the need for multiple separate calibration devices.
Solution Approach 2:
The single calibration target serves multiple functions by incorporating different geometric features that can evaluate various system characteristics. The same physical target can be used to measure noise, uniformity, sharpness, frequency response, and motion artifacts, providing versatility without requiring multiple specialized calibration devices.
3Ease of operation
If manual calibration procedures are used, then flexibility in evaluation is maintained, but time consumption increases
Solution Approach 1:
The calibration target is pre-designed with specific geometric features (flat regions, stepped regions, rotating propellers) that are optimized for measuring different system characteristics. This preliminary preparation of the calibration target allows for automated or semi-automated evaluation processes, reducing the time required for manual calibration while maintaining evaluation flexibility through the predefined feature set.
Data Source
AI summary
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, relating to testing three-dimensional imaging systems. In some implementations, a system includes a mount for a three-dimensional camera, a mount for a calibration target, and a rail to which the mount for the calibration target is coupled. The movement of the mount for the calibration target is constrained to the direction extending along the rail. The system includes a processing device having logic that receives a reading from a particular three-dimensional camera coupled to the mount for the three-dimensional camera. The reading includes a distance from the three-dimensional camera to a particular calibration target coupled to the mount for the calibration target. The logic receives a measurement of an actual distance from the particular three-dimensional camera to the particular calibration target. The logic then provides measurement characteristics of the particular three-dimensional camera.