Pyramidal Calibration Target for 3D Imaging Versatility
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Solution Overview
Problem
Conventional 3D machine vision systems based on light triangulation require frequent recalibration due to changes in camera and light source configurations, necessitating the use of multiple calibration objects for various setups, which is inefficient and time-consuming.
Innovation Solution
An imaging system utilizing a calibration target object with regular right pyramidal recesses and pyramids, where the base of at least one recess shares sides with the base of one or more pyramids, allowing for efficient detection of large, easy-to-detect surfaces that facilitate accurate calibration across different setups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional calibration objects are used for different camera and light source configurations, then calibration can be performed for each setup, but multiple calibration objects are required and frequent recalibration is needed
Solution Approach 1:
The calibration object is designed with pyramidal structures that can be effectively detected by multiple camera and light source configurations. The pyramidal recesses and pyramids create distinctive reflection patterns that work across different imaging setups, making a single calibration object universal for various configurations rather than requiring separate objects for each setup.
Solution Approach 2:
The calibration object is divided into multiple pyramidal recesses and pyramids, each providing distinct calibration features. This segmentation allows different portions of the calibration object to be effectively used with different camera and light source arrangements, enhancing the object's versatility across configurations.
2Measurement precision
If conventional calibration objects are used, then calibration can be performed, but the process is time-consuming and requires frequent recalibration
Solution Approach 1:
The calibration object is pre-designed with optimized pyramidal structures that automatically provide the necessary calibration information when imaged. The specific geometry of the pyramidal recesses and pyramids is predetermined to create distinctive reflection patterns, eliminating the need for manual calibration adjustments and reducing calibration time while maintaining precision.
3Adaptability or versatility
If multiple calibration objects are used for various setups, then each configuration can be calibrated, but the process becomes inefficient and complex
Solution Approach 1:
A single calibration object with pyramidal structures serves multiple camera and light source configurations, replacing the need for multiple specialized calibration objects. This universal design maintains configuration coverage while dramatically improving calibration efficiency by eliminating the need to swap between different calibration objects.
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
Enables efficient and accurate calibration of the imaging system, allowing it to capture 3D characteristics of target objects with improved precision and versatility across various configurations, reducing the need for multiple calibration objects and streamlining the calibration process.
Implementation Method 1
reflected light from an object to be imaged is captured by an image sensor of a camera
Implementation Method 2
3D machine vision systems are often based on such sheet of light triangulation
Data Source
AI summary
Imaging system based on light triangulation for capturing information on three dimensional characteristics of an object by means of one or more cameras. A calibration target object is within respective field of view of said cameras so that the cameras are able to detect light reflected from a surface structure of the calibration target object comprising one or more regular right pyramidal recesses and one or more regular right pyramids, with their respective bases in the same plane and their respective apexes at the same orthogonal distance from that same plane. The base of at least one of said regular right pyramidal recesses shares at least one side with the base of at least one of said regular right pyramids, such that each pair of lateral faces sharing side are located in a common plane.