3D Vision Sensor Parameter Setting for Variable Camera Orientation
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Solution Overview
Problem
Existing imaging devices struggle to accurately calculate the three-dimensional position of a target object when the camera's orientation changes, due to the need for setting an infinite number of parameters in the calculation model.
Innovation Solution
An imaging device equipped with a vision sensor, a gravity direction detecting unit, an orientation detecting unit, a parameter setting unit, and a storage part that sets parameters for calculating a three-dimensional position based on the direction of gravity, orientation of the vision sensor, and stored setting information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the camera orientation is changed to detect target objects in various directions, then the versatility of the imaging device is improved, but the three-dimensional position calculation accuracy deteriorates due to parameter displacement
Solution Approach 1:
The patent dynamically changes the parameters of the calculation model based on the detected camera orientation. When the orientation changes, the system automatically adjusts parameters such as focal length, principal point coordinates, and distortion coefficients to match the new orientation, thereby maintaining calculation accuracy across different viewing angles without requiring manual reconfiguration
Solution Approach 2:
The system automatically detects the camera orientation using orientation detection means and self-adjusts the calculation model parameters without external intervention. The parameter setting means automatically selects or computes appropriate parameters based on the detected orientation, enabling the system to serve itself and maintain accuracy across varying orientations
2Measurement precision
If parameters are set for each camera orientation to maintain calculation accuracy, then the measurement precision is improved, but the device complexity increases due to the need for infinite parameters
Solution Approach 1:
The patent employs a universal calculation model that can function across all camera orientations by using orientation-dependent parameters. Instead of creating separate calculation models for each orientation, a single multi-functional model adapts its parameters based on the detected orientation, thereby maintaining accuracy without requiring infinite separate parameter sets
Solution Approach 2:
The system transitions from static parameters to dynamic parameters that change with camera orientation. The parameter setting means continuously or periodically updates the calculation model parameters based on real-time orientation detection, making the parameter set adaptive rather than fixed, thus reducing the need for pre-configuring parameters for every possible orientation
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
The imaging device can accurately detect the three-dimensional position of a target object in response to the orientation of the vision sensor with simple control, eliminating the need for fixing the camera's orientation and expanding the range of robot operation.
Implementation Method 1
a gravity direction detecting unit for detecting a direction of gravity
Data Source
AI summary
This imaging device comprises: an orientation detection unit that detects the orientation of a camera with respect to the direction of gravity; and a parameter setting unit that sets parameters for calculating a three-dimensional position corresponding to a specific position in an image captured by the camera. A storage unit stores setting information for setting parameters corresponding to the orientation of the camera. The parameter setting unit sets parameters on the basis of the direction of gravity, the orientation of the camera, and the setting information.