Haptic Interface for 3D Scanning Camera Positioning
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Solution Overview
Problem
Current three-dimensional scanning systems face challenges in accurately controlling camera position and orientation, leading to ambiguity in data collection and reduced accuracy in reconstructing models, particularly for objects with high curvature or complex geometries like dental structures.
Innovation Solution
A haptic interface device integrated with a camera allows users to intuitively guide the scanning process through haptic guides, constraining movement to optimal positions and orientations for image acquisition, enabling real-time data collection and reconstruction of high-quality three-dimensional models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed camera focal length is used, then the camera can be positioned at optimal focal distance for precise scan data extraction, but the camera position and orientation become difficult to control accurately during scanning
Solution Approach 1:
A haptic guide is introduced as an intermediary device between the camera and the object being scanned. The haptic guide provides tactile feedback to the user, enabling intuitive control of camera position and orientation without requiring complex mechanical positioning systems. This mediator allows the user to feel the optimal scanning positions through haptic feedback while maintaining the fixed focal length for precise measurements.
Solution Approach 2:
The system implements feedback by providing haptic feedback to the user through the haptic guide. This feedback mechanism allows the user to sense the optimal camera positions and orientations in real-time, enabling accurate control of the camera without requiring complex automated positioning systems. The feedback loop continuously guides the user's hand to the correct positions for optimal scanning.
2Device complexity
If manual scanning without haptic guidance is used, then the device complexity is reduced, but the scanning accuracy and completeness are insufficient
Solution Approach 1:
The haptic guide serves as a simple intermediary device that adds minimal complexity to the scanning system while significantly improving scanning accuracy. It provides tactile feedback to guide the user's hand, ensuring complete and accurate scanning of complex geometries without requiring complex automated positioning mechanisms or multiple sensors.
Solution Approach 2:
The haptic guide enables the user to self-guide the scanning process through tactile feedback. The system leverages the user's own hand movements combined with haptic guidance to achieve accurate scanning, eliminating the need for complex automated positioning systems or specialized training. The user intuitively controls the camera position through haptic feedback alone.
3Productivity
If automated scanning systems are used, then the scanning speed increases, but the adaptability to complex geometries and high curvature surfaces decreases
Solution Approach 1:
The haptic guide provides real-time feedback to the user, enabling intuitive adaptation to complex geometries and high curvature surfaces. The tactile feedback allows the user to sense the object's shape and adjust their scanning movements accordingly, maintaining high scanning speed while achieving complete coverage of complex surfaces that automated systems struggle with.
Solution Approach 2:
The system transitions from rigid automated scanning to dynamic manual scanning guided by haptic feedback. This allows the scanning process to adapt dynamically to the object's geometry, following contours and surfaces as needed. The user can adjust their scanning path in real-time based on haptic feedback, providing flexibility for complex geometries while maintaining efficiency.
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 results in faster and more accurate scanning with reduced need for post-processing, providing detailed models with improved resolution of complex surfaces and minimizing data artifacts, suitable for dental and broader medical applications.
Implementation Method 1
a camera (21) for viewing the structured light as it strikes an object
Implementation Method 2
A haptic interface device integrated with a camera allows users to intuitively guide the scanning process through haptic guides
Data Source
AI summary
Described herein is a three-dimensional scanning system that features a camera integrated with a user-guided haptic interface device. The system allows an operator, through the sense of touch, to intuitively and interactively identify optimum locations for obtaining images or scans of an object. The system then assembles these scans to produce a virtual three-dimensional representation of the object with a high degree of accuracy and with a minimum of data artifacts.