3D Vision Sensor Repositioning for Shadowed Height Regions
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Solution Overview
Problem
Existing vision sensor systems face challenges in eliminating the effects of shadows when measuring three-dimensional shapes, as the position and attitude adjustments do not always optimize the acquisition of height information in shadowed regions.
Innovation Solution
A vision sensor system comprising an image capturing unit, movement mechanism, and movement control unit that determines a second position and attitude based on height information from a measured three-dimensional shape to improve the acquisition of data in shadowed regions, by identifying deficient regions and adjusting the camera's position and angle to minimize rotational movement and enhance data accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the camera is moved to a position rotated by a predetermined angle from the first position, then the measurement process is standardized and simplified, but the shadow effects cannot be effectively eliminated for all subject states
Solution Approach 1:
The patent transitions from a fixed predetermined rotation angle to a dynamic determination method where the second position and attitude are calculated based on actual measured three-dimensional shape data. The movement control unit determines the optimal second position by analyzing height information around deficient regions, making the system adaptive to different subject geometries and shadow conditions rather than using a static predetermined angle.
Solution Approach 2:
The system uses feedback from the measured three-dimensional shape data to determine the second position. The movement control unit analyzes the height information from the first measurement, identifies deficient regions, and calculates the optimal camera position and attitude based on this feedback to eliminate shadows in subsequent measurements.
2Measurement precision
If the camera position and attitude are adjusted to eliminate shadows, then measurement accuracy improves, but the complexity of determining the optimal position increases
Solution Approach 1:
The system uses its own measurement data to determine the optimal second position. The movement control unit analyzes the height information obtained from the first measurement and autonomously calculates the position and attitude that will eliminate shadows, without requiring external intervention or complex pre-programming of multiple fixed positions.
Solution Approach 2:
The system performs preliminary analysis of the measured three-dimensional shape data to identify deficient regions before determining the second position. By analyzing height information around these deficient regions in advance, the system can calculate the optimal camera position that will capture the shadowed areas in the next measurement.
3Reliability
If multiple measurements are performed with fixed position changes, then shadow effects are partially addressed, but the time required for measurement increases
Solution Approach 1:
The patent optimizes the measurement time by dynamically determining the second position based on actual measurement data rather than performing multiple measurements at predetermined positions. By calculating the optimal position that specifically targets deficient regions, the system reduces the number of required measurements and minimizes camera movement time while ensuring complete shape acquisition.
Data Source
AI summary
On the basis of a measured shape, which is a three-dimensional shape of a subject measured by means of a measuring unit using an image captured when an image capturing unit is disposed in a first position and a first attitude, a movement control unit determines a second position and a second attitude for capturing an image of the subject again, and sends an instruction to a movement mechanism. The three-dimensional shape is represented by means of height information from a reference surface. The movement control unit extracts, from the measured shape, a deficient region having deficient height information, and determines the second position and the second attitude on the basis of the height information around the deficient region of the measured shape. The position and attitude of the image capturing unit can be determined in such a way as to make it easy to eliminate the effects of shadows.