Component Image Processing Apparatus for Position Measurement
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Solution Overview
Problem
Conventional methods for imaging and measuring components larger than a camera's field of view are inefficient, requiring repeated camera movements and resulting in increased image processing cycle time and reduced measurement accuracy due to deviations in camera distance and imaging magnification.
Innovation Solution
A component image processing apparatus that determines imaging ranges for characteristic parts of a component, combines images of these parts to create a combined image, and measures the component's position based on this image, allowing for accurate measurement and reduced processing time by focusing on key features rather than the entire area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the entire area of the component is divided into multiple divisional areas for imaging, then the component position measurement can be performed, but the image processing cycle time increases due to repeated camera movements
Solution Approach 1:
The patent extracts and images only the characteristic parts (corners or corners and centers) of the component rather than dividing and imaging the entire component area. This selective imaging of key characteristic parts reduces the number of imaging operations from multiple divisional areas to just one or two characteristic parts, thereby reducing the image processing cycle time while still enabling accurate component position measurement through coordinate transformation based on the imaged characteristic parts
Solution Approach 2:
The patent applies partial action by imaging only the necessary characteristic parts (corners or corners and centers) of the component instead of performing complete imaging of all divisional areas. This partial imaging approach provides sufficient information for position measurement without the time cost of complete area imaging, resolving the contradiction between measurement precision and processing time
2Loss of time
If only a part of the component is imaged to reduce processing time, then the image processing cycle time decreases, but the component position measurement accuracy degrades due to unrecognized deviations in imaging magnification
Solution Approach 1:
The patent uses the imaged characteristic parts (corners and/or centers) as reference points to detect and recognize deviations in imaging magnification and camera distance. By establishing coordinate relationships between these characteristic parts and the component's coordinate system, the system provides feedback on imaging conditions and compensates for deviations, thereby maintaining measurement accuracy even when only partial imaging is performed
Solution Approach 2:
The characteristic parts of the component serve as intermediary reference points between the camera and the full component. These characteristic parts enable the system to infer information about the entire component's position and imaging conditions without imaging the complete area, acting as mediators that bridge partial imaging and complete component measurement
3Productivity
If only characteristic parts are imaged instead of the entire component, then the image processing cycle time is reduced, but the imaging system must accurately recognize deviations in camera distance and imaging magnification
Solution Approach 1:
The patent performs preliminary action by pre-establishing the coordinate relationships and transformation rules between the characteristic parts (corners and centers) and the component's coordinate system. This preliminary setup enables the system to quickly calculate component position from minimal imaging data without requiring complex real-time analysis, thereby improving productivity while maintaining the ability to detect deviations
Data Source
AI summary
To image a component larger than the field of view of a camera, a range based on the shape and dimension of the component to be imaged and the field of view of the camera, a range of the component is divided, and imaging ranges of a plurality of characteristic parts to be imaged are determined. Then, images of the plurality of characteristic parts obtained by imaging the plurality of characteristic parts with the camera are combined to create a combined image of the characteristic parts of the component. Based on the combined image, the position of the component is measured.