Part-Based Drawing Overlay Across Different Coordinate Systems
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Solution Overview
Problem
Existing information processing devices struggle to superimpose drawings and images with different coordinate systems, as general drawings lack detailed data for matching local features.
Innovation Solution
An information processing device that generates a provisional superimposed diagram by matching coordinate systems using provisional corresponding relationships and aggregate overlap indexes, allowing superimposition without relying on local feature data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detailed local feature data is used in the drawing to enable feature point matching, then superimposition accuracy is improved, but the drawing complexity and data requirements increase significantly
Solution Approach 1:
The invention extracts only the necessary geometric information (coordinates of parts) from the drawing without requiring detailed local feature data. By focusing on part-level geometric correspondence rather than detailed surface features, the method achieves superimposition accuracy while avoiding the complexity of detailed drawing data
Solution Approach 2:
The invention changes the matching parameters from local feature descriptors (which require detailed data) to part-level geometric parameters (coordinates and positions). This parameter transformation allows using simple general drawings while maintaining superimposition capability through coordinate-based matching
2Ease of manufacture
If general drawings without detailed data are used, then ease of manufacture and adaptability are improved, but the ability to perform superimposition processing deteriorates
Solution Approach 1:
The invention makes the superimposition method universal by enabling it to work with general drawings that are already in common use. The part-based matching approach works with any drawing that contains basic geometric information about parts, making the method broadly applicable without requiring specialized detailed drawings
Solution Approach 2:
The invention segments the drawing into discrete parts and matches parts between the drawing and the photograph rather than attempting to match continuous detailed features. This segmentation allows using simple general drawings while maintaining superimposition capability through part-level correspondence
3Measurement precision
If feature point matching is performed using local features, then superimposition accuracy is improved, but the method becomes inapplicable to general drawings lacking detailed feature data
Solution Approach 1:
Instead of extracting local features from both the drawing and photograph to find matching feature points, the invention inverts the approach by using part coordinates from the drawing to directly locate and match parts in the photograph. This inversion eliminates the need for detailed feature data in the drawing while maintaining matching capability
Data Source
AI summary
Even when a drawing is a general one, processing for displaying the drawing and an image having a coordinate system different from that of the drawing in a superimposed manner is performed. A provisional superimposed diagram(s) is generated by using information about the parts in the drawing and information about parts in the image, overlap indexes showing overlaps between the parts in the drawing and the parts in the image are calculated to determine the parts in the image corresponding to the parts in the drawing in the provisional superimposed diagram(s), and an aggregate overlap index(es) in the provisional superimposed diagram(s) are calculated by summing the overlap indexes to determine a corresponding relationship between the parts in the drawing and the parts in the image on the basis of the aggregate overlap index(es).