Point Group Synthesis Using Image Feature Coordinate Conversion
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Solution Overview
Problem
Existing methods for synthesizing point group data from multiple directions result in low accuracy due to the inherent low resolution of point group data, leading to inaccurate superimposition of point group data pieces.
Innovation Solution
A system and method that involves acquiring images of a working target, detecting visual characteristic points on a camera coordinate system, setting a user coordinate system based on these points, converting point group data from the camera system to the user system, and synthesizing the data on the user system, thereby increasing accuracy by referencing higher-resolution image-based points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If point group data from multiple directions are superimposed using characteristic points extraction, then the completeness of the synthesized data is improved, but the accuracy of the synthesized data deteriorates
Solution Approach 1:
The patent introduces images as an intermediary medium with high resolution to bridge the accuracy gap in point group data synthesis. By detecting characteristic points on high-resolution images and using them to establish coordinate transformations, the system transfers accurate positional information from images to the synthesized point group data, thereby maintaining both completeness and accuracy.
2Ease of manufacture
If point group data is synthesized directly from camera coordinate systems, then the processing simplicity is improved, but the synthesis accuracy deteriorates
Solution Approach 1:
The patent introduces an image-based coordinate system as an intermediary between the camera coordinate system and the final synthesized coordinate system. This intermediary layer allows for accurate characteristic point detection on high-resolution images, which then guides the coordinate transformation and synthesis process, improving accuracy without significantly complicating the overall workflow.
Solution Approach 2:
The patent performs preliminary action by detecting characteristic points on high-resolution images before synthesizing the point group data. This preliminary detection of accurate characteristic point positions on images allows the subsequent synthesis process to use these pre-determined accurate positions as reference, thereby improving the overall synthesis accuracy while keeping the process organized and manageable.
Data Source
AI summary
A point group data synthesis apparatus includes: an image acquisition unit that acquires a plurality of images including a working target; a point group acquisition unit that acquires, for each of the images, point group data on a camera coordinate system with reference to a camera that photographs the images; a detection unit that detects each position on the camera coordinate system of a visual characteristic point commonly included in the respective images; a user coordinate system setting unit that sets a user coordinate system with reference to the position on the camera coordinate system of the characteristic point detected for each of the images; a coordinate conversion unit that converts, for each of the images, the point group data on the camera coordinate system into point group data on the user coordinate system; and a point group synthesis unit that synthesizes the point group data on the user coordinate system converted for each of the images together.