Method and apparatus for extracting outlines from 3D images

By generating 2D outlines from specified regions of 3D point clouds, the method addresses inefficiencies in processing large 3D data sets, enhancing machine vision applications through reduced complexity and improved performance.

JP2026086411APending Publication Date: 2026-05-26COGNEX CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
COGNEX CORP
Filing Date
2026-01-08
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing machine vision techniques face inefficiencies in processing large 3D point clouds due to the lack of spatial relationship information, leading to complex and resource-intensive processing, especially when time or hardware constraints are present.

Method used

A method to generate a 2D outline from a 3D point cloud by specifying a region of interest, projecting 3D points onto a 2D plane, binning and quantizing these points, and connecting their representation positions to form a polyline.

Benefits of technology

This approach reduces data complexity, improving processing efficiency and enabling applications such as feature extraction, metrology, and defect inspection by converting 3D point clouds into manageable 2D outlines.

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Abstract

This invention provides a method, apparatus, and computer-readable medium for determining the two-dimensional (2D) outline of a portion of a three-dimensional (3D) point cloud. [Solution] The method determines a 3D region of interest. The 3D region of interest includes a width along a first axis, a height along a second axis, and a depth along a third axis. The method also represents the 3D points within the 3D region of interest as a set of 2D points based on the coordinate values ​​of the first and second axes, groups the 2D points into a plurality of 2D bins arranged along the first axis, determines a 2D representation position for each 2D bin based on the associated set of 2D points, and connects each of the 2D representation positions to adjacent 2D representation positions to generate a 2D outline.
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