Originally patented in 1997 as the first geometric pattern-based object location technology for machine vision, Cognex PatMax is the industry’s leading pattern-matching tool. PatMax learns an object’s geometry using a set of boundary curves that are not tied to a pixel grid, and then looks for similar shapes in the image without relying on specific gray levels. The result is a revolutionary improvement in the ability to accurately find objects despite changes in angle, size, and shading.PatMax offers three key features that distinguish it from other pattern-matching technologies:
- High-speed location of objects whose appearance is rotated, scaled, and/or stretched
- Location technology based on object shape, not on grey-scale values
- Very high accuracy and robustness
As a result, PatMax finds trained patterns in run-time images no matter what combination of transformations the pattern has undergone. Manufacturers around the world rely on PatMax to find objects whose appearance varies by size, rotation, and location.