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IMPACT Software Highlights
Subpixel Resolution
Many of the software tools in IMPACT VPM have
subpixel resolution capabilities. These tools include
Edge
Point Find, Wide Edge Point Find, Subpixel Edge
Extractor, Circle Gauge, Circle Edge Refinement, Line
Gauge, Line Gauge Datum, Line Gauge Dual ROI,
Line Find, Blob and Color Blob. IMPACT Sales
and Support representatives are often
asked by IMPACT users and perspective IMPACT
buyers
how accurately IMPACT software algorithms can
calculate subpixel points. The truth is, the
actual subpixel accuracy depends on
various
conditions including lighting, consistency of the
objects being inspected, quality of the image,
lens, optics etc.
In a tightly controlled environment,
such as a
back-lit object with a clean edge running
in a lab, we have obtained subpixel accuracy and
repeatability results
down to 1/40th of a pixel or better. The tools in
IMPACT VPM use different methodologies to
extrapolate subpixel data in different calculations,
including locating an edge point, locating a blob
centroid, and calculating the diameter of a blob.
Download the technical paper titled IMPACT -
Subpixel
Resolution to see how the
IMPACT
software handles subpixel calculations.
IMPACT - Subpixel Resolution
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