National Instruments IMAQTM Manual Do Utilizador
Chapter 4
Performing Particle Analysis
4-6
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cwimaqMeasurementConvexHullPerimeter
Perimeter of the smallest convex
polygon containing all points in the
particle.
polygon containing all points in the
particle.
cwimaqMeasurementElongationFactor
Max Feret Diameter divided by
Equivalent Rect Short Side (Feret).
Equivalent Rect Short Side (Feret).
cwimaqMeasurementEquivalentEllipseMajorAxis
Length of the major axis of the ellipse
with the same perimeter and area as the
particle.
with the same perimeter and area as the
particle.
cwimaqMeasurementEquivalentEllipseMinorAxis
Length of the minor axis of the ellipse
with the same perimeter and area as the
particle.
with the same perimeter and area as the
particle.
cwimaqMeasurementEquivalentEllipseMinorAxisFeret
Length of the minor axis of the ellipse
with the same area as the particle, and
Major Axis equal in length to the Max
Feret Diameter.
with the same area as the particle, and
Major Axis equal in length to the Max
Feret Diameter.
cwimaqMeasurementEquivalentRectDiagonal
Distance between opposite corners of
the rectangle with the same perimeter
and area as the particle.
the rectangle with the same perimeter
and area as the particle.
cwimaqMeasurementEquivalentRectLongSide
Longest side of the rectangle with the
same perimeter and area as the particle.
same perimeter and area as the particle.
cwimaqMeasurementEquivalentRectShortSide
Shortest side of the rectangle with the
same perimeter and area as the particle.
same perimeter and area as the particle.
cwimaqMeasurementEquivalentRectShortSideFeret
Shortest side of the rectangle with the
same area as the particle, and longest
side equal in length to the Max Feret
Diameter.
same area as the particle, and longest
side equal in length to the Max Feret
Diameter.
cwimaqMeasurementFirstPixelX
X-coordinate of the highest, leftmost
particle pixel.
particle pixel.
cwimaqMeasurementFirstPixelY
Y-coordinate of the highest, leftmost
particle pixel.
particle pixel.
cwimaqMeasurementHeywoodCircularityFactor
Perimeter divided by the circumference
of a circle with the same area.
of a circle with the same area.
Table 4-1. Measurement Types (Continued)
Measurement
Description