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PPC (Particles Per Chain): The number of particles that were grouped into one particle based on the
nearest neighbor distance. (integer > 0; always 1 if nearest neighbor distance is 0)
Perimeter: Total length of the edges making up a particle including the edges of any holes. (real > 0)
Ratio Blue/Green: Average Blue / Average Green. (real ≥ 0)
Ratio Red/Blue: Average Red / Average Blue. (real ≥ 0)
Ratio Red/Green: Average Red / Average Green. (real ≥ 0)
Roughness: A measure of the unevenness or irregularity of a particle's surface-the ratio of perimeter to
convex perimeter. (real ≥ 1; 1 is the value for a filled shape with convex perimeter; larger values are for
particles that have interior holes and/or a non-convex perimeter)
Scatter Area: Area of the peak of the scatter detector measured over the width. (real ≥ 0)
Scatter Peak: Peak value read from the scatter detector. (real ≥ 0)
Scatter Width: Sample width of scatter detector values above the scatter threshold. (real ≥ 0)
Sigma Intensity: Standard deviation of grayscale values. (real ≥ 0)
Source Image: The camera image number or raw file image number where the particle was captured.
(integer > 0)
Sum Intensity: Sum of grayscale pixel values. (real > 0)
Time: The time that the image was captured.
Timestamp: The time the image was captured in milliseconds.
Transparency: 1 – (ABD Diameter / ESD Diameter). (real [0, 1]; 0 is the value for a filled circle;
values near 1 are for an elongated or irregular shape or a shape that has many interior holes)
Volume (ABD): Sphere volume calculated from ABD Diameter. (real > 0)
Volume (ESD): Sphere volume calculated from ESD Diameter. (real > 0)
Width: The minimum value of 36 feret measurements. (real > 0)