National Instruments IMAQ Vision for Measurement Studio - Manual (Page 45)

Chapter 4 Blob Analysis
IMAQ Vision for LabWindows/CVI User Manual 4-6 ni.com
IMAQ_MAX_SEGMENT_LEFT_COLUMN leftmost x-coordinate of longest horizontal line segment
in a particle
IMAQ_MAX_SEGMENT_TOP_ROW y-coordinate of longest horizontal line segment
IMAQ_PERIMETER length of the outer contour of the particle in user-defined
units
IMAQ_PERIMETER_OF_HOLES perimeter of all holes in user-defined units
IMAQ_SIGMA_X sum of the x-coordinates for each pixel of the particle
IMAQ_SIGMA_Y sum of the y-coordinates for each pixel of the particle
IMAQ_SIGMA_XX sum of the squared x-coordinates for each pixel of the
particle
IMAQ_SIGMA_YY sum of the squared y-coordinates for each pixel of the
particle
IMAQ_SIGMA_XY sum of the product of the x-coordinate and y-coordinate
for each pixel of the particle
IMAQ_PROJ_X sum of the vertical segments in a particle
IMAQ_PROJ_Y sum of the horizontal segments in a particle
IMAQ_INERTIA_XX inertia matrix coefficient in XX
IMAQ_INERTIA_YY inertia matrix coefficient in YY
IMAQ_INERTIA_XY inertia matrix coefficient in XY
IMAQ_MEAN_H mean length of horizontal segments
IMAQ_MEAN_V mean length of vertical segments
IMAQ_MAX_INTERCEPT length of the longest segment of the convex hull of the
particle
IMAQ_MEAN_INTERCEPT mean length of the chords in a particle perpendicular to
its max intercept
IMAQ_ORIENTATION direction of the major axis of a particle
IMAQ_EQUIV_ELLIPSE_MINOR total length of the minor axis of the ellipse having the
same area as the particle and a major axis equal to half
the max intercept
Table 4-1. Particle Measurements (Continued)
Measurement Description