Parameter Property

NI Vision for Visual Basic

Parameter Property

Syntax

CWIMAQParticleSelectionDataItem.Parameter

Data Type

CWIMAQParticleParameters

You can use the following constants with this data type:

  • cwimaqParticleArea—Surface area of the particle in pixels.
  • cwimaqParticleAreaCalibrated—Surface area in user-defined units.
  • cwimaqParticleAreaScanned—Surface area of the image in user-defined units.
  • cwimaqParticleAreaTotal—Total surface area occupied by a particle and its holes in user-defined units.
  • cwimaqParticleCenterMassX—X-coordinate of the center of gravity of the particle.
  • cwimaqParticleCenterMassY—Y-coordinate of the center of gravity of the particle.
  • cwimaqParticleCompactness—Compactness factor--particle area/(height × width).
  • cwimaqParticleDiagonal—Diagonal of an equivalent rectangle in user-defined units.
  • cwimaqParticleEllipseMajor—Length in calibrated units of the major axis of an ellipse that has the same area and perimeter as the particle.
  • cwimaqParticleEllipseMinor—Length in calibrated units of the minor axis of an ellipse that has the same area and perimeter as the particle.
  • cwimaqParticleElongation—Elongation factor—max intercept/mean perpendicular intercept.
  • cwimaqParticleEquEllipseMinor—Length of the minor axis of an ellipse that has the same area as the particle and a major axis equal to half the max intercept of the particle.
  • cwimaqParticleHeywood—Particle perimeter/perimeter of a circle with the same area as the particle.
  • cwimaqParticleHoleArea—Total surface area of all holes in user-defined units.
  • cwimaqParticleHoleNumber—Number of holes in the particle.
  • cwimaqParticleHolePerimeter—Total perimeter length of all the holes in a particle in user-defined units.
  • cwimaqParticleHydraulicRadius—Hydraulic radius in user-defined units--particle area / particle perimeter.
  • cwimaqParticleIXX—Inertia matrix coefficient in XX.
  • cwimaqParticleIXY—Inertia matrix coefficient in XY.
  • cwimaqParticleIYY—Inertia matrix coefficient in YY.
  • cwimaqParticleMaxIntercept—Length of longest segment of the convex hull.
  • cwimaqParticleMaxSegment—Length of longest horizontal line segment.
  • cwimaqParticleMaxSegmentX—Leftmost x-coordinate of longest horizontal line segment.
  • cwimaqParticleMaxSegmentY—Leftmost y-coordinate of longest horizontal line segment.
  • cwimaqParticleMeanChordX—Mean length of horizontal segments.
  • cwimaqParticleMeanChordY—Mean length of vertical segments.
  • cwimaqParticleMeanIntercept—Mean length of the chords in a particle perpendicular to the max intercept.
  • cwimaqParticleOrientation—The orientation based on the inertia of the pixels in the particle. For more information, refer to Chapter 10, Particle Measurements, of the NI Vision Concepts Manual.
  • cwimaqParticlePerimeter—Perimeter length of a particle in user-defined units.
  • cwimaqParticleProjectionX—The length of the particle when projected onto the x-axis.
  • cwimaqParticleProjectionY—The length of the particle when projected onto the y-axis.
  • cwimaqParticleRatioAreaScanned—Ratio, expressed as a percent, of the total surface area (holes and particle) in relation to the image.
  • cwimaqParticleRatioAreaTotal—Ratio of the surface area of the particle to the total surface area (holes and particle).
  • cwimaqParticleRatioEquEllipse—Fraction of the major axis to the minor axis of the equivalent ellipse.
  • cwimaqParticleRatioRect—Ratio of RectBigSide to RectSmallSide.
  • cwimaqParticleRectBigSide—Length of the long side of a rectangle having the same area and perimeter as the particle in user-defined units.
  • cwimaqParticleRectBottom—Bottom edge of the bounding rectangle.
  • cwimaqParticleRectHeight—Height of the bounding rectangle in user-defined units.
  • cwimaqParticleRectLeft—Left edge of the bounding rectangle.
  • cwimaqParticleRectRight—Right edge of the bounding rectangle.
  • cwimaqParticleRectSmallSide—Length of the short side of a rectangle having the same area and perimeter as the particle in user-defined units.
  • cwimaqParticleRectTop—Top edge of the bounding rectangle.
  • cwimaqParticleRectWidth—Width of the bounding rectangle in user-defined units.
  • cwimaqParticleSigmaX—Sum of the particle pixels on the x-axis.
  • cwimaqParticleSigmaXX—Sum of the particle pixels on the x-axis squared.
  • cwimaqParticleSigmaXY—Sum of the particle pixels on the x-axis and y-axis.
  • cwimaqParticleSigmaY—Sum of the particle pixels on the y-axis.
  • cwimaqParticleSigmaYY—Sum of the particle pixels on the y-axis squared.
  • cwimaqParticleTypeFactor—A complex factor relating the surface area to the moment of inertia.
  • cwimaqParticleWaddelDisk—Diameter of the disk having the same area as the particle in user-defined units.

Purpose

Coefficient to select.

Remarks

The following values are valid for this property:

cwimaqParticleArea
cwimaqParticleAreaCalibrated
cwimaqParticleHoleNumber
cwimaqParticleHoleArea
cwimaqParticleRectLeft
cwimaqParticleRectTop
cwimaqParticleRectRight
cwimaqParticleRectBottom
cwimaqParticleMaxSegment
cwimaqParticleMaxSegmentX
cwimaqParticleMaxSegmentY
cwimaqParticlePerimeter
cwimaqParticleHolePerimeter
cwimaqParticleSigmaX
cwimaqParticleSigmaY
cwimaqParticleSigmaXX
cwimaqParticleSigmaYY
cwimaqParticleSigmaXY
cwimaqParticleProjectionX
cwimaqParticleProjectionY