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: