RakeOptions

NI Vision for LabWindows/CVI Function

RakeOptions

Describes how to search for the edges.

Elements

Name

Type

Description

threshold int Specifies the threshold value for the contrast of the edge. The function identifies only edges with a contrast greater than this value in the detection process.
width int The number of pixels that the function averages to find the contrast at either side of the edge.
steepness int The span, in pixels, of the slope of the edge projected along the path specified by the input points.
subsamplingRatio int Specifies the number of pixels that separate two consecutive search lines.
subpixelType InterpolationMethod The method for interpolating. Valid options include IMAQ_QUADRATIC and IMAQ_CUBIC_SPLINE.
subpixelDivisions int The number of samples the function obtains from a pixel. For example, set subpixelDivisions to 4 to split each pixel into four subpixels. The maximum number of subpixel divisions is 12.