EdgeOptions

NI Vision for LabWindows/CVI Function

EdgeOptions

Describes how you want the function to find edges.

Elements

Name

Type

Description

threshold unsigned 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 unsigned The number of pixels that the function averages to find the contrast at either side of the edge.
steepness unsigned The span, in pixels, of the slope of the edge projected along the path specified by the input points.
subpixelType InterpolationMethod The method for interpolating. Valid options include IMAQ_QUADRATIC and IMAQ_CUBIC_SPLINE.
subpixelDivisions unsigned 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.