# Edges Vision Data Access functions

Functions that get values from an Edges structure.

Note: Each of the following functions references a Edge data structure as the first parameter.

Function | Description
GetAngle(Edges, [Index]) | Returns the angle of the indexed edge.
GetContrast(Edges) | Returns the average contrast between the foreground and background found in grey levels, between 0 to 255. Contrast is positive for black-to-white transitions, and negative for white-to-black transitions. The Edge structure must be created by a FindCircleMinMax function.
GetEdgeDistance(Edges, [Index]) | Returns the distance between two edges (edge pair). The Edge structure must be created by a Caliper function.
GetMax(Edges) | Returns the radius of the maximum deviation from the best edge. The Edge structure must be created by a FindCircleMinMax function.
GetMin(Edges) | Returns the radius of the minimum deviation from the best edge. The Edge structure must be created by a FindCircleMinMax function.
GetNFound(Edges) | Returns the number of edges found.
GetPosition(Edges, [Index]) | Returns the region X position in pixels of the edge or the edge pair center.
GetRadius(Edges, [Index]) | Returns the radius of a specified circle or arc.
GetScore(Edges, [Index1], [Index2]) | Returns the Score value between 0-100 from the indexed edge. Score is positive for black-to-white transitions and negative for white-to-black transitions, except for FindSegment and FindCircleMinMax, where Score is always positive.
GetSDev(Edges) | Returns the standard deviation value. The Edge structure must be created by a FindCircleMinMax function. Note: This calculation is a biased standard deviation, where the denominator is N-1. An unbiased standard deviation has a denominator of N.
GetX(Edges, [Index1], [Index2]) | Returns a X-coordinate. Index1 selects the edge number, and Index2 specifies an end point. 0 is the top-most point, 1 is the bottom-most point.
GetY(Edges, [Index1], [Index2]) | Returns a Y-coordinate. Index1 selects the edge number, and Index2 specifies an end point. 0 is the left-most point, 1 is the right-most point.