# ExtractCylinder3D Vision Data Access functions

This section lists the available 3D Vision Data Access functions that get values from a Cylinders3D function.

Note: Each of the following functions references the results contained in a Cylinders3D structure for the first parameter. Index (zero-based) determines which result 3D cylinder of the Cylinders3D structure you want to reference. If you do not specify the index, the index defaults to zero, meaning the function returns the first cylinder.

Function | Description
GetCylinder(Cylinders3D, [Index]) | Returns the extracted Cylinder3D structure with the specified index.
GetNFound(Cylinders3D) | Returns the number of found 3D cylinders.
GetNumInliers(Cylinders3D, [Index]) | Returns the number of inliers in the specified Cylinder3D structure.
GetResidualsMax(Cylinders3D, [Index]) | Returns the maximum residual in the specified Cylinder3D structure.
GetResidualsRMS(Cylinders3D, [Index]) | Returns the root mean square residual of the specified Cylinder3D structure.
GetScore(Cylinders3D, [Index]) | Returns the score of the extracted Cylinder3D structure between 0 – 100.