# ExtractSphere3D Vision Data Access functions

This section lists the available 3D Vision Data Access functions that get values from a Spheres3D structure.

Note: Each of the following functions references the results contained in the Spheres3D structure for the first parameter. Index (zero-based) determines which result 3D sphere of the Spheres3D structure you want to reference. If you do not specify the index, the index defaults to zero, meaning the function returns the first sphere.

Function | Description
GetNFound(Spheres3D) | Returns the number of found spheres.
GetNumInliers(Spheres3D, index) | Returns the number of inliers for the specified 3D sphere.
GetResidualsMax(Spheres3D, [Index]) | Returns the maximum residual for the specified 3D sphere.
GetResidualsRMS(Spheres3D, [Index]) | Returns the root mean square residual for the specified 3D sphere.
GetScore(Spheres3D, [Index]) | Returns the score of the extracted Sphere3D structure specified with the index number. The value is a number between 0 – 100.
GetSphere(Spheres3D, [Index]) | Returns the extracted Sphere3D structure with the specified index number.