Set a threshold of distance from a cylinder. When the distance of a 3D point from the curved surface of a found cylinder is smaller than this value, the tool judges that the 3D point is on the curved surface of the found cylinder. By setting a large value to the parameter, it is easy to succeed a finding but degraded accuracy result might be output. The units are mm. Enter a number between 0.1 and 1000 in the text box.