Scan surveys were undertaken on a 42’ hull to capture details along the hull tool, keel stub and rudder skeg. The scans were taken inside one of the Discovery Shipyard facilities providing low lighting conducive to the attainment of accurate and low noise scan data. Overhead roof geometry provided good registration references alongside the position checkerboard targets. 

The accuracy of the 3D scanner is highlighted by the deviation scores, in this case with a maximum deviation of 0.8mm and average of 0.6mm, across all 7 scans. 

This allowed a mesh surface to be developed from the scan data, through a series of exports of progressively reducing cell sizes until deterioration of the mesh quality. The alignment of the mesh was also completed using the scans with reference points taken over points of the model. 

Deviation analysis was undertaken to quantify the differences between the original design surfaces and the manually oriented scan surfaces. This is summarised below.