What can be scanned?

As structured light scanners rely on the reflection of light to capture data, the properties of the object being scanned will have a drastic impact on the success of a scan.

These properties impact both;

• the ability of a scanner to capture data

• the ability of an algorithm or individual to align the scan data.

Objects that scan well using SLS

• Objects that are; matte, opaque and light in colour will have the best scan outcome as these surfaces reflect light with little distortion.

• Objects with asymmetrical features & complex surface textures as scan frames are more easily distinguished from one another - aiding with tracking whilst scanning & alignment during post processing

Objects that do not scan well using SLS

• Objects with deep undercuts, dark surfaces & shadows will not scan well - if at all, as light may not reach or reflect from these areas.

• Transparent & translucent objects can be difficult to scan as light may scatter or the object may reflect too much light.

• symmetrical features & smooth uninterrupted faces can be challenging to scan and align as triangulation is difficult

Overcoming Issues

Many issues can be overcome by modifying the scanning set up. Here are some of the most common issues and how you can modify your set up or scanning technique to still capture suitable scan data.

Symmetrical Objects with limited surface details	Difficult to align once scanned	Apply registration marks to assist with alignment. Scan on a high textured background.
Thin Objects keys, knives,	Difficult to detect object / differentiate from background	Apply registration marks Scan on a contrasting background Scan at multiple dynamic angles
Dark Objects black materials, dark surface features	Partially absorb structured light patterns resulting in an incomplete reflection	Apply 3D Scanning Spray to surface of the object
Reflective Objects metal, ceramics, shiny plastic, polished surfaces,	Scatter and reflect too much light	Apply 3D Scanning Spray to surface of the object Scan at multiple angles Scan on a coloured background Turn off any external lighting (ambient or accent lighting)
Translucent Objects candle wax, FDM 3D Prints & thin plastics	Diffuse light resulting in a softened or blurred reflection	Apply 3D Scanning Spray to surface of the object Scan on a coloured background
Transparent glass, clear resins,	Allow light to pass through the object resulting in limited/no reflections	Apply 3D Scanning Spray to surface of the object Scan on a coloured background
Human Body arms, legs, face, etc.	Misalignment due to small movements & complex non-solid structures (hair)	Complete 1 continuous scan to limit movement For hair, lightly dampen, or apply hairspray /dry shampoo to keep in place
Shallow undercuts	Diffuse and scatter light resulting in a softened features and incomplete surfaces	Scan at multiple dynamic angles
Non-Solid Structures fur, faux leather, fabric, flexible objects,	Difficult for scanning software to calculate the objects precise shape.	Avoid contact with object being scanned to limit deformation / compression of material Scan at multiple dynamic angles. Flexible objects - suspend object and complete multiple scans
Deep Undercuts	Difficult for light to reach depths & reflect accurately	Not Recommended If suitable, object can be split into sections. Alternative scanning technology may be required
Moving, Vibrating or Flexible objects	Misalignment due to small movements or object deformation with time or adjustment	Not Recommended Flexible objects - suspend object and complete multiple scans Alternative scanning technology may be required