3D Scanning - Tech talk

by Jo Kamm

Active Systems for 3D Scanning:

• Laser Line

• Structured Light

• Time of Flight

• LIDAR

Passive Systems:

• Photogrammetry

Laser Scanning

• camera reads distortion of one or more laser lines to sense depth

Laser Scanning:

Pros:

• Accurate

Cons:

• Slow

• must be close to subject

Structured Light

• Camera reads distortion in a projected pattern to sense depth

Time of Flight

• Uses the speed of light to calculate distance based on nanoseconds of difference among projected and received light

Time of Flight

Pros:

• more accurate continuous scanning than structured light

Cons:

• Few options available in hardware/software

Other scanning methods:

Pros:

• Versatility - So many possibilities!!

Cons:

• $$$