You can do measurements and inspections to a 3D model that you can’t do to a normal 2D image. For example quality control on the shape, measuring volume and slicing the object into exactly same size slices. You can only do this with an camera which creates 3D-images.
Satakunta University of Applied Sciences has a 3D linescan camera. When taking images with a linescan camera, you need to move the camera or the object. This type of an camera fits perfectly for applications which include a conveyor belt.