QM Quiz 5

What is the optical resolution?

• The ability of a system to distinguish between two points

• The number of pixels in an image

• The pixels in all images combined

• The number of voxels

A laser scanner uses what principle for measuring?

• Polygonisation

• Triangulation

• Structured light principle

• 2D scanning principle

The direct result of a scan with a 3D stereoscopic scanner is:

• A mesh

• A 3D model

• A point cloud

• An image

Polygonization is the process through which a point cloud is transformed into a mesh (surface)

• True

• False

A voxel is:

• A pixel

• A type of camera

• A surface

• A volumetric pixel

In a digital camera, the light passes through the lens to the sensor which generates a signal that is digitized and transformed into an image

• True

• False

In a digital camera the analog signal (light) is:

• passed through unprocesed

• digitized

• not used at all

• considered a perturbating factor

A digital image can be defined as:

• a random set of pixels

• a matrix of values in ascending order

• a matrix of pixels

• a value

In a back and white image, a pixel with a value of 255 appears:

• White

• Black

• Green

• Red

Image resolution can be expressed in:

• centimeters

• voxels

• Lux

• Megapixels