A Simplified View of a Typical Setup
A line-scan camera transforms the light intensity along a line into a time varying video signal.
A line-scan based system usually observes a continuous material or set of objects exhibiting a regular shifting movement. We will refer to this material as the "inspected web".
Conceptually, the system reconstructs a 2D representation of the moving scene from a 1D analysis.
Two directional references are introduced:
- the downweb direction: the motion direction of the inspected web. It may be also named the axial direction.
- the crossweb direction: the axis of the observed line. It may be also called the transverse direction.
Those directions are perpendicular to each other.