Functions and Features of a Vision System

The major functions of a vision system are:

• Identification
• Determination of position & angular orientation in relation to reference coordinates
• Positioning, fitting, and sorting
• Setup or adjustment of tools
• Measurements of distances, and angles
• Extraction & identification of specific parameters
• Visual testing for errors & completeness

Most of vision system has three features that facilitate the integration along a robot programming system:

• Parts to be recognized are explained by user-defined symbolic names that are represented by ASCII strings.
• Position & orientation of the workpiece are found out relative to a Cartesian coordinate system.
• Parts to be recognized are taught to the system by "showing". The symbolic name is also entered.

Some of the models of vision system include following:

• Linear vision system to measure distance.
• Camera system to identify workpieces, their locations, and their orientation.
• Elementary Photoelectric vision system
• Picture recognition sensors
• Self-Scanning Photo arrays