Image processing system
The integration of a machine vision system (BVS) in the manufacturing or production environment is usually a one-off project. This requires a precise task description.
The basic structure of an image processing system consists of the following parts:
– Lighting (mostly LED lighting)
– Digital camera(s)(CMOS, CCD, thermography)
– Objectives(entocentric, telecentric, microscope, telescope)
– Video card, frame grabber
– Computing unit, PC
– Image processing, software, image analysis
– Interfaces (to a higher-level system, controller or PLC or to other systems) for results control
The lighting unit provides the right light to deliver the optimum contrast for the test task. The camera captures a grayscale image (preferably without image errors). The image captured by the camera is evaluated by image processing (image analysis).
The time required, as simple as this may sound, has an effect on the production flow in a production line. It may be necessary to plan for larger buffers and a stopper in front of the camera.
Components and influencing variables of a vision system (source: Vision Doctor)
