Two types are used in image processing: Area cameras and line scan cameras.
Line scan cameras are based on the line-by-line structure of an image. In inspection tasks, for example, either the line sensor moves linearly over an object, or the object is moved linearly under the sensor.
The area scan camera captures the object with an image (photography). Area scan cameras are available in different resolutions, frame rates and interfaces. There is a choice between a monochrome or a color sensor. Infrared and UV-sensitive sensors are also available.
Depending on the task of image processing, the factors pixel size, noise behaviour or trigger modes are of interest.
When selecting the appropriate interface, the size of the bandwidth must be taken into account. Several standards have established themselves for connecting to the computer. There are:
GigE (up to 100 m cable length and 100 MB/s data rate)
USB 3 (up to 5 m cable length and 350 MB/s data rate)
CameraLink / CameraLink HS USB 3.0 or USB 3.1 (both technically the same) is the latest interface in the image processing sector. The bandwidth between CameraLink and GigE as well as the plug-and-play functionality are a decisive advantage. USB 3.0 meets all industrial requirements. In addition, this interface is matched to the latest CMOS sensors and can fully exploit all the advantages of the new technology.