Enabling application-appropriate image transmission using the right interface is a critical factor in machine vision. The interface influences the transmission speed and quality and must be thought of in the context of performance, user-friendliness, availability and cost factors. For each specific task, individual interfaces offer different possibilities to realize an optimal solution. For example, adapting the interface to bridge longer transmission distances or to ensure higher bandwidths.
Modification of interfaces is a typical application when using the versatile zoom block cameras. These come standard with LVDS or HDMI interfaces, but depending on the industry and application, another interface may be necessary or more appropriate. With our expertise in zoom block cameras and all interfaces, we regularly advise our customers on this use case and find the best possible solution for individual requirements.
Frequently used interfaces in zoom block cameras
Particularly suitable for observation applications in mechanical engineering, as the camera can be connected directly to a monitor with HDMI connection. However, cables for longer lengths (between camera and monitor) become very complex and expensive.
SDI applications are typical for the medical sector. They allow fast transmissions at cable lengths of up to 100 m over a single coaxial cable. In addition, SDI has low latency when converting from LVDS or HDMI.
Cameras with an IP interface are widely used, especially in security technology. Images are transmitted in compressed form via Ethernet and the camera is also controlled via the same network (usually ONVIF protocol). The big advantage is that IP can be easily integrated into the existing infrastructure of buildings and enables uncomplicated operation of the camera. The disadvantage is high latency and reduced resolution.
Is used in various fields and is very common. The big advantage is that power, communication and image transmission can run over a USB cable. Data can be displayed directly on the computer without complications. The disadvantage is that cable lengths for USB 3 are limited to < 10 m or otherwise very cost-intensive.
GigE is the standard in machine vision for C-mount cameras. In some cases, however, GigE is also used in zoom blocks. The transmission of high-resolution images via Ethernet is a clear strength of the GigE interface, but high bandwidths are required because uncompressed images are transmitted.
We work closely with our customers to define a suitable data interface for each application and integrate appropriate converters into the customized camera system. Here we economically weigh the effort between required hardware, data quality and development. We are happy to advise you on the appropriate interface and corresponding modifications.
Parameters that must be considered when choosing the appropriate interface:
Bandwidth
Transmission distance
Latency
Trigger accuracy
Hardware support
Image format
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As experts in customized image processing solutions, we love challenges and smart solutions. We would be happy to advise you on the individualization of assemblies and modules. We look forward to hearing from you.
Dr. Stefan Mühlig
Kameras, Beleuchtungen, Kabel
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