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Grabbing The Frame | Matrox Imaging and Cognex

  • By Jason Stockwell

Almost written-off by the introduction of new technology, the venerable frame grabber is alive and well. Here we look at some of the major players.

Matrox Imaging

The Matrox Rapixo CXP is a new generation of frame grabbers from Matrox Imaging.

The frame grabbers support version 2.0 of the CoaXPress (CXP) digital interface standard for machine vision applications. The Rapixo CXP series supports data rates of either up to 6.25 Gbps (CXP-6) or up to 12.5 Gbps (CXP-12). A PCIe 3.1 x8 host interfaces comfortably matches the maximum input bandwidth from the CXP links. The CXP links are accessed through high-density BNC connectors allowing for a homogenous interconnection with new cameras. Power-over-CoaXPress (PoCXP) support on each connection implifies system configurations, combining the camera’s power interface with its command- and data-interface onto the same coaxial cable.

The Matrox Rapixo CXP features four connections for interfacing to independent cameras as well as for handling higher data rates through connection aggregation. The Rapixo CXP series possess sufficient onboard memory to buffer incoming image data in situations where the host computer is temporarily unable to accept data. The fanless design for select models ensures extended use without maintenance.

The Matrox Rapixo CXP makes use of a field-programmable gate array (FPGA) device from the Xilinx Kintex UltraScale family for not only integrating the controlling, formatting, and streaming logic of the various interfaces, but also allowing developers to incorporate Matrox Imaging- or user-developed custom image pre-processing operations to offload from the host computer.


The Cognex 8704e GigE frame grabber is a 4-port GigE card available for use with Cognex and third-party cameras. It is the recommended GigE interface card for all new vision software applications for organizations building their own industrial PCs for machine vision.

  • Interface 1 to 4 Cognex Industrial Cameras or third-party GigE vision cameras to your PC for single- or multi-camera vision development
  • 4 independent channels with Power Over Ethernet (PoE) allow for simultaneous image acquisition
  • PCI Express compliant
  • Jumbo frames
  • Integrated license security
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