What Is a Line Scan Camera and How Does It Work?
239Imaging principleHow does a line scan camera capture an "area scan" image? What is a line scan camera? Line scan camera: the image taken&nbs...
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In today’s era of technology, the demand for automation and intelligent technology is increasing across various industries. Machine vision technology can use industrial cameras to replace the human eye for image acquisition and image processing, achieving intelligent imaging technology for measurement, inspection, and other work projects. Naturally, it has a very broad range of applications and development prospects in our country.
A machine vision system consists of light sources, lenses, cameras, image acquisition cards, and image processing software. Among them, the industrial camera, as the core component of the image acquisition part of the machine vision system, is the most concerned by users. According to the different signal transmission interfaces, industrial cameras are mainly divided into IEEE 1394, GigE, Camera Link, USB, and CoaXPress.
These five different interface standards each have their own characteristics. Today, the focus is on introducing GigE Vision. It is created and promoted by the AIA (Automated Imaging Association). GigE Vision is a camera interface standard developed based on the Gigabit Ethernet communication protocol, suitable for industrial imaging applications, and capable of transmitting uncompressed video signals over a network.
GigE (Gigabit Ethernet) is characterized by high efficiency, high speed, and high performance. It is currently the fastest developing interface among industrial digital cameras and is also a universally applicable digital interface that can almost completely replace the camera interface of analog devices. It is now widely used in industries such as machine vision, education, government agencies, and industrial and mining enterprises.
However, the GigE Vision interface also has some shortcomings. For example, the transmission of large amounts of image data can make the CPU overworked, which may lead to packet loss and latency.
Of course, for this issue, researchers have also found corresponding solutions. Here are two reference methods: The first is to use an image acquisition card with a built-in CPU (ARM) and FPGA, and transfer the image to the PC system in real-time through DMA (Direct Memory Access). This operation does not occupy the processor resources of the PC and ensures that there is no image or data loss during the image acquisition process.
The second is to choose jumbo frame settings, increase interrupt throttling rates, increase the value of receive descriptors, offload protocol operations, and image reassembly, etc. GigE industrial cameras can unify almost all industrial camera protocols in machine vision products, while also allowing other organizations to develop other compatible software and hardware based on it. Currently, many products can support the GigE Vision standard.
As a leading domestic industrial cameras company, Do3think Technology has always focused on the innovation and design development of machine vision products and is a global supplier of core components for machine vision, providing stable, reliable, simple, and easy-to-use core products for precision intelligent manufacturing in the global industry.
The MGS series of industrial area scan cameras and the GLP series of industrial line scan cameras, independently developed and designed by Do3think, are developed based on the GigE Vision interface standard. In addition to being compatible with third-party machine vision development software, they can also easily integrate the camera into the customer’s system. They are particularly suitable for application scenarios that have strict requirements for stability, compatibility, and cost-effectiveness.
Imaging principleHow does a line scan camera capture an "area scan" image? What is a line scan camera? Line scan camera: the image taken&nbs...
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