An image capture card (ImageCaptureCard), also known as an image capture card, is a hardware device that can acquire digital video image information and store and play it. Many image acquisition cards can acquire audio at the same time as capturing video information, so that the audio portion and the video portion are simultaneously saved and synchronized during digitization.
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Classification of image acquisition cards
According to the way of storing and processing video, it can be divided into analog video and digital video. In the aspect of high-definition video capture and recording, the image acquisition card is a high-end product that has developed rapidly in the digital information industry and has increased the requirements for VGA signal acquisition in many fields. Nowadays, it is widely used in both machine vision system application and teaching in the industrial industry. It integrates many computer hardware and software technologies, and is involved in many fields such as image processing and artificial intelligence.
In actual use, the average transmission rate of the PCI interface is 50 to 90 MB/s, which may not meet the requirements of high transmission rate at the moment of transmission. In order to avoid data loss when conflicts with other PCI devices, there should be a data cache on the image capture card. In general, 2MB of onboard memory can meet most of the mission requirements.
Industrial application of image acquisition card
Input/output control is important in systems such as industrial inspection, traffic, medical, military, and scientific research. In the system, it is often necessary to determine the shooting time of the camera according to the needs of the processing. If a resettable camera is used, a reset signal needs to be generated. In some systems, there should be a pixel clock generator due to the need to set the frame rate of the shot. External synchronization means that the same synchronization signal is used between different video devices to ensure the synchronization of the video signal. It can ensure that the video signals output by different devices have the same frame start and end time. In order to achieve external synchronization, a composite sync signal or a composite video signal needs to be input to the camera. If the frame grabber already has digital I/O capabilities, it can be used to generate gating, triggering, and other electronic signals required by cameras and other electronic devices, which is useful for systems that would otherwise require a separate digital I/O card.
â—Education courseware recording, multimedia recording and video recording, conference recording, video conference, distance education training
â— Large screen splicing, video wall industry, virtual studio, virtual reality, industrial control, game consoles, etc.
â— Security X-ray machine, radar image signal, VDR recorder, medical X-ray machine, CT machine, gastrointestinal machine, colposcope, etc.
â— VGA camera, VGA camera and other VGA signals, RGB signal output device image acquisition and processing
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