Many people know that the image capture card is an important part of the auto focus camera, but they are not very clear, what role does the image capture card of the autofocus camera play? Today, Shenzhen Xuan Exhibition technology will discuss the role of image capture card with you.
A typical auto focus camera consists of the following five parts: lighting, lens, high-speed camera, image capture card, vision processor. The image capture card is only one component of the complete camera, but it plays a very important role.
HDMI video acquisition card
Image capture card, also known as video capture card, can be used to obtain digital video information, and store and play it out. Many video capture cards can capture video information and obtain sound at the same time, so that the audio part and the video part are saved and played simultaneously when digitized.
The interface from video signal source and image acquisition card can be divided into analog acquisition card and digital acquisition card. The analog acquisition card collects the analog video signal to the PC through AV or S terminal, so that the analog signal is converted into a digital signal, and the video signal source can be from the analog camera, TV signal, analog video recorder, etc.
Digital acquisition card in the form of digital to digital, the digital video signal lossless acquisition to the PC, the video signal source is mainly from DV (digital camera) and some other digital equipment.
An important difference between analog acquisition card and digital acquisition card is that: the use of digital acquisition card, there is no loss of video signal in the acquisition process, which can guarantee the same effect as the original video source, while the use of analog acquisition card will have a certain degree of loss of video signal.
We can make an example: analog acquisition is similar to using the VCRS to turn over the video, the subtape is always not as clear as the master tape, if the subtape is reused, the effect will be worse; Digital acquisition is like copying data files with a computer, no matter how many times it is copied, the copied file is exactly the same as the original file, without any difference. Two-in-one acquisition card refers to digital analog acquisition card, AV+DV acquisition card. Digital input/output, analog interface input (DV/AV/S-video), full interface board.
If the auto focus camera is the eyes and brain of the machine vision system, then the image capture card is the heart of the machine vision system. It accurately accepts various specifications of video data from the front-end camera, receives external trigger pulses, and starts the camera’s exposure and scanning, playing an important role in the system.