How much knowledge does the machine vision image capture card know?

The image acquisition card is one of the key components of the machine vision system. Its main function is to connect the image acquisition and image processing. It is a hardware device that can acquire digital image information and store or output it.

So how much do you know about the professional knowledge of image capture cards? Today, Microvision will fully answer your questions for you. First of all, from the related terms of the image capture card:

1, A/D conversion

The image acquisition card can realize the conversion of analog signals to digital signals, which plays an important role in image acquisition of the entire machine vision system. The analog-to-digital conversion of the machine vision system image acquisition card is called A/D conversion, and the corresponding component that realizes conversion is called an A/D converter. Corresponding to the term D/A conversion, it is clear that D/A conversion refers to the conversion of digital signals to analog signals.

2, the number of transmission channels

In the process of industrial production inspection, many visual systems need to be operated at the same time to ensure certain efficiency. Therefore, in order to meet the needs of the system operation, under normal circumstances, machine vision system image acquisition card can simultaneously A / D conversion of multiple cameras. The number of transmission channels refers to the number of simultaneous conversions using the same image acquisition card.

3, sampling frequency

Sampling frequency is a main technical indicator of the machine vision system image acquisition card. It refers to the frequency of the image acquisition card in the acquisition of image information, and reflects the speed and ability of the acquisition card to process the image. Especially when high-speed image acquisition is performed, the sampling frequency is an important parameter for deciding what kind of image acquisition card is selected.

4, frames and fields

A video signal can be progressively sampled for a series of frames, or it can be interleaved for a sequence of interlaced fields. In this interlaced sampled video sequence, half of the data for a frame is Sampled at time sampling intervals.

With the rapid development of video technology, there are more and more functions of the image capture card, and the application range is becoming wider and wider. HD capture cards gradually replace the SD card, which has become the trend of the market development. For more product details, please log in, free national consultation hotline.