The acquisition and processing of image signal are used widely in the fields of scientific research, industrial and agricultural production, medicine and sanitation,public security and so on. And these works can’t be completed without a set of high-speed image acquisition system. Meanwhile image acquisition is the basis of image processing, compressing and recognizing, so the research on image acquisition system is very important and valuable. In order to acquire image, a kind of high-speed computer interface supporting long time and high throughput data transferring is needed.USB 2.0 interface is a computer interface that meets the need of image acquisition. Inaddition, USB interface has the advantages of high transfer-rate, hot plug and play, less resource requirement, being easily extended and used. At present, many peripheral devices of computer use USB interface to accomplish data communication with computers.
The research of “Image Acquisition System Based on USB Interface” is to design a high-speed image acquisition card acquiring and processing image data, and then transferring the data to computer by USB2.0 interface, to display and store the data on computer.
Keywords：acquisition of image USB interface video frequency
