Research On Image Acquisition And Processing System Based On USB3.0 And FPGA

Image information has intuitive and specific features,and its applications are more and more widely.At the same time,the quality and efficiency of image collection is needed to be a higher level,which requires image acquisition and processing system to solve some practical problems to meet these needs.Nowadays,image acquisition is moving toward high resolution and high frame rate,which leads to the problem of image data transmission efficiency and stability.And with the increasing complexity of image processing,image processing is lacking in real-time feature.This research is mainly aimed at these two aspects.High resolution and high frame rate mean that high bandwidth is required.In order to obtain high-speed transmission rate,this research chooses the hardware architecture based on USB3.0 and FPGA.Through a deep analysis of the data transmission scheme,an appropriate data transmission type and a transmission interface are selected,which can maximize the USB3.0 data throughput in order to improve the efficiency of data transmission.A frame check mode is used to achieve image data frame synchronization,which creates a fault-tolerance correction mechanism in system.A data cache module is added to avoid data loss,thereby enhancing the stability of data transmission.In the aspect of real-time processing,the image preprocessing function is added in the process of image acquisition.The implementation of image convolution operation and statistical sorting operation based on FPGA is discussed.And two related examples,sobel and medium filter,are taken to describe the implementation of hardware acceleration,which can reduce the back-end image software processing pressure,thereby reducing the total image processing time in some image applications.With schemes above,the experimental results show that the system can achieve an image capture of 2592×1944@14 frame/s with stability,data transmission bandwidth can reach 320 MB / s,and the image preprocessing function is working normally.