基于FPGA监听的图像采集与预处理方法

针对民用相机原有USB2.0接口技术存在传输速度慢的问题，提出基于现场可编程门阵列（FPGA）监听与USB3.0传输的图像预处理方法.在不破坏相机结构的前提下，利用FPGA强大的并行计算能力，通过外挂监听的方式对图像数据进行实时采集与预处理操作，预处理结果可以通过USB3.0接口与上位机进行快速传输通信，在大幅节约图像传输时间的同时，将部分预处理工作前置于硬件中完成，达到快速获取预处理归一化图像目的.详细介绍系统的设计思路和结构，分别在软件和硬件层面上进行测试和实验数据验证.结果表明，系统具有接口友好、性能稳定、集成度高、使用灵活和实用性强等特点.

Image acquisition and preprocessing method based on FPGA monitor

An image preprocessing method based on field-programmable gate array (FPGA) monitoring and USB3.0 transmission was presented to improve the transmission speed of the original USB2.0 interface technology of the camera in order to promote the industrial application of civil camera. The powerful parallel computing ability of FPGA was used under the condition of preserving the structure of the comera. The real-time acquisition and preprocessing of image data could be conducted through the external monitor. Then the pretreatment results could be fast communicated with host computer by USB3.0 interface, which could greatly save the image transmission time. At the same time, a part of preprocessing work was finished in hardware. The goal of obtaining the normalized image fast was achieved. The design idea and structure of the system were introduced in detail. The examination and experimental data were respectively verified by the software and the hardware. The experimental results indicate that the system has the characteristics of friendly interface, stable performance, high integration, flexible use and strong practicability.