Realization Of Video Acquisition And Image Processing Algorithm Based On

Digital image processing technology has more and more used in daily life,industry,space exploration and many other aspects. Due to the real-time requirements for image processing is higher and higher, traditional processing tools have been more and more can’t meet their requirements. And the Field—Programmable Gate Array FPGA as a kind of electronic tools has rapid development in recent years。 Because of its high speed parallel processing features, it can quickly to deal with a large amount of data, so it has been more and more applications in the field of image processing and communication field.It has high-speed parallel processing characteristics, highly flexible of configurable resources and characteristics of portability, very suitable for use in the field of digital image processing.This paper describes the development of the background video image processing, and FPGA features and future direction of development.On the basis of a large number of reference literatures at home and abroad, video image processing system has be designed. The system realizes the real-time monitoring of video images,and for the common image processing algorithms, combined with FPGA features, completes FPGA-based image processing algorithms.The whole system is divided into specific:video capture module, I2C control module, color restoration module, SDRAM control module, VGA display module and an image processing module. First, when the system is powered on, with I2C control module send camera parameters, Image data is passed through the video capture module into FPGA. After recovery module of the Bayer pattern color RGB format into a conventional RGB format stored in SDRAM.. VGA display module through horizontal and vertical timing synchronization gets image data from SDRAM, after D/A conversion sends to VGA display. In the image processing module first of all, research translucent algorithm, and through image and video capture images be integration on FPGA implementation algorithms translucent.Next, the video image graying, select the fast median filter for filtering gray video screen.In the research of image segmentation, using Sobel edge eight gradient template detection of image segmentation, the results are satisfactory. Finally in morphological filters, using open operation filtering processing the video image, lets the entire picture becomes more delicate.Through the design of this system shows that, by using high speed parallel processing characteristic of FPGA, it can be very good for video image acquisition, and it can complete the commonly image processing algorithms,so put the FPGA in the field of image processing is a very suitable scheme.