A Design And Implementation Of Embedded Digital Image Transmission System Based On Zynq

With the rapid development of embedded technology and image processing, image transmission based on embedded technology has become one of the major research topic in recent years. In the embedded technology, Zynq extensible processing platform is a kind of newly developed platform technology, it integrates Field-Programmable Gate Array (FPGA), RISC processor(ARM) with low-power high performance and their interconnection bus in a chip, so it has the both advantages of FPGA and ARM. In order to satisfy the demand of the image acquisition, transmission, processing system, such as high integration, non-compression, large amount of data, the paper designs and realizes a kind of embedded digital image transmission system based on Zynq. Compared with the digital image transmission system based on PC and processing board, because the Zynq integrates programmable logic and internal processor system, the system used Zynq has low power consumption, stable performance, small volume, convenient installation and good real-time performance. Compared with the digital image transmission system based on ARM and FPGA, its internal high-speed bus interconnection structure is simplified the system set up, provides the design and implementation of the flexible enough. With the use of the advantages like hardware and software collaborative design technology, internal interconnection bus, high-speed and rich-interface, the image acquisition transmission system put the image data acquisition, transmission and processing as a whole. It meets the current image transmission system function and performance requirements.Paper designs and implements a digital image transmission system on the Zynq platform. According to external commands, the system can capture image data via digital camera which has a USB interface, implement local data storage and high-speed processing, and transfer the data to the remote terminal via Gigabit Ethernet. Reasonable division of hardware and software simplifies system design complexity. The design of interface bus reduces system resource consumption, increasing the speed of data exchange between hardware and software. The use of USB camera not only provides a stable and reliable data source, but also conducive to maintenance of the system, increasing the versatility of the system. The improved median filter algorithm implemented in the programmable logic improve the image quality, at the same time improve the image processing speed, reduce the efficiency of the system processor, and provided a well condition of image data further processing and use for the remote terminal. Gigabit Ethernet technology effectively improve the data transmission bandwidth, achieve long-distance high-speed transfer of image data to meet the development needs of the digital image transmission system. The system which has VGA/HDMI display module and control software, has a good interactive interface, and the ability to respond to commands from external keyboard and mouse.The paper has a long time of validation test on the embedded digital image transmission system based on Zynq, experimental data show that system is better able to complete the acquisition, processing and transmission of image data. After testing, the image processing module can effectively improve the image quality, reducing the noise caused during image acquisition. It can send data at a rate of 450Mbps, basically meet the design requirements, and also lays a solid foundation for later image correlation processing. The system has a better research and practical application value.