System On Chip (SOC) Design and Its Application in Image Matching Based on Field-Programmable Gate Array (FPGA) Technology and Photoelectric Wireless Sensor Network

摘要

The low-power optical wireless sensor network achieves high-speed and stable data transmission under different network modes and hence plays important roles in different industries. Since the microprocessors of ZigBee chip cannot meet the diversified demands, SOC needs to be designed according to the requirements, and constitute the SOC system with the optical wireless sensor network to meet the needs of users. Based on the SOC design process of FPGA, the SOC node is designed with photo-electronic materials, and the MAC sending and receiving function module is designed. Among them, the sending module includes the frame head, the sending data module, the sending state collection module and the frame checking module. The receiving module includes frame header detection module, frame sequence decoding module, address judgment module, receiving data module and frame verification module. The designed SOC chip is applied in the field of image matching. The SIFT algorithm is taken as the research object and the FPGA array of the chip is used as the PL. The CC1020 processor and SOC integrated circuit to constitute PS, management and resource scheduling are conducted with the Linux operating system. In the experiment process of image matching, SIFT integrated circuit is designed based on SOC. The feature points of image are extracted and different types of images are matched and analyzed. It was found that compared with the original image, when the image is compressed into gray image and rotated image, the matching feature number will be reduced; meanwhile, compared with other hardware SIFT circuits, the designed SOC can significantly reduce the time required for image matching which is highly suitable and in align with the market demand.