The Design Of Data Transmission For Portable Laser Speckle Imaging System

Laser Speckle Contrast Imaging (LSCI) is a non-invasive, non-contact technique ofoptical coherent domain imaging. It has the advantage of real-time measuring, wide-fieldimaging, non-scanning and high temporal-spatial resolution. Now it has been widely usedfor imaging the blood flow in retina, cerebral cortex and skin. However, due to the large sizeof the existing laser speckle imaging system, it’s application for clinical use has been limited.Also, the high cost of the system may hinder this technique from popular in clinicalapplications.Due to the draw backs of the existing laser speckle imaging system and the urgent needfor miniaturization and portable of blood flow imaging system, it’s becoming an importantresearch filed to design a portable, hand-held laser speckle imaging system. As datatransmission is the bridge which connects the acquisition end of the image data and thedisplay end of the image, it should be one of the most important part of the whole system.This thesis is the comprehensive and systematic design for the data transmission in laserspeckle imaging system.The main contents are as follows:(1) Designed the image data sender of the transmission system based the FPGA SystemProgrammable On Chip (SOPC). Respectively, for the User Datagram Protocol (UDP) andTransmission Control Protocol (TCP) complete the design of hardware and software of the sender.(2) Designed the image data receiver of the transmission system on the host computer.Completed the image data reception, image data reading, image drawing and image displaybased on both UDP and TCP, two protocol type for data transmission.(3) Tested the image data transmission system. I verified the correctness of the data send bythe image data sender by testing the image data sender. And mapped out the transmission errorrate, packet loss rate curve with the transmission speed increasing. Realized the image datasending, receiving and the image display based on both UDP and TCP. And realized thetransmission control from the image data receiver to the sender based on TCP.