Three-dimensional Laparoscopic Image Sensing And Detection System And GUI System Design

Compared with traditional laparotomy, endoscopic surgery is a mainstream development of operation in the future, which with many advantages of light surgical trauma, little pain and little recovery time. Endoscopic equipment is the key equipment of endoscopic surgery, which is an extension of the surgeon’s vision, and helps surgeons to perform minimally invasive surgery. However, the existing two-dimensional laparoscopic cannot get as strong as true stereoscopic visual images during surgery like abdominal surgery. Surgeons need to empirically determine the depth state of organs in the abdominal cavity, resulting in more difficulty about laparoscopic surgical procedures, tend to damage vital organs structure during surgery, and significantly higher the incidence of serious complications, etc. Therefore, it is necessary to explore three-dimensional laparoscopic equipment technology to expand the scope of application of laparoscopic surgery.Began in the1990s, people abroad began to explore and study technology of three-dimensional laparoscopic system and strive to improve effect of the three-dimensional imaging and image clarity. Currently, the latest foreign3D laparoscope can reach megapixels or more image resolution, even as720p or1080i HD imaging, when getting3D imaging. Therefore, it is necessary to carry out related research and exploration in the three-dimensional image sensing detection. This thesis studied and implemented a three-dimensional image sensing laparoscopic acquisition and processing display system, it has four parts:Firstly, analyzed the research the development of three-dimensional image sensing laparoscopic detection and image processing systems, and provided a framework design for the three-dimensional high-definition and real-time image processing system based on CMOS image sensors and FPGA platform, and realized the whole system.Secondly, compared the performance characteristics of CMOS image sensors and CCD image capture chip, studied and implemented Dual CMOS image sensor configuration parameters setting and image data acquisition and transmission.Thirdly, Studied and implemented DDR2SDRAM reading and writing time-sharing operations processing method and Bayer format conversion algorithm based on FPGA platform, and dual image data output and display processing, ultimately achieved720p/120Hz three-dimensional high-definition video images display in real time.At last, according to the actual needs of the3D laparoscopic medical devices, designed a graphical user interface with μC/GUI and μC/OS-Ⅱ on the FPGA platform, and achieved the white balance settings, brightness adjustment and other core functions.This thesis realized the three-dimensional720p/120Hz HD real-time video system, and the real video display is clear and stable. This study has laid a good foundation for the domestic development of three-dimensional endoscopic HD image acquisition system.