Research On Key Technologies Of Medical Hard Endoscope

With the vigorous development of the medical industry,endoscopes have been widely used in clinical operations and have become one of the important means for the diagnosis and treatment of many diseases.Hard endoscopes have the advantages of clear images,vivid colors,and the ability to select multiple viewing angles and other outstanding advantages.There are two key technologies that are mainly studied,one is the research on DSP-based algorithmic processing architecture,and the other is the research on video image algorithms.Therefore,they have received extensive attention and have broad development prospects.In this article,the internal and external development status of hard endoscopic countries were analyzed and the market's demand for rigid endoscope functions was fully investigated.A kind of endoscope with a variety of image processing functions was designed in this article.It collects images with three COMS chips and uses the TL8168-Easy EVM processor as its core.In order to develop this medical hard endoscope,the following work was conducted in this article.1.A rigid endoscope system's image acquisition and processing scheme was proposed.The endoscope system consists of an image acquisition system and an image processing system.In the image acquisition system,three-color dichroic prisms was used to separate the light and the 3COMS chip used to collects the signals.In the image processing system,the TL8168-EasyEVM was used as the processing core,which is regulated by ARM and DSP performs image algorithm processing.2.The hardware structure of TL8168-EasyVM processor was analyzed,the internal structure and functions of the ARM subsystem and DSP subsystem are introduced and the internal communication mechanism of DSP and ARM is elaborated.Then,the hard endoscope's optical system was introduced,The endoscope rod mirror structure was analyzed in detail,the specific process of image signal which passed through the rod mirror system,the dichroic prism and COMS was elaborated.3.The rigid endoscope system was set up.A cross-compilation tool and an EZSDK development environment were installed on the Linux system,and the Codec Engine was configured to complete the communication between the ARM and the DSP.The single image was processed and good results were obtained.Then,the parameters of COMS were configured,and the specific ranges of different parameters and the different performance of each parameter were analyzed in detail.4.Video image algorithm was studied.A PC with a high-speed image acquisition structure was used,an endoscopic image processing platform was set up to research on the key technologies of endoscopic image processing.The principle of each image processing algorithm is analyzed in detail.One-on-one verification is performed on the PC platform,and the difference between the images before and after the comparison process is analyzed.The advantages and disadvantages of the image processing algorithm are analyzed,and optimization processing is performed.It lays the foundation for DSP processing platform algorithm transplantation.5.DSP algorithm processing system is studied and applied.The key Technologies of DSP Processing Based on DSP was researched.The image processing algorithm is written in C language,and simulation optimization is performed on CCS.The optimized algorithm is transplanted to the DSP and called by the ARM to perform real-time processing on the collected video images.Although the system has completed processing and display,it needs further optimization for speed.