Design And Implementation Of Portable Electronic Endoscope Image Processor With General Interface For Otolaryngology

Electronic endoscope system is an important equipment for minimally invasive medicine,and its image processor design is the core key technology and a research hotspot.With the development of integrated circuits and embedded software systems,image processors are developing toward more general purpose,higher data throughput,and more portability Taking the otolaryngology department’s demand for an electronic endoscope system as an example,a variety of endoscopes need to be easily accessed during an emergency,and the system needs to be light and easy to carry when going out.Therefore,a portable image processor that can simultaneously access multiple electronic endoscopes such as a nasopharyngoscope,anesthesia laryngoscope,etc.has become a design focus.This article analyzes the existing product performance characteristics and future development trends,and proposes a design scheme for a portable ENT image processor with universal interface,which overcomes the bulkiness,inflexibility,and poor scalability of conventional endoscope systems.The disadvantages have important research significance and application value.This thesis adopts the ARM architecture embedded platform made by the advanced 28nm HKMG low-power process and the new version of Linux 3.4.39 kernel to plan the above clinical medical needs.The selected platform has the characteristics of small size,low power consumption,and strong video processing capability,and is suitable for implementing a portable medical electronic endoscope image processor.In terms of general video input interface design,this paper has developed a high-efficiency video streaming software architecture and driver software for mainstream DVP,MIPI,USB interface image sensors,and designed a dedicated video streaming framework to achieve high-speed and low-latency video processing.The scheme of multi-hardware sharing video buffer is designed,and the software design of multiple video output interfaces is realized.In summary,the thesis realizes the access to various image sensors of high-definition 720p,2 million pixels and 5 million pixels,as well as real-time video display,freezing,taking pictures,recording,playback,photo browsing,file management and other functions,with touch screen control for human-computer interaction.The dual-screen display function implemented by this system is also in line with the current mainstream electronic endoscope image processor usage.Finally,on the basis of meeting the design goals of the system’s universal input interface and real-time image processing,the relationship between the loss of image resolution and the encoding bit rate,as well as the encoding frame rate,is further explored in terms of system delay,image compression quality,and image decoding restoration.It has been optimized in aspects such as degree,and other important parameters for evaluating the endoscope system have been quantitatively tested and analyzed.This paper aims at the clinical medical needs of the portable ENT electronic image processor image processor,developed an open source driver model based on an embedded processor,and further optimized image compression.It has laid a good foundation for further development in the future driver framework,system software and image quality Analysis and other related research work.