Development Of A Handheld Video Laryngoscope Based On An Embedded System

The emergence of electronic endoscope, it provides greater convenience for health care workers. It can reduce the risk of intubation for patients. Currently video laryngoscope feature is single、complex operation and less attention in the video processing and image processing、poor pictures and videos category management, so the study of video laryngoscope is needed.Samsung S5PV210 is the main chip of video laryngoscope system. The development of main application is based on the Android system. In this paper, three aspects were studied:1. Design and implementation of system hardware circuit. Image data of the throat is collected by OV3640 camera. Acquisited data is processed through the hardware circuit and dislpayed by LCD. The image can be displayed via HDMI and also can store video files through SD memory card. Hardware circuit also includes some support hardware circuit like LED lighting、preheating device and debugging interface.2. The development of applications. The FFmpeg multimedia library ported to the Android platform, the use of Android NDK technology and FFmpeg multimedia library. Encoding front-end camera video data with the H.264 standard format and displaying the captured video images. Using H.264 encoding compressed video file size, increased the ability of the device to store video files. In order to solve the problem of loading image slowly, using Android-Universal-Image-Loader completed the development of multi-threaded image loading and preview application. In order to improve the quality of images, the studing on auto exposure and auto white balance algorithm is processing.3. Android system kernel and file system crop and optimize boot speed. Modifying the underlying drivers and completing the custom key function. Cutting some unrequired drives, services-. softwares, Producing a customized boot screen and improving the boot speed.The project is designed a handheld video laryngoscope system which has LCD display、 HDMI and other multi-way video output.320w camera recorded the video and video frame rate is up to 30 frames per second, and pictures and videos stored in the external SD card, the whole system has high practical value.