胶囊内窥镜系统图像压缩算法设计及实现  

The design and realization of image compression methodology of capsule endoscope

作　　者：周丁华 姜汉钧[2] 王月娟 吕晓娟[1] 王志华[2] 

机构地区：[1]火箭军总医院全军肝胆胃肠病中心,北京100088 [2]清华大学微电子研究所,北京100084

出　　处：《中国医学装备》2016年第2期5-9,共5页China Medical Equipment

基　　金：国家863计划资助项目(2008AA0107102)"基于极低功耗SoC芯片的消化道无线检测产品开发-消化道无线检测产品临床检测";军队"十一五"杰出人才课题(06J003)"消化道微型仿生机器人优化及其体内定位方法的研究"

摘　　要：目的：设计一种高效的压缩、存储和传输的图像处理系统,以满足高性能胶囊内窥镜对消化道疾病临床诊断的需要。方法：在图像处理系统的设计中引入在不同分解尺度取不同阈值的屏蔽函数和基于统计分析的优化编码方案,并对其进行专门测试。结果：通过专门的测试显示,用此图像处理系统的胶囊内窥镜的图像传输速率为12帧/s,景深0~50 mm,实现了图像数据的高效、高保真的压缩和高速的传输要求。结论：通过实现图像处理系统的设计,在极大降低能耗的同时可较好地解决图像传输、还原的应用需求,并能够满足消化道系统监测与诊断需求。Objective： To design one kind of image system with high efficiency scheme of image compression, storage and transmission to meet the needs of high performance endoscope. Methods： By introducing the shielding function which owns different threshold at different decomposition scales and the optimized coding scheme based on statistical analysis. And then we validated the endoscope by professional tests. Results： Experiments and clinical applications shown this capsule endoscope realized the features of 12 fps frame rate even for 480×480 images, DOF 0-50 mm. It realized high efficiency, high fidelity compression and high speed transmission of the image. Conclusion： The energy consumption of the image storage system had been greatly reduced through the design, and the application demands of image transmission and reduction had been solved. The capsule endoscope can well meet the requirements from system monitoring and diagnosis.

关 键 词：胶囊内窥镜 图像压缩算法 JPEG-LS编码器 低功耗 

分 类 号：R197.324[医药卫生—卫生事业管理]