Smart Image Sensor with Integrated Low Complexity Image Processing for Wireless Endoscope Capsules

作     者：李晓雯 张沕琳 王志华 Amine Bermak 

作者机构：Department of Electronic EngineeringTsinghua University Department of Electronic and Computer EngineeringHong Kong University of Science and Technology Institute of MicroelectronicsTsinghua University 

出 版 物：《Tsinghua Science and Technology》 (清华大学学报（自然科学版（英文版）)

年 卷 期：2009年第14卷第5期

页      面：586-592页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程] 10[医学] 

主　　题：wireless endoscope capsule digital pixel sensor JPEG-LS low power 

摘      要：A smart image sensor was developed which integrates a digital pixel image sensor array with an image processor, designed for wireless endoscope capsules. The camera-on-a-chip architecture and its on-chip functionality facilitate the design of the packaging and power consumption of the integrated capsule. The power reduction techniques were carried out at both the architectural and circuit level. Gray coding and power gating in the sensor array to eliminate almost 50% of the switch activity on the data bus and more than 99% of the power dissipation in each pixel at a transmitting rate of 2 frames per second. Filtering and compression in the processor reduces the data transmission by more than 2/3. A parallel fully pipelined architecture with a dedicated clock management scheme was implemented in the JPEG-LS engine to reduce the power consumption by 15.7%. The smart sensor has been implemented in 0.18 μm CMOS technology.