The Study And Implementation Of Distributed Image-collecting System

Distributed image-collecting system has been widely used in many fields, such as traffic management, industry, military, medical monitoring, home security etc. As we can see, distributed image-collecting system has merged into our daily lives, it reduces waste of human resource, improves our work efficiency, enhances our power of controlling remote devices, and makes our society more safe. Research on various solutions of distributed image collecting system, which is this thesis' main task, deserves special attention and is of great significance to design distributed image-collecting systems that are most suitable for applications.Image capture and compression, file system, and transport are three important components of distributed image-collecting system. Capture and compression module based on JPEG chip is introduced first, and it discusses how to design, implement image-collecting system using an image sensor and a JPEG encoding chip. Then, the dissertation introduces how to implement an optimized JPEG algorithm on ARM7TDMI-S, which is a popular CPU core. FDCT, division, fix-point processing and control of image quality are discussed in this part. Technical problems about transport and storage of image are investigated, and a general description on how to implement CANopen and NFFS are given here. At last, a distributed image-collecting system, which is used to detect the high voltage wires in electricity transmission, is designed and implemented to confirm viewpoints of the dissertation.The main contribution of this dissertation can be concluded as following:1. Research on architecture and solutions of distributed image-collecting system have been done, and results of testing can be referred in relative researches.2. Implement of reduced CANopen is useful for similar design in a way.3. A distributed image-collecting system that used to detect high voltage wires has been implemented.