Embedded Linux-based Digital Home Security Image Acquisition System

With the innovation of the technology in IT field, the IT technology has stepped into the state of Post PC Era. Embedded system has a giant development in various fields, and the application makes the researching on embedded system be a hot point. Especially, in the field of E-Home, various products spread in a sudden. The embedded systems make the life of people be more safer and efficient.There are some problems appearing in the housing surroundings about security: for one thing, the traditional methods of security are passive modes, and they can not make a determination immediately and record the reliable information. For another thing, even if security system has been installed in the zone, it still can not inform the house host about the unusual case. These defects must be erased, according to the conception of independent housing security.The system in this paper is the very system in housing surroundings, aiming at capturing the information immediately, and strengthening the reliability and integrity.Based on the feature of embedded system, the analysis of software and hardware, this paper has done the researchings, as below:This paper analyzed the trend of the field of the housing security, based on the housing surroundings, and has demonstrated the plan of using embedded system.Combined embedded Linux operating system, S3C2410, USB camera and GPRS module, a modern housing monitoring system has been formed. And, a miniature for housing surroundings has been brought up.Analyzed the technology of USB and ARM, researched on the setting of USB device under Linux, the driver of USB camera has been formed, the circuits of Core-board, infrared module and GPRS module have been finished.Based on the V4L and dual-buffer mode, the efficiency of capturing has been advanced. And JPEG has been applied to compress the frames.The results make it clear that the overall system has a high sensitivity. And it can realize the tasks of capturing unusual frames and alarming. What is more important, the system has the value of application and popularization in the market.