Video Collecting Platform Development Based On Embedded Linux

Video images collecting in the industrial and agricultural production, military, medical, consumer electronics and safety monitoring, and other fields has a very wide range of applications. The traditional image collecting system is collected by the CCD camera, collecting cards and computer components, the general function is more complete, but the larger, higher prices. With the emergence of embedded devices and development in the miniaturization of the system, network and intelligent direction. Embedded image collecting system is composed of the miniature camera, image processing and memory chips and microprocessors, such as a dedicated circuit system, a small, functional strong, rich interface features, and portable, and compared to the traditional image acquisition, embedded image acquisition system is small, portable, and can be used for complex environment of image acquisition.This paper introduces a method of embedded collecting system based on ARM processor, The programme series of embedded processors using the Samsung S3C2410 (ARM920T) for the CPU, USB camera and LCD; System software platform is embedded Linux2.6.14 operating system. With the traditional use of the Windows operating system on a PC running the programme, the system has smaller size and portability, and low memory. The software algorithms compared to the acquisition of existing algorithms .it is through the mmap function and LCD display buffer will be mapped to the user memory space, and directly to the memory areas to improve the literacy rate shows, and in the acquisition of the Two-time use of the buffer design, image collecting can be achieved at the real time displayed on the LCD, the system has dealt with so fast response, small size, low power consumption advantages. It is able to adapt to the network transmission.and it the last of this paper,it impoves the EZW algorithm the experimental results show that in the same compression ratio, this algorithm is better than EZW algorithm.System is moduled in design. and become a complete video image collecting system.and has a strong scalability. As the use of ARM processors, it is low consumption platform. this scheme adopts open source linux system.and doesn't use commercial software package,and develops form bottom completely,so the development cost of whole platform's software is low,and it has wide market foreground.