1、 1 外文原文 The Implementation of Embedded Image Acquisition Based on V4L2 LU Yinli,YU Hongli,ZHANG Pengpeng Abstract In view of the current situation of the less embedded Linux image acquisition application based on V4L2(Video for Linux Two), embedded image acquisition system based on V4L2 is designed.
2、S3C6410 is adopted as hardware development platform and Linux as software platform. After loading the driver of CMOS camera OV9650 and other relative drivers, image acquisition applications on the basis of V4L2 is compiled, adopting double frame buffer to reduce CPU utilization rate to accomplish ac
3、quisition and preview image. With the size of 400480 and the frame rate of 15 frames per second, the picture collected shows clearly and it has good quality. The experiment result indicates that the system has good scalability, and it offers a new idea for embedded hand-held devices. Keywords-V4L2;
4、OV9650; image acquisition; S3C6410; double frame buffer 2 I. INTRODUCTION The video image processing technology is widely used in electronic technology and computer technology. The image from a camera or other image acquisition equipments is transformed mathematically to get the information of digit
5、al image; then, it is encoded, filtered, enhanced, recovered, compressed, stored and other processes conducted by the computer; visual images and other results finally will be received. With the development of embedded technology, the current image acquisition technology is transformed from theanalo
6、gue to the digital. Among them, embedded image acquisition attracts more and more peoples attention for its superior performance . Embedded microprocessor is the best choice for the image processing system because of its high performance, cost-effective, and low power. Samsung S3C6410 has ARM11 core and adopts 64/32 bit internal bus architecture. It also includes many powerful hardware accelerators such as motion video processing, audio process and so on. An integrated MFC (Multi Format
