Used In Embedded System Design Of The Ccd Image Sensor

Embedded systems have been widely used in various fields, including consumption digital products, mobile communication, and automotive electronics, as well as industrial controlling. This technique has been gradually promoting the development of these industries.This dissertation described the principle of laser lock-in image technique, and its theoretical model to establish mathematical analysis, and then presented embedded system. The embedded system is consisted of software and hardware. Development of software in embedded system could be divided into three parts: operating system kernel development, BSP driver development and upper application program development. Certain development board and embedded Linux operating system used in industry control product develop possess great generality, thus could be used as the basis to develop our own product, reducing product develop cycle.Equipments based on CCD image sensing could be implemented in the embedded system with miniaturization, portability, and product forming features. In this thesis, an embedded system which will be applied to CCD image sensing is realized. The software module and hardware module of the embedded system are designed; the software development environment is constructed on embedded Linux system; a hardware circuital driver program and user interface program is compiled; the driver programs and application programs is debugged by test programs designed. The debugging results suggest that the system could run as expected.In addition, the working principles of automobile anti-dazzling system were introduced. The anti-dazzling system was based on CCD photoelectric image detection processing, extracted the target image accurately and implemented real-time display. The experiment was performed. A high-power LED or semiconductor laser and CCD image is employed. The necessary image processing and system mange are completed with software. The results shows that the anti-dazzling system has efficient inhibition effect on strong background light,and could be used to acquire banckground image as strong light is present. The real-time character, accuracy and speed of the system could satisfy general application demand. The embedded system designed in this thesis could be installed and used on automobiles to make the anti-dazzling system implement for miniaturization, and could be used in production of laser lock-in image technique.